Difference between revisions of "Floppy Drives" - wiki.apple2.org

Difference between revisions of "Floppy Drives"

Jump to: navigation, search
Line 1: Line 1:
 
Table of Contents [[Web Reference]]
 
Table of Contents [[Web Reference]]
  
<A2Txt>5.25 Floppy Disk Drives</A2Txt>
+
== 5.25 Floppy Disk Drives - 20 Pin IDC ==
  
== Apple Disk ][ Drive ==
+
=== Apple Disk ][ Drive A2M0003 / A2M0004 ===
  
<A2Txt>Compatibility</A2Txt>:][, ][+, //e, or IIgs
+
<A2Txt>Compatibility:</A2Txt> ][, ][+, //e, or IIgs
  
<A2Txt>Interface:</A2Txt> 20 Pin IDC.
+
<A2Txt>Interface:</A2Txt> 20 Pin IDC via the Apple Disk II Controller or compatible/clone 20 pin IDC controller card.
  
<A2Txt>Connects via:</A2Txt> The Apple Disk II Controller or compatible/clone 20 pin IDC controller card. Using this drive with a IIgs would also require the controller card be installed internally, usually Slot 6 and that slot set via the Control Panel to 'Your Card' instead of 'Disk Port'.  
+
<A2Txt>//c, IIgs, and IIc Plus, IIgs ROM 3, LC Slot //e Card use:</A2Txt> See the section on Interfacing Information for more details. Using this drive with a IIgs would also require the controller card be installed internally, usually Slot 6 and that slot set via the Control Panel to 'Your Card' instead of 'Disk Port'.
  
<A2Txt>//c, IIgs, and IIc Plus, IIgs ROM 3, LC Slot //e Card use:</A2Txt> See the section on Interfacing Information for more details.
+
<A2Txt>Storage:</A2Txt> The Drive is compatible with ProDOS, DOS 3.3, Apple Pascal 1.2/1.3 & Apple CP/M It is a single sided,double density drive,It stores 143 K of information, or 560 Sectors of DOS 3.3, 280 ProDOS Blocks. This is a Apple GCR Device only and can not read any other formats even with additional software or hardware.
  
<A2Txt>Storage:</A2Txt> The Drive is compatible with ProDOS, DOS 3.3, Apple Pascal 1.2/1.3 & Apple CP/M It is a single sided,double density drive,It stores 143 K of information, or 560 Sectors of DOS 3.3, 280 ProDOS Blocks. This is a Apple GCR Device only and can not read any other formats even with additional software or hardware.
+
<A2Txt>Technical Specifications:</A2Txt> The Disk ][ and many similar third party / clones use a Shugart mechanism, and the analog card is an Apple designed carda and in the case of non-Apple drives, either a blatant clone or similar design. It can be adapted to a DB-19 but still falls under all the same usage restrictions as any other DB-19 drive and unless the conversion cable is equipped with an additional DB-19 connector the drive can only be used as the last device on a system as nothing else can attach to it.  
  
<A2Txt>Technical Specifications:</A2Txt> It uses a Shugart Mechanism, and the Analog card is an Apple card. It can be adapted to a DB-19 but still falls under all the same usage restrictions as any other DB-19 drive that is NOT the 'Platinum' drive, and unless the conversion cable is equipped with an additional DB-19 connector the drive can only be used as the last device on a system as nothing else can attach to it. There are also many Third Party drives based on this same or similar design, some are out right duplications and others are completely different such as the Rana Elite Series.
+
The Drive is compatible with ProDOS, DOS 3.3, Apple Pascal 1.2/1.3 & Apple CP/M It is a single sided, double density drive, It stores 143 K of information on 35 tracks, or 560 Sectors of DOS 3.3, 280 ProDOS Blocks. This is an Apple GCR Device only and can not read any other formats even with additional software or hardware.
  
 
Common problems occurred using this device:
 
Common problems occurred using this device:
Line 22: Line 22:
 
Plugged into controller card backwards or improperly aligned pins when plugged in.
 
Plugged into controller card backwards or improperly aligned pins when plugged in.
  
== 20 Pin 5.25 Drive controller ==
+
=== MicroSci A2 / A20 / A80 ===
 +
 
 +
<A2Txt>Compatibility:</A2Txt> ][, ][+, //e, or IIgs
  
The Apple Disk ][ Controller can be used for any brand 20 pin 5.25" drive. This controller is used in the Apple ][+ & //e. Can be used in a IIgs as well.
+
<A2Txt>Interface:</A2Txt> 20 Pin IDC via the Apple Disk II Controller, compatible or the MicroSci C2 controller card.
  
Drives Known to work with this card. (But not limited to these)
+
The MicroSci A2 and A20 are standard 143K / 40 track drives, Disk ][ compatible. The A80 is a high density also supports a faster access rate. It stores data in an 80 track format.  
  
  
<tab class=wikitable sep=bar>
+
=== Vista Solo / Quartet / V1200 ===
<A2Txt>Model Name</A2Txt>|<A2Txt>Manufacture</A2Txt>
 
Disk ][|Apple Computer
 
MicroSci|A5xxx
 
MicroSci|A70 High Density drive requires MicroSci CTRL'r)
 
Quentin Research|Quentin Research
 
Vista 5.25|Vista Computer/ACP(They also made the 5 disk Jukebox)
 
SuperDrive|4th Dimension
 
Elite I,II,III|Rana Systems(Elite II,III in 35/40 Track, Single Side mode only)
 
Super 5|Some island in the pacific
 
</tab>
 
  
 +
<A2Txt>Compatibility:</A2Txt> ][, ][+, //e, or IIgs
  
Table of Contents [[Web Reference]]
+
<A2Txt>Interface:</A2Txt> 20 Pin IDC via the Apple Disk II Controller, compatible or the Vista Disk controller card. 
  
 +
Vista Solo is a 143K / 35/40 track drive.
 +
Vista Quartet is a 640K / dual double sided solution.
 +
Vista V1200 is a high density, 80 track, double sided 5 disk 'changer'. It holds 5 disks in a magazine that is loaded in place of the disk.
  
== AppleDisk 5.25 / Compatibles (19 Pin) ==
+
=== Rana Systems Elite I, II, & III ===
  
DB-19 Connector version.
+
<A2Txt>Compatibility:</A2Txt> ][, ][+, //e, or IIgs
Drives that fall into this category are the Apple DuoDisk, Apple UniDisk 5.25", AppleDisk 5.25", any converted 20 Pin drives and many drives offered by other vendors with a DB 19 cable and daisy chain pass through port. The DuoDisk does not offer the pass through port because it is a 2 drive unit and since the 5.25" is always the last device on a drive chain, it is not needed.
 
  
 +
<A2Txt>Interface:</A2Txt> 20 Pin IDC via the Apple Disk II Controller, compatible or the Vista Disk controller card. 
  
<A2Txt>Compatibility:</A2Txt>][, ][+, //c, IIgs,, //e, Laser 128, Franklin Ace 500
+
Rana Elite I - 35/40 Track 143K standard, 160K in 'extended' format, (40 track)
 +
Rana Elite II - 35/40 & 80 Track, single sided. 143K, 160K, 320K
 +
Rana Elite III - 34/40 7 80 Track, double sided. 143K, 160K, 320K & 640K
  
 +
=== Concorde C-111 / 112 ===
  
(With either a DB-19 ('DuoDisk' / Apple 5.25" Controller) or a smartport (drive port) based computer such as the //c, IIgs, Laser 128, Franklin Ace 500.
+
The Concorde C-111 is a standard Disk ][ Compatible 35/40 track, 143K/163K drive where as the C-112 is a double sided drive that offers double the capacity of the C-111.
  
 +
=== Other 5.25" 20 Pin IDC Drives ===
  
Do NOT to plug these drives into any connection with the power to the computer ON! Bad Things do happen when you do this.
+
Examples of other manufactures of drives are Asuki, Maple, Franklin, Quentin Research, 'Super5'..
  
 +
Table of Contents [[Web Reference]]
  
*NOTE:20 pin drives that have been converted are only compatible with the ROM 01 IIgs. NOT the ROM 03,//c+^2or //e Emulation Card. See note(s) below.
+
== 5.25 Floppy Disk Drives - 19 Pin ==
  
 +
=== AppleDisk 5.25 (A9M0107) ===
  
NOTE:The Apple IIc Plus, IIgs ROM 03  and LC Slot //e Emulation card require the Apple Platinum AppleDisk 5.25 Drive. Model #A9M0107.
+
<A2Txt>Compatibility:</A2Txt> ][, ][+, //e, IIgs, Laser 128, or Franklin Ace 500 and any compatibles or derivatives of these.  
  
 +
<A2Txt>Interface:</A2Txt> 19 Pin via Inbuilt SmartPort or Apple 5.25" Disk Controller
  
<A2Txt>Uses:</A2Txt> Can be used as first or second drive.
+
The Platinum colored AppleDisk 5.25 aka Apple 5.25 drive is the one universal solution for all Apple II systems and most clones/compatibles. Attached via either the AppleDisk 5.25"  controller or SmartPort/Drive Port connectors.  This drive is compatible across the entire line. Be sure the model number is A9M0107 as this drive is identical to the UniDisk 5.25" in styling, the case color is the difference.  The UniDisk 5.25" is beige colored drive.  
  
 +
There are a few third party vendors who made a disk drive that was compatible with the AppleDisk 5.25", some of them are Applied Engineering and American Micro Research. Not all of their products would be, but the later model half height ones are and by this time it was seemingly the same drive that all the vendors were offering.
  
<A2Txt>Storage:</A2Txt> The Drive is compatible with ProDOS, DOS 3.3, Apple Pascal 1.2/1.3 & Apple CP/M It is a single sided,double density drive,It stores 143 K of information, or 560 Sectors of DOS 3.3, 280 ProDOS Blocks. This is a Apple GCR Device only and can not read any other formats even with additional software or hardware.
 
  
 +
=== Apple UniDisk 5.25 (A9M0104) ===
  
Common problems occurred using this device:
+
The UniDisk 5.25" disk drive is compatible with all Apple II models except the ROM 03 IIgs, IIc Plus and LC //e Card. These require the AppleDisk 5.25 (A9M0107) or compatible drives. 
Heads need cleaned
 
Speed Adjustment gets slow/faster.
 
Plugged into the computer with the power on. If this is done on a //c or IIgs you will kill the 341-0041 chip. (Known as the IWM or Incredible Woz Machine)
 
  
 +
=== Apple DuoDisk 5.25 (A9M0108) ===
  
1) This drive does NOT have a "daisy-chain" port on the back of the drive. This means this drive must be the last drive on a chain or the only 5.25" drive. It can not be the first drive in a set of 2.
+
The DuoDisk 5.25" disk drive is compatible with all Apple II models except the ROM 03 IIgs, IIc Plus and LC //e Card.  These require the AppleDisk 5.25 or compatible drives. Using the DuoDisk with a //c will result in only Drive 1 ever being used as Drive 2 is not accessible since the //c is really using drive the first 5.25" drive on the drive port / daisy chain as it's second 5.25" drive.  
  
 +
=== Apple UniFile / DuoFile 5.25 (A9M0xxx) ===
  
2) It seems that this condition sometimes may not apply to the //c+, depending on the date of manufacture of the computer,this should be approached on a case by case basis. If the drive works with AppleWorks 2.0 & ProDOS 8 1.7 & up, there should be no problems.
+
The Apple UniFile and DuoFile were to be a storage solution based on the Apple FileWare system which utilized Apple's Twiggy Drive. The Twiggy drive is a 640K double sided drive with horizontally opposed head placement allowing both read/write heads to function simultaneously for more efficient throughput.  
  
== 5.25 Drive Descriptions ==
+
=== Apple Uni/Duo Drive 'system' proposal ===
  
<A2Txt>Apple UniDisk 5.25</A2Txt>
+
The Uni/Duo drive 'system' was thought out to be compatible with any Apple computer system shipping by utilizing all the same connector on the back of the drive for both single and double drive units. This is evidenced by the DuoDisk 5.25" having the 25 pin connector, the Apple /// Plus having the same 25 pin connector and the original concept UniDisk 5.25" each having two 25 pin connectors. As well, the external FileWare drives were to have the 25 pin connector. This way you could use any floppy drive with any system that a cable was provided for.
  
The UniDisk 5.25" drive is a beige single 5.25" drive. It is a DB-19 type drive that supports daisy chaining. It IS NOT compatible with the ROM 03 IIgs, or Macintosh LC //e emulator card.
+
DB-19 Connector version.
 +
Drives that fall into this category are the Apple DuoDisk, Apple UniDisk 5.25", AppleDisk 5.25", any converted 20 Pin drives and many drives offered by other vendors with a DB 19 cable and daisy chain pass through port. The DuoDisk does not offer the pass through port because it is a 2 drive unit and since the 5.25" is always the last device on a drive chain, it is not needed.
  
This drive looks IDENTICAL to the AppleDisk 5.25" with the exception of the COLOR of the case. The Apple Disk 5.25" is a Platinum color.
 
  
<A2Txt>Apple DuoDisk</A2Txt>
+
== IIc Plus, IIgs ROM 3, LC Slot //e Card & 5.25" Drives ==
  
The DuoDisk is a 2 drive unit that uses the DB-19 connector. This drive is compatible with an Apple ][+ or //e using a DB-19 Controller card and the ROM 01 IIgs. It will not work on a //c (The //c has 1 5.25" built in) or the //c+^2, ROM 03 IIgs or Macintosh LC //e emulator card.
+
Smartport drive information & why some 5.25" drives don't work.
  
<A2Txt>AppleDisk 5.25</A2Txt>
+
The reason drives may not work with the IIgs ROM 03, IIc Plus or Macintosh LC //e emulator card is because around the introduction of the Apple IIc Plus, Apple changed the Smartport protocol to where each device hooked to it, (be it 5.25" drive, 3.5" drive or a Smartport compatible hard disk) needs an ID Byte. The UniDisk 5.25", DuoDisk and most 3rd party drives DO NOT CONTAIN this needed ID Byte rendering such drives unusable with the newer Smartport protocol.
  
The AppleDisk 5.25" drive is a platinum single 5.25" drive. It is a DB-19 type drive that supports daisy chaining. It IS compatible with ALL APPLE computers that can use a 5.25" Apple II based drive. This drive is compatible, with the ROM 03 IIgs, the //c+ and the Macintosh LC //e emulator card.
+
The difference is due to the way Apple implemented the Write Protect circuit on their own disk drives. The Apple design integrates the Stepper Motor Phase 2 in the write protect status detection where as many third party drive manufactures used a simple ground to complete the circuit. Incompatible drives on these models will just spin at startup, the recalibration will not take place. However placing a disk into the drive enough to pass the Write Protect switch, or a write protected disk, before turning on the computer will allow the drive to boot. Thus it is possible to use incompatible third party drives with the IIc Plus or ROM 3 in a constant write protected state.  
  
This drive looks '''IDENTICAL''' to the Apple UniDisk 5.25" with the exception of the color of the case. '''BEWARE'''. The UniDisk 5.25" is '''NOT THE SAME AND WILL NOT WORK IN ALL CASES WHERE THE APPLEDISK 5.25" WILL WORK'''.
+
=== 20 Pin drives: Converting to 19 pin ===
  
== Interfacing Information ==
+
The 20 Pin Disk ][, or compatible, when combined with a 19 pin adapter or replacement cable, can be used with a //c or IIgs ROM 00 or 01 via the Smart Port/Drive Port connector, or at the end of the daisy chain as the last 5.25"/Last device on the chain. When it is used with the //c it is assigned to Slot 6, Drive 2. When used with a IIgs it will be Slot 6, Drive 1 or 2 depending on the position it is connected on the Daisy Chain.
  
<A2Txt>5.25 //c, IIgs, and IIc Plus, IIgs ROM 3, LC Slot //e Card use</A2Txt>
+
=== Apple Disk ][ Converting to 19 pin. Addendum ===
  
Smartport drive information & why some 5.25" drives don't work.
+
In some configurations the Apple Disk ][ Drive also works when the cable is changed to a 19 pin cable. This is dependent on variations of the Analog Card in the Disk ][ and varies widely. YMMV.
  
The reason drives may not work with the IIgs ROM 03, IIc Plus or Macintosh LC //e emulator card is because around the introduction of the Apple IIc Plus, Apple changed the Smartport protocol to where each device hooked to it, (be it 5.25" drive, 3.5" drive or a Smartport compatible hard disk) needs an ID Byte. The Apple Disk ][, UniDisk 5.25", DuoDisk and most 3rd party drives DO NOT CONTAIN this needed ID Byte rendering such drives unusable with the newer Smartport protocol.
 
  
The 20 Pin Disk ][ when combined with a 19 pin adapter or replacement cable, can be used with a //c or IIgs ROM 00 or 01 via the Smart Port/Drive Port connector. When it is used with the //c it is assigned to Slot 6, Drive 2. When used with a IIgs it will be Slot 6, Drive 1 or 2 depending on the position it is connected on the Daisy Chain. The Disk ][ will generally not work with the IIc Plus or IIgs ROM 3 due to hardware changes in the drive detection on these models. The difference is due to the way Apple implemented the Write Protect circuit on their own disk drives. The Apple design integrates the Stepper Motor Phase 2 in the write protect status detection where as many third party drive manufactures used a simple ground to complete the circuit. Incompatible drives on these models will just spin at startup, the recalibration will not take place. However placing a disk into the drive enough to pass the Write Protect switch, or a write protected disk, before turning on the computer will allow the drive to boot. Thus it is possible to use incompatible third party drives with the IIc Plus or ROM 3 in a constant write protected state.
+
== Interfacing Information ==
  
Daisy Chain explained
+
=== Daisy Chain explained ===
  
 
The term daisy chain is where each device in a system plugs into the previous device, thus eliminating the need for additional interfaces. Each device contains a connector to plug the next one in. On the back of the Apple UniDisk 5.25", AppleDisk 5.25", Apple UniDisk 5.25" and the AppleDisk 3.5" is a DB-19 Connector identical to the one that the drive is plugged into. In a drive chain on an Apple II Computer, ANY 3.5" device(s) must always come before any 5.25" device(s)
 
The term daisy chain is where each device in a system plugs into the previous device, thus eliminating the need for additional interfaces. Each device contains a connector to plug the next one in. On the back of the Apple UniDisk 5.25", AppleDisk 5.25", Apple UniDisk 5.25" and the AppleDisk 3.5" is a DB-19 Connector identical to the one that the drive is plugged into. In a drive chain on an Apple II Computer, ANY 3.5" device(s) must always come before any 5.25" device(s)
Line 117: Line 119:
 
Other things that use daisy chaining on the Apple are SCSI hard disks and AppleTalk (LocalTalk) networking and Ethernet networking. Although Ethernet and AppleTalk to don't quite 'look' the same, it's still a daisy chain system.
 
Other things that use daisy chaining on the Apple are SCSI hard disks and AppleTalk (LocalTalk) networking and Ethernet networking. Although Ethernet and AppleTalk to don't quite 'look' the same, it's still a daisy chain system.
  
1) A Modification may be necessary for the DuoDisk to work on a IIgs
+
=== 35 vs. 40 or more tracks ===
2) As noted, certain IIc Plus+ units seem to work with any version of the 19 Pin 5.25 drive, and do not require the 'platinum drive'
 
Additional IWM/technical information:
 
http://www.stockly.com/forums/showthread.php?t=9
 
  
3.5" Drives:
+
The default capacity on Apple 5.25" DSDD floppy storage is 35 tracks, 16 sectors per track.  Some drives, including most of what Apple offers are actually capable of 40 tracks per inch.  There are mods for DOS 3.3 to make it format up to 40 tracks, but keep in mind, these disks may not work in another drive. If there is a problem it is usually within the last 5 tracks, the additional ones, that can't be read as they are beyond the normal range. However this is usually only the earliest 5.25" drives as the industry standard was 40 tracks per inch.  For clarification, the track layout on all drives is identical, the 'extras' are added to the end, the spacing, layout, beginning on the disk, etc- does not change.
  
Apple made two different 3.5" drives for the Apple II, the AppleDisk 3.5" and the UniDisk 3.5". The AppleDisk 3.5" is Apple Platinum colored and was introduced along with the Apple IIgs. It is compatible with the Apple IIgs, IIc Plus, //e Emulation Card, Apple SuperDrive Controller and Universal Disk Controller / Laser 128. It DOES NOT WORK WITH THE LIRON Controller.
+
=== 13 vs. 16 Sectors per Track ===
  
== Apple SuperDrive Controller ==
+
When the Apple Disk ][ was first offered it was 13 sectors per track. Shortly after introduction this was increased to 16 sectors.  Apple used to provide little round stickers that had an Apple logo silhouette in red with a '16' on white type. What Apple should have actually done was provided the same sticker with a '13' for those few disks you would have left over, not for all the new ones you were going to format.
  
This is a 3.5" drive controller card made by Apple Computer that can be used with an Enhanced Apple //e or IIgs to use an Apple FDHD (1.44M) drive or other compatible high density drive. The initial shipments of the SuperDrive controller are/were titled the 'Apple 3.5" drive controller, this was renamed to the SuperDrive controller to avoid confusion with the earlier product
 
  
It will also work with any daisy-chainable 3.5" drive that is capable of plugging into the floppy port on the IIgs or Mac. Such drives are:
+
=== DOS 3.3 Maximum Capacity ===
  
<tab class=wikitable sep=bar>
+
The largest volume size Apple DOS 3.3 can handle without any modification what so ever is 400K. The VTOC (Volume Table of Contents) directly supports up to 400K of tracks/sectors in a 32 sector per track maxim
<A2Txt>Drive Type</A2Txt>|<A2Txt>Manufacture</A2Txt>
+
1) A Modification may be necessary for the DuoDisk to work on a IIgs
UniDisk 3.5|Apple Computer, Inc.
+
2) As noted, certain IIc Plus+ units seem to work with any version of the 19 Pin 5.25 drive, and do not require the 'platinum drive'
AppleDisk 3.5|Apple Computer, Inc.
 
ASA800K|American Micro Research
 
800K Drive|Applied Engineering
 
1.44M Drive|Applied Engineering
 
</tab>
 
  
== Apple 3.5 Controller (aka the 'Liron' card) ==
+
=== 720K ProDOS Volumes ===
  
The Liron card has an IWM (342-0041) chip in the middle of the card and is labeled "Liron" on the back side. This is the original 3.5" card, also known as the Apple SmartPort card, it is the //c SmartPort on a card and can control external SmartPort hard disks such as the ProAPP, Quark QC-10, Chinook/Squential Systems external //c Hard Drive.  
+
If you have an DSDD (Double Density) 3.5" MFM drive via a PC Transporter, Blue Disk or Urphi controller, you can format 720K disks as ProDOS volumes. These disks CAN NOT be read in ANYTHING that is 800K only with exception of an AppleDisk 3.5" hooked up to a PC Transporter. If it's an Apple or compatible 800K drive hooked to ANYTHING other than a PC transporter you CAN NOT READ THESE 720K DISKS.  They are MFM. These drives can NOT do MFM with exception of the PC Transporter is doing something specific since it has a hybrid version of the IWM integrated with it.
 +
 
 +
Additional IWM/technical information:
 +
http://www.stockly.com/forums/showthread.php?t=9
  
<tab class=wikitable sep=bar>
 
<A2Txt>Drive Type</A2Txt>|<A2Txt>Manufacture</A2Txt>
 
UniDisk 3.5|Apple Computer, Inc.
 
ProAPP 10, 20, 40|ProAPP, Inc.
 
Quark QC-10|Quark, Inc.
 
Chinook CT-20, CT-40|Chinook, Inc.
 
CT-100|Sequential Systems
 
</tab>
 
  
 
== 3.5" Floppy Drives ==
 
== 3.5" Floppy Drives ==
  
=== AppleDisk 3.5 ===
+
Apple made two different 3.5" drives for the Apple II, the AppleDisk 3.5" and the UniDisk 3.5". The AppleDisk 3.5" is Apple Platinum colored and was introduced along with the Apple IIgs. With exception of the //c and the Liron card, it is compatible where a 3.5" drive is supported on the Apple II.
 +
 
 +
 
 +
=== AppleDisk 3.5 (A9M0106) ===
  
This is an external Apple 800K DSDD 3.5" Drive. See the compatibility chart after the UniDisk 3.5" information for more detail.
+
This is an external Apple 800K DSDD 3.5" GCR . It can also read 400K disks. Drive. See the compatibility chart after the UniDisk 3.5" information for more detail.
  
=== Apple UniDisk 3.5 ===
+
=== Apple UniDisk 3.5 (A2M2053) ===
  
 
This is an External Apple 800K DSDD 3.5". Compatibility with the following computers is as follows:
 
This is an External Apple 800K DSDD 3.5". Compatibility with the following computers is as follows:
Line 170: Line 161:
 
<A2Txt>Apple //e:</A2Txt> Requires an Apple 3.5" controller or Apple SuperDrive controller. The SuperDrive controller requires an Enhanced //e
 
<A2Txt>Apple //e:</A2Txt> Requires an Apple 3.5" controller or Apple SuperDrive controller. The SuperDrive controller requires an Enhanced //e
  
 +
<A2Txt>Apple //c:</A2Txt> Requires a ROM upgrade in older //c units to be installed if it's not already installed. If the model # on the //c is A2S4000 then it may not have the ROM installed. To find out, turn on the computer and from BASIC, (the ] prompt) type 'PR#7'. If the EXTERNAL 5.25" drive 'boots' then it needs the ROM upgrade. IF the computer says 'AppleTalk offline' it has the ROM installed. If no external drive is installed and no AppleTalk message appears you still need the newer ROM.
 +
 +
'''The UniDisk 3.5" drive is NOT COMPATIBLE with the Laser Universal Disk Controller. It will do Bad Things when it's plugged in. Do Not Try It.'''
  
Universal Disk Controller / Laser 128
+
Another way is to turn on the computer, when you can see the monitor hold down both the Open and Closed Apple keys. (Opposite sides of the spacebar) and hit CTRL and RESET. If the computer goes into a checkerboard type pattern you have the new ROM installed. If the computer goes to an alternating vertical line pattern with a click between each alternation. (Turn up volume, on left side, under keyboard). You will need a ROM upgrade. The part # for this ROM upgrade is 342-0033.
  
'''The UniDisk 3.5" drive is NOT COMPATIBLE with the Laser Universal Disk Controller. It will do Bad Things when it's plugged in. Do Not Try It.'''
 
  
 +
<A2Txt>Apple IIc Plus:</A2Txt> Nothing additional is required to use the UniDisk 3.5" with an
 +
Apple IIc Plus.
  
The FDHD Drive requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to function in an Apple //e, and to be used as a High Density drive on a IIgs. The FDHD Drive will function as a normal 800K (AppleDisk 3.5") when plugged in the back of the IIgs as opposed to being used with the controller installed.
 
  
<A2Txt>Apple //c:</A2Txt> Requires a ROM upgrade in older //c units to be installed if it's not already installed. If the model # on the //c is A2S4000 then it may not have the ROM installed. To find out, turn on the computer and from BASIC, (the ] prompt) type 'PR#7'. If the EXTERNAL 5.25" drive 'boots' then it needs the ROM upgrade. IF the computer says 'AppleTalk offline' it has the ROM installed. If no external drive is installed and no AppleTalk message appears you still need the newer ROM.
+
<A2Txt>Apple IIgs:</A2Txt> No additional hardware is required to use the UniDisk 3.5" with an Apple IIgs directly although you can use the UniDisk 3.5" with either an Apple 3.5" controller card or Apple SuperDrive controller in the slot of an Apple IIgs. The UniDisk normally plugs into the floppy port of the Apple IIgs.
  
 +
The UniDisk is not the recommended 3.5" drive for use with an Apple IIgs although it will work fine for normal usage. It will be slower than using the recommended drive, the AppleDisk 3.5". It looks similar to the UniDisk 3.5" and is the same color as the Apple IIgs itself. Using a UniDisk on a IIgs while using any GS specific software that runs under GS/OS will require that a device driver be installed on the boot volume as well. The driver, titled 'UniDisk.3.5' can be found on the system disk set and be installed using the installer on the System Tools disk of System Disk 5.0.4 or the Installer disk of System 6.0. Using the UniDisk on the IIgs will also be slower than using the proper 3.5" drive and some disk based software from such groups as the FTA may simply not run.
  
Another way is to turn on the computer, when you can see the monitor hold down both the Open and Closed Apple keys. (Opposite sides of the spacebar) and hit CTRL and RESET. If the computer goes into a checkerboard type pattern you have the new ROM installed. If the computer goes to an alternating vertical line pattern with a click between each alternation. (Turn up volume, on left side, under keyboard). You will need a ROM upgrade. The part # for this ROM upgrade is 342-0033.
+
<A2Txt>Apple //e Emulation Card:</A2Txt> No additional hardware is needed to use the UniDisk 3.5" with the Apple //e Emulation card. It simply plugs into the Floppy Port of the card, which is the larger plug on the two way cable supplied with the card.
  
  
<A2Txt>Apple IIc Plus:</A2Txt> Nothing additional is required to use the UniDisk 3.5" with an \
+
=== Apple FDHD / SuperDrive 3.5 (G7287) ===
Apple //c+.
 
  
 +
The FDHD ('FudHead') / SuperDrive was introduced for the Macintosh and is not an Apple II specific 3.5" drive but due to it's nature it is compatible where an AppleDisk 3.5" (A9M0106) would otherwise be appropriate and requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to function as a High Density drive on an Apple II. There is no solution for high density drives in any Apple II that does not have expansion slots with exception of the Mark Twain, prototype IIgs which has an on board SuperDrive controller.
  
<A2Txt>Apple IIgs:</A2Txt> No additional hardware is required to use the UniDisk 3.5" with an Apple IIgs directly although you can use the UniDisk 3.5" with either an Apple 3.5" controller card or Apple SuperDrive controller in the slot of an Apple IIgs. The UniDisk normally plugs into the floppy port of the Apple IIgs.
 
  
 +
=== Haba Systems HabaDisk ===
  
Important Note: The UniDisk is not the recommended 3.5" drive for use with an Apple IIgs although it will work fine for normal usage. It will be slower than using the recommended drive, the AppleDisk 3.5". It looks similar to the UniDisk 3.5" and is the same color as the Apple IIgs itself. Using a UniDisk on a IIgs while using any GS specific software that runs under GS/OS will require that a device driver be installed on the boot volume as well. The driver, titled 'UniDisk.3.5' can be found on the system disk set and be installed using the installer on the System Tools disk of System Disk 5.0.4 or the Installer disk of System 6.0. Using the UniDisk on the IIgs will also be slower than using the proper 3.5" drive and some disk based software from such groups as the FTA may simply not run.
+
The HabaDisk is a 3.5" 320K drive that uses the Apple Disk ][ or compatible controller.  
  
 +
=== Amdek AmDisk I, III ===
  
<A2Txt>Apple //e Emulation Card:</A2Txt> No additional hardware is needed to use the UniDisk 3.5" with the Apple //e Emulation card. It simply plugs into the Floppy Port of the card, which is the larger plug on the two way cable supplied with the card.
+
Amdek, known more for monitors, also brought a 3" (3 inch) drive to market for the Apple II and Atari, for the Apple II it used a standard Disk ][ controller. The AmDisk I was replacement for the Disk ][. Down to the fact that if you want to use the back side of the disk you had to remove it and turn it over.  
  
 +
The AmDisk III was a 360K double sided drive system that was marketed for the Atari and IBM PC, it was supposed to come to the Apple II but never did.
  
 
== 3.5" Drive Compatibility Chart ==
 
== 3.5" Drive Compatibility Chart ==
Line 205: Line 202:
  
 
<tab class=wikitable sep=bar>
 
<tab class=wikitable sep=bar>
UniDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
+
UniDisk 3.5"|Apple Computer, Inc.|A2M2053
 
</tab>
 
</tab>
  
=== IIc Plus ===
+
=== Apple IIc Plus ===
  
 
<tab class=wikitable sep=bar>
 
<tab class=wikitable sep=bar>
 
<A2Txt>Drive</A2Txt>|<A2Txt>Manufacture</A2Txt>|<A2Txt>Model No.</A2Txt>
 
<A2Txt>Drive</A2Txt>|<A2Txt>Manufacture</A2Txt>|<A2Txt>Model No.</A2Txt>
UniDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
+
UniDisk 3.5"|Apple Computer, Inc.|A2M2053
AppleDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
+
AppleDisk 3.5"|Apple Computer, Inc.|A9M0106
Apple External FDHD SuperDrive |Apple Computer, Inc.|M0112
+
Apple External FDHD SuperDrive |Apple Computer, Inc.|G7287
 
AMR 800K|American Micro Research|ASA800K
 
AMR 800K|American Micro Research|ASA800K
 
</tab>
 
</tab>
  
=== IIgs ===
+
The FDHD/SuperDrive will function as an AppleDisk 3.5" 800K drive only, when attached to the SmartPort on the IIc Plus.
 +
 
 +
=== Apple ][, ][+, //e (With Controller) ===
 +
 
 +
<tab class=wikitable sep=bar>
 +
Drive|Manufacture|Model No.|Controller
 +
Apple 400K|Apple Computer, Inc.|M130|UDC
 +
Apple 800K External|Apple Computer, Inc.|M131|UDC
 +
Apple UniDisk 3.5|Apple Computer, Inc.|A2M2053| Liron, SuperDrive, Universal, UDC
 +
AppleDisk 3.5"|Apple Computer, Inc.|A9M0106| SuperDrive, Universal, UDC
 +
Apple External FDHD SuperDrive |Apple Computer, Inc.|G7287|SuperDrive, Universal, UDC
 +
AE 800K|Applied Engineering|AE800K|SuperDrive, Universal, UDC
 +
AE HD|Applied Engineering|AEHD|SuperDrive, Universal, UDC
 +
AMR 800K|American Micro Research|ASA800K|SuperDrive, Universal, UDC
 +
*Teac 720K MFM|Teac|235FN|Blue Disk, Urphi
 +
*Teac 1.44MB MFM|Teac|235HF|Blue Disk, Urphi
 +
Ehman 800K|Ehman Engineering|Garbage!|UDC
 +
Laser 3.5"|Video Technology|Same Garbage as Ehman|UDC
 +
Chinnon|Taiwanese Generic Clone |More Garbage|UDC
 +
</tab>
 +
 
 +
See the the section on [[Floppy Controllers]] for details on what these descriptions mean.
 +
 
 +
Apple ][ & ][+ support listed is with respect to electrical/mechanical needs. Additional software and memory is likely required. IE, AppleSoft ROM for the Apple ][, 64K system RAM and ProDOS. ProDOS 1.0 does run on 48K but you can't do much. The requirement was upped to 64K with later releases.
 +
 
 +
Some of these drives without eject buttons will require the constant use of a paper clip or software eject initiation where available. This applies to the Apple 400K, 800K and Ehman drives.
 +
 
 +
*The Teac reference can apply to most any 34 pin DSDD or DSHD MFM drive. MFM will provide 720K DD or 1.44MB HD and will NOT read 800K GCR disks. The MFM 720K volume will be a ProDOS volume. This will NOT be readable in any 800K drive either. Only the SuperDrive or AE HD 1.44 will read the 720K ProDOS volume, or any other 720K volume, period.  These can be used with the Blue Disk or Urphi controller only.
 +
 
 +
The FDHD/SuperDrive requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to function as a high density drive with an Apple //e. The FDHD Drive will function as a normal 800K (AppleDisk 3.5") when connected to the Apple Universal Controller or UDC.
 +
 
 +
The SuperDrive controller itself requires an Enhanced //e to function and therefore will not work with anything less.
 +
 
 +
=== Apple IIgs ===
  
 
<tab class=wikitable sep=bar>
 
<tab class=wikitable sep=bar>
<A2Txt>Drive</A2Txt>|<A2Txt>Manufacture</A2Txt>|<A2Txt>Model No.</A2Txt>
+
<A2Txt>Drive</A2Txt>|<A2Txt>Manufacture</A2Txt>|<A2Txt>Model No.</A2Txt>|<A2Txt>Controller</A2Txt>
AppleDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
+
AppleDisk 3.5"|Apple Computer, Inc.|A9M0106
Apple External FDHD SuperDrive |Apple Computer, Inc.|M0112
+
Apple External FDHD SuperDrive |Apple Computer, Inc.|G7287
UniDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
+
UniDisk 3.5"|Apple Computer, Inc.|A2M2053
AMR 800K|American Micro Research| ASA800K
+
AMR 800K|American Micro Research|ASA800K
 
AE 3.5"(800K)|Applied Engineering|AE800K
 
AE 3.5"(800K)|Applied Engineering|AE800K
 
AE 3.5" HD(1.44 Meg)|Applied Engineering|AEHD
 
AE 3.5" HD(1.44 Meg)|Applied Engineering|AEHD
 
AE 3.5" HD(1.6 Meg)|Applied Engineering|AEHD+
 
AE 3.5" HD(1.6 Meg)|Applied Engineering|AEHD+
 
</tab>
 
</tab>
 +
 +
The FDHD/SuperDrive requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to be used as a High Density drive on a IIgs. The controller card will also handle 800K. The FDHD Drive will also function as a normal 800K (AppleDisk 3.5") when plugged in the back of the IIgs as opposed to being used with the controller installed.
 +
 +
 
=== Macintosh ===
 
=== Macintosh ===
  
 
<tab class=wikitable sep=bar>
 
<tab class=wikitable sep=bar>
 
<A2Txt>Drive</A2Txt>|<A2Txt>Manufacture</A2Txt>|<A2Txt>Model No.</A2Txt>
 
<A2Txt>Drive</A2Txt>|<A2Txt>Manufacture</A2Txt>|<A2Txt>Model No.</A2Txt>
Apple 400K|Apple Computer, Inc.|M0002
+
Apple 400K|Apple Computer, Inc.|M130
Apple 800K External|Apple Computer, Inc.|Mxxxx
+
Apple 800K External|Apple Computer, Inc.|M131
AppleDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
+
AppleDisk 3.5"|Apple Computer, Inc.|A9M0106
Apple External FDHD SuperDrive |Apple Computer, Inc.|M0112
+
Apple External FDHD SuperDrive |Apple Computer, Inc.|G7287
UniDisk 3.5"|Apple Computer, Inc.|A9Mxxxx
 
 
AMR 800K|American Micro Research |ASA800K
 
AMR 800K|American Micro Research |ASA800K
 
AE 3.5"(800K)|Applied Engineering|AE800K
 
AE 3.5"(800K)|Applied Engineering|AE800K

Revision as of 05:17, 10 September 2007

Table of Contents Web Reference

5.25 Floppy Disk Drives - 20 Pin IDC

Apple Disk ][ Drive A2M0003 / A2M0004

Compatibility:

][, ][+, //e, or IIgs

Interface:

20 Pin IDC via the Apple Disk II Controller or compatible/clone 20 pin IDC controller card.

//c, IIgs, and IIc Plus, IIgs ROM 3, LC Slot //e Card use:

See the section on Interfacing Information for more details. Using this drive with a IIgs would also require the controller card be installed internally, usually Slot 6 and that slot set via the Control Panel to 'Your Card' instead of 'Disk Port'.

Storage:

The Drive is compatible with ProDOS, DOS 3.3, Apple Pascal 1.2/1.3 & Apple CP/M It is a single sided,double density drive,It stores 143 K of information, or 560 Sectors of DOS 3.3, 280 ProDOS Blocks. This is a Apple GCR Device only and can not read any other formats even with additional software or hardware.

Technical Specifications:

The Disk ][ and many similar third party / clones use a Shugart mechanism, and the analog card is an Apple designed carda and in the case of non-Apple drives, either a blatant clone or similar design. It can be adapted to a DB-19 but still falls under all the same usage restrictions as any other DB-19 drive and unless the conversion cable is equipped with an additional DB-19 connector the drive can only be used as the last device on a system as nothing else can attach to it.

The Drive is compatible with ProDOS, DOS 3.3, Apple Pascal 1.2/1.3 & Apple CP/M It is a single sided, double density drive, It stores 143 K of information on 35 tracks, or 560 Sectors of DOS 3.3, 280 ProDOS Blocks. This is an Apple GCR Device only and can not read any other formats even with additional software or hardware.

Common problems occurred using this device: Heads need cleaned Speed Adjustment gets slow/faster. Plugged into controller card backwards or improperly aligned pins when plugged in.

MicroSci A2 / A20 / A80

Compatibility:

][, ][+, //e, or IIgs

Interface:

20 Pin IDC via the Apple Disk II Controller, compatible or the MicroSci C2 controller card.

The MicroSci A2 and A20 are standard 143K / 40 track drives, Disk ][ compatible. The A80 is a high density also supports a faster access rate. It stores data in an 80 track format.


Vista Solo / Quartet / V1200

Compatibility:

][, ][+, //e, or IIgs

Interface:

20 Pin IDC via the Apple Disk II Controller, compatible or the Vista Disk controller card.

Vista Solo is a 143K / 35/40 track drive. Vista Quartet is a 640K / dual double sided solution. Vista V1200 is a high density, 80 track, double sided 5 disk 'changer'. It holds 5 disks in a magazine that is loaded in place of the disk.

Rana Systems Elite I, II, & III

Compatibility:

][, ][+, //e, or IIgs

Interface:

20 Pin IDC via the Apple Disk II Controller, compatible or the Vista Disk controller card.

Rana Elite I - 35/40 Track 143K standard, 160K in 'extended' format, (40 track) Rana Elite II - 35/40 & 80 Track, single sided. 143K, 160K, 320K Rana Elite III - 34/40 7 80 Track, double sided. 143K, 160K, 320K & 640K

Concorde C-111 / 112

The Concorde C-111 is a standard Disk ][ Compatible 35/40 track, 143K/163K drive where as the C-112 is a double sided drive that offers double the capacity of the C-111.

Other 5.25" 20 Pin IDC Drives

Examples of other manufactures of drives are Asuki, Maple, Franklin, Quentin Research, 'Super5'..

Table of Contents Web Reference

5.25 Floppy Disk Drives - 19 Pin

AppleDisk 5.25 (A9M0107)

Compatibility:

][, ][+, //e, IIgs, Laser 128, or Franklin Ace 500 and any compatibles or derivatives of these.

Interface:

19 Pin via Inbuilt SmartPort or Apple 5.25" Disk Controller

The Platinum colored AppleDisk 5.25 aka Apple 5.25 drive is the one universal solution for all Apple II systems and most clones/compatibles. Attached via either the AppleDisk 5.25" controller or SmartPort/Drive Port connectors. This drive is compatible across the entire line. Be sure the model number is A9M0107 as this drive is identical to the UniDisk 5.25" in styling, the case color is the difference. The UniDisk 5.25" is beige colored drive.

There are a few third party vendors who made a disk drive that was compatible with the AppleDisk 5.25", some of them are Applied Engineering and American Micro Research. Not all of their products would be, but the later model half height ones are and by this time it was seemingly the same drive that all the vendors were offering.


Apple UniDisk 5.25 (A9M0104)

The UniDisk 5.25" disk drive is compatible with all Apple II models except the ROM 03 IIgs, IIc Plus and LC //e Card. These require the AppleDisk 5.25 (A9M0107) or compatible drives.

Apple DuoDisk 5.25 (A9M0108)

The DuoDisk 5.25" disk drive is compatible with all Apple II models except the ROM 03 IIgs, IIc Plus and LC //e Card. These require the AppleDisk 5.25 or compatible drives. Using the DuoDisk with a //c will result in only Drive 1 ever being used as Drive 2 is not accessible since the //c is really using drive the first 5.25" drive on the drive port / daisy chain as it's second 5.25" drive.

Apple UniFile / DuoFile 5.25 (A9M0xxx)

The Apple UniFile and DuoFile were to be a storage solution based on the Apple FileWare system which utilized Apple's Twiggy Drive. The Twiggy drive is a 640K double sided drive with horizontally opposed head placement allowing both read/write heads to function simultaneously for more efficient throughput.

Apple Uni/Duo Drive 'system' proposal

The Uni/Duo drive 'system' was thought out to be compatible with any Apple computer system shipping by utilizing all the same connector on the back of the drive for both single and double drive units. This is evidenced by the DuoDisk 5.25" having the 25 pin connector, the Apple /// Plus having the same 25 pin connector and the original concept UniDisk 5.25" each having two 25 pin connectors. As well, the external FileWare drives were to have the 25 pin connector. This way you could use any floppy drive with any system that a cable was provided for.

DB-19 Connector version. Drives that fall into this category are the Apple DuoDisk, Apple UniDisk 5.25", AppleDisk 5.25", any converted 20 Pin drives and many drives offered by other vendors with a DB 19 cable and daisy chain pass through port. The DuoDisk does not offer the pass through port because it is a 2 drive unit and since the 5.25" is always the last device on a drive chain, it is not needed.


IIc Plus, IIgs ROM 3, LC Slot //e Card & 5.25" Drives

Smartport drive information & why some 5.25" drives don't work.

The reason drives may not work with the IIgs ROM 03, IIc Plus or Macintosh LC //e emulator card is because around the introduction of the Apple IIc Plus, Apple changed the Smartport protocol to where each device hooked to it, (be it 5.25" drive, 3.5" drive or a Smartport compatible hard disk) needs an ID Byte. The UniDisk 5.25", DuoDisk and most 3rd party drives DO NOT CONTAIN this needed ID Byte rendering such drives unusable with the newer Smartport protocol.

The difference is due to the way Apple implemented the Write Protect circuit on their own disk drives. The Apple design integrates the Stepper Motor Phase 2 in the write protect status detection where as many third party drive manufactures used a simple ground to complete the circuit. Incompatible drives on these models will just spin at startup, the recalibration will not take place. However placing a disk into the drive enough to pass the Write Protect switch, or a write protected disk, before turning on the computer will allow the drive to boot. Thus it is possible to use incompatible third party drives with the IIc Plus or ROM 3 in a constant write protected state.

20 Pin drives: Converting to 19 pin

The 20 Pin Disk ][, or compatible, when combined with a 19 pin adapter or replacement cable, can be used with a //c or IIgs ROM 00 or 01 via the Smart Port/Drive Port connector, or at the end of the daisy chain as the last 5.25"/Last device on the chain. When it is used with the //c it is assigned to Slot 6, Drive 2. When used with a IIgs it will be Slot 6, Drive 1 or 2 depending on the position it is connected on the Daisy Chain.

Apple Disk ][ Converting to 19 pin. Addendum

In some configurations the Apple Disk ][ Drive also works when the cable is changed to a 19 pin cable. This is dependent on variations of the Analog Card in the Disk ][ and varies widely. YMMV.


Interfacing Information

Daisy Chain explained

The term daisy chain is where each device in a system plugs into the previous device, thus eliminating the need for additional interfaces. Each device contains a connector to plug the next one in. On the back of the Apple UniDisk 5.25", AppleDisk 5.25", Apple UniDisk 5.25" and the AppleDisk 3.5" is a DB-19 Connector identical to the one that the drive is plugged into. In a drive chain on an Apple II Computer, ANY 3.5" device(s) must always come before any 5.25" device(s)

Other things that use daisy chaining on the Apple are SCSI hard disks and AppleTalk (LocalTalk) networking and Ethernet networking. Although Ethernet and AppleTalk to don't quite 'look' the same, it's still a daisy chain system.

35 vs. 40 or more tracks

The default capacity on Apple 5.25" DSDD floppy storage is 35 tracks, 16 sectors per track. Some drives, including most of what Apple offers are actually capable of 40 tracks per inch. There are mods for DOS 3.3 to make it format up to 40 tracks, but keep in mind, these disks may not work in another drive. If there is a problem it is usually within the last 5 tracks, the additional ones, that can't be read as they are beyond the normal range. However this is usually only the earliest 5.25" drives as the industry standard was 40 tracks per inch. For clarification, the track layout on all drives is identical, the 'extras' are added to the end, the spacing, layout, beginning on the disk, etc- does not change.

13 vs. 16 Sectors per Track

When the Apple Disk ][ was first offered it was 13 sectors per track. Shortly after introduction this was increased to 16 sectors. Apple used to provide little round stickers that had an Apple logo silhouette in red with a '16' on white type. What Apple should have actually done was provided the same sticker with a '13' for those few disks you would have left over, not for all the new ones you were going to format.


DOS 3.3 Maximum Capacity

The largest volume size Apple DOS 3.3 can handle without any modification what so ever is 400K. The VTOC (Volume Table of Contents) directly supports up to 400K of tracks/sectors in a 32 sector per track maxim 1) A Modification may be necessary for the DuoDisk to work on a IIgs 2) As noted, certain IIc Plus+ units seem to work with any version of the 19 Pin 5.25 drive, and do not require the 'platinum drive'

720K ProDOS Volumes

If you have an DSDD (Double Density) 3.5" MFM drive via a PC Transporter, Blue Disk or Urphi controller, you can format 720K disks as ProDOS volumes. These disks CAN NOT be read in ANYTHING that is 800K only with exception of an AppleDisk 3.5" hooked up to a PC Transporter. If it's an Apple or compatible 800K drive hooked to ANYTHING other than a PC transporter you CAN NOT READ THESE 720K DISKS. They are MFM. These drives can NOT do MFM with exception of the PC Transporter is doing something specific since it has a hybrid version of the IWM integrated with it.

Additional IWM/technical information: http://www.stockly.com/forums/showthread.php?t=9


3.5" Floppy Drives

Apple made two different 3.5" drives for the Apple II, the AppleDisk 3.5" and the UniDisk 3.5". The AppleDisk 3.5" is Apple Platinum colored and was introduced along with the Apple IIgs. With exception of the //c and the Liron card, it is compatible where a 3.5" drive is supported on the Apple II.


AppleDisk 3.5 (A9M0106)

This is an external Apple 800K DSDD 3.5" GCR . It can also read 400K disks. Drive. See the compatibility chart after the UniDisk 3.5" information for more detail.

Apple UniDisk 3.5 (A2M2053)

This is an External Apple 800K DSDD 3.5". Compatibility with the following computers is as follows:

The UniDisk 3.5" can be used on the following Apple II Systems, and it's requirements are listed with it.

Apple ][, ][ Plus

 : Requires 64K, ProDOS and an Apple 3.5" drive controller.

Apple //e:

Requires an Apple 3.5" controller or Apple SuperDrive controller. The SuperDrive controller requires an Enhanced //e

Apple //c:

Requires a ROM upgrade in older //c units to be installed if it's not already installed. If the model # on the //c is A2S4000 then it may not have the ROM installed. To find out, turn on the computer and from BASIC, (the ] prompt) type 'PR#7'. If the EXTERNAL 5.25" drive 'boots' then it needs the ROM upgrade. IF the computer says 'AppleTalk offline' it has the ROM installed. If no external drive is installed and no AppleTalk message appears you still need the newer ROM.

The UniDisk 3.5" drive is NOT COMPATIBLE with the Laser Universal Disk Controller. It will do Bad Things when it's plugged in. Do Not Try It.

Another way is to turn on the computer, when you can see the monitor hold down both the Open and Closed Apple keys. (Opposite sides of the spacebar) and hit CTRL and RESET. If the computer goes into a checkerboard type pattern you have the new ROM installed. If the computer goes to an alternating vertical line pattern with a click between each alternation. (Turn up volume, on left side, under keyboard). You will need a ROM upgrade. The part # for this ROM upgrade is 342-0033.


Apple IIc Plus:

Nothing additional is required to use the UniDisk 3.5" with an

Apple IIc Plus.


Apple IIgs:

No additional hardware is required to use the UniDisk 3.5" with an Apple IIgs directly although you can use the UniDisk 3.5" with either an Apple 3.5" controller card or Apple SuperDrive controller in the slot of an Apple IIgs. The UniDisk normally plugs into the floppy port of the Apple IIgs.

The UniDisk is not the recommended 3.5" drive for use with an Apple IIgs although it will work fine for normal usage. It will be slower than using the recommended drive, the AppleDisk 3.5". It looks similar to the UniDisk 3.5" and is the same color as the Apple IIgs itself. Using a UniDisk on a IIgs while using any GS specific software that runs under GS/OS will require that a device driver be installed on the boot volume as well. The driver, titled 'UniDisk.3.5' can be found on the system disk set and be installed using the installer on the System Tools disk of System Disk 5.0.4 or the Installer disk of System 6.0. Using the UniDisk on the IIgs will also be slower than using the proper 3.5" drive and some disk based software from such groups as the FTA may simply not run.

Apple //e Emulation Card:

No additional hardware is needed to use the UniDisk 3.5" with the Apple //e Emulation card. It simply plugs into the Floppy Port of the card, which is the larger plug on the two way cable supplied with the card.


Apple FDHD / SuperDrive 3.5 (G7287)

The FDHD ('FudHead') / SuperDrive was introduced for the Macintosh and is not an Apple II specific 3.5" drive but due to it's nature it is compatible where an AppleDisk 3.5" (A9M0106) would otherwise be appropriate and requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to function as a High Density drive on an Apple II. There is no solution for high density drives in any Apple II that does not have expansion slots with exception of the Mark Twain, prototype IIgs which has an on board SuperDrive controller.


Haba Systems HabaDisk

The HabaDisk is a 3.5" 320K drive that uses the Apple Disk ][ or compatible controller.

Amdek AmDisk I, III

Amdek, known more for monitors, also brought a 3" (3 inch) drive to market for the Apple II and Atari, for the Apple II it used a standard Disk ][ controller. The AmDisk I was replacement for the Disk ][. Down to the fact that if you want to use the back side of the disk you had to remove it and turn it over.

The AmDisk III was a 360K double sided drive system that was marketed for the Atari and IBM PC, it was supposed to come to the Apple II but never did.

3.5" Drive Compatibility Chart

There are 3 types of 3.5" drives for Apple Computers: NOTE:Any of these drives with the exception of the UniDisk 3.5" can be used with the Laser Universal Disk controller installed in a slotted Apple II.

Apple //c

UniDisk 3.5" Apple Computer, Inc. A2M2053

Apple IIc Plus

Drive
Manufacture
Model No.
UniDisk 3.5" Apple Computer, Inc. A2M2053
AppleDisk 3.5" Apple Computer, Inc. A9M0106
Apple External FDHD SuperDrive Apple Computer, Inc. G7287
AMR 800K American Micro Research ASA800K

The FDHD/SuperDrive will function as an AppleDisk 3.5" 800K drive only, when attached to the SmartPort on the IIc Plus.

Apple ][, ][+, //e (With Controller)

Drive Manufacture Model No. Controller
Apple 400K Apple Computer, Inc. M130 UDC
Apple 800K External Apple Computer, Inc. M131 UDC
Apple UniDisk 3.5 Apple Computer, Inc. A2M2053 Liron, SuperDrive, Universal, UDC
AppleDisk 3.5" Apple Computer, Inc. A9M0106 SuperDrive, Universal, UDC
Apple External FDHD SuperDrive Apple Computer, Inc. G7287 SuperDrive, Universal, UDC
AE 800K Applied Engineering AE800K SuperDrive, Universal, UDC
AE HD Applied Engineering AEHD SuperDrive, Universal, UDC
AMR 800K American Micro Research ASA800K SuperDrive, Universal, UDC
*Teac 720K MFM Teac 235FN Blue Disk, Urphi
*Teac 1.44MB MFM Teac 235HF Blue Disk, Urphi
Ehman 800K Ehman Engineering Garbage! UDC
Laser 3.5" Video Technology Same Garbage as Ehman UDC
Chinnon Taiwanese Generic Clone More Garbage UDC

See the the section on Floppy Controllers for details on what these descriptions mean.

Apple ][ & ][+ support listed is with respect to electrical/mechanical needs. Additional software and memory is likely required. IE, AppleSoft ROM for the Apple ][, 64K system RAM and ProDOS. ProDOS 1.0 does run on 48K but you can't do much. The requirement was upped to 64K with later releases.

Some of these drives without eject buttons will require the constant use of a paper clip or software eject initiation where available. This applies to the Apple 400K, 800K and Ehman drives.

  • The Teac reference can apply to most any 34 pin DSDD or DSHD MFM drive. MFM will provide 720K DD or 1.44MB HD and will NOT read 800K GCR disks. The MFM 720K volume will be a ProDOS volume. This will NOT be readable in any 800K drive either. Only the SuperDrive or AE HD 1.44 will read the 720K ProDOS volume, or any other 720K volume, period. These can be used with the Blue Disk or Urphi controller only.

The FDHD/SuperDrive requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to function as a high density drive with an Apple //e. The FDHD Drive will function as a normal 800K (AppleDisk 3.5") when connected to the Apple Universal Controller or UDC.

The SuperDrive controller itself requires an Enhanced //e to function and therefore will not work with anything less.

Apple IIgs

Drive
Manufacture
Model No.
Controller
AppleDisk 3.5" Apple Computer, Inc. A9M0106
Apple External FDHD SuperDrive Apple Computer, Inc. G7287
UniDisk 3.5" Apple Computer, Inc. A2M2053
AMR 800K American Micro Research ASA800K
AE 3.5"(800K) Applied Engineering AE800K
AE 3.5" HD(1.44 Meg) Applied Engineering AEHD
AE 3.5" HD(1.6 Meg) Applied Engineering AEHD+

The FDHD/SuperDrive requires a separate controller card, the Apple II 3.5" Controller Card, Apple P/N A0076LL/A in order to be used as a High Density drive on a IIgs. The controller card will also handle 800K. The FDHD Drive will also function as a normal 800K (AppleDisk 3.5") when plugged in the back of the IIgs as opposed to being used with the controller installed.


Macintosh

Drive
Manufacture
Model No.
Apple 400K Apple Computer, Inc. M130
Apple 800K External Apple Computer, Inc. M131
AppleDisk 3.5" Apple Computer, Inc. A9M0106
Apple External FDHD SuperDrive Apple Computer, Inc. G7287
AMR 800K American Micro Research ASA800K
AE 3.5"(800K) Applied Engineering AE800K
Ehman 800K Ehman Engineering Garbage!
Laser 3.5" Video Technology Same Garbage as Ehman
Chinnon Taiwanese Generic Clone More Garbage

Content is available under Creative Commons Attribution-NonCommercial-ShareAlike unless otherwise noted.
Powered by MediaWiki