Apple Floppy Disk Drive - Revision history

Josh: DuoDisk chart: link to the copy on Disk II (Apple's p. 1.5) instead of repeating it with a wrong page range

2026-10-01T16:53:45Z

DuoDisk chart: link to the copy on Disk II (Apple's p. 1.5) instead of repeating it with a wrong page range

@@ Line 146: / Line 146: @@
 When Apple 3.5 drives are chained to a DuoDisk or UniDisk 5.25 and suddenly spin up and become inaccessible from an [[Apple IIGS]], read the part number on the gate array on the daisy-chain interface board. CXD1085A marks a Revision A board; replace it with a Revision B board (CXD1085B).<ref name="ss35" />
-== DuoDisk analogue card chip-swapping chart ==
+== DuoDisk ==
-The DuoDisk is Apple's dual 5.25-inch drive for the [[Apple II]] series, two [[Disk II]]-type mechanisms sharing one analogue card. Apple's ''DuoDisk Technical Procedures'' include a chip-swapping chart for that card, naming each chip by grid location and symptom.<ref name="duodisk">Apple Computer, ''DuoDisk Technical Procedures'', Section 1, Troubleshooting, pages 1.1 to 1.4 (rev. Dec 84 and Aug 85): general information, troubleshooting flowchart, the analogue card chip-swapping chart with engineering numbers 676-[ ]101 and 676-[ ]102, the warning about C21 and the 74LS125, and the C29/C30 removal. Bound in the Apple Service Support Training Programs binder described at [[Service Support Tranning Programs Laserwriter Technical Procedures Jan 1985]] ([[:File:Service Support Tranning Programs Laserwriter Technical Procedures Jan 1985.pdf]], PDF pages 166 to 170).</ref>
+The DuoDisk is Apple's dual 5.25-inch drive for the [[Apple II]] series, two [[Disk II]]-type mechanisms sharing one analogue card. Apple's chip-swapping chart for that card, from the ''DuoDisk Technical Procedures'' (p. 1.5), is on [[Disk II#DuoDisk|the Disk II page]].
 == Other Apple floppy drive service manuals ==

Josh: Copyedit; fix DuoDisk ref (DuoDisk Technical Procedures pp. 1.1-1.4, not LaserWriter), add chart symptom 5; correct eject-fault order to Apple's (mechanism first); drop uncited advice; infobox image size

2026-09-30T10:59:59Z

Copyedit; fix DuoDisk ref (DuoDisk Technical Procedures pp. 1.1-1.4, not LaserWriter), add chart symptom 5; correct eject-fault order to Apple's (mechanism first); drop uncited advice; infobox image size

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Josh: P4 verification: add Apple's own component-level DuoDisk chip-swapping chart and the C21 hot-plug warning, from the hosted Technical Procedures binder

2026-09-25T07:53:58Z

P4 verification: add Apple's own component-level DuoDisk chip-swapping chart and the C21 hot-plug warning, from the hosted Technical Procedures binder

@@ Line 178: / Line 178: @@
 * [[Apple PC 5.25 Drive Service Source]] - the 360K 5.25-inch drive. It is the only one with a rotational-speed figure: '''300 rpm''', with a 19 ms average seek, a 250 kbit/s transfer rate and a '''0.9 A peak on +12 V'''.<ref name="sspc525">''Apple PC 5.25 Drive'', Apple ''Service Source'', 15 pages, PDF distilled 14 December 1995 - hosted on this wiki as [[Apple PC 5.25 Drive Service Source]], file [[:File:Apple pc 5.25 drive.pdf]]. Specifications: average seek 19 ms; transfer rate 250 kbit/s; rotational speed 300 rpm; average startup 500 ms; 360K formatted, 2 surfaces, 40 tracks per surface, 48 tpi; +12 V ±10% maximum 0.6 A, peak 0.9 A, typical 0.36 A; +5 V ±5% maximum 0.65 A, typical 0.5 A.</ref>
 * [[Apple SuperDrive/HDI-20 Service Source]] - the external 1.4 MB SuperDrive and the HDI-20, and the only Apple external floppy drive volume with a symptom chart.
 == See Also ==

Josh: repair red link: point Apple 3.5 Drive at the hosted Service Source page

2026-09-25T06:57:52Z

repair red link: point Apple 3.5 Drive at the hosted Service Source page

← Older revision		Revision as of 07:57, 25 September 2026
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	== The Apple 3.5 Drive Mechanism ==		== The Apple 3.5 Drive Mechanism ==

	The mechanism Apple later shipped as the [[Apple 3.5 Drive]] is the same family and is properly specified in its own Service Source, which is useful because the M0131's own manual is not:<ref name="ss35">''Apple 3.5 Drive Service Source'', Apple Computer, Inc. — hosted on this wiki as [[:File:Apple 3.5 drive.pdf]]. Specifications: disk diameter 3.5 in., 2 recording surfaces, 80 tracks per inch; seek time track-to-track 6 ms maximum, settle time 30 ms maximum, drive startup time 600 ms maximum; head position accuracy ±0.035 mm; formatted capacity 800K and unformatted 1,246K, with the note that disks should be certified double-sided media; the list of directly supported computers and the note that one additional drive can be daisy-chained on the Apple IIGS; operating temperature 40–122 °F (5–50 °C), storage ‒40 to 140 °F with no condensation, relative humidity 5–90%; electrical +12 V standby 10 µA, typical 120 mA, peak 600 mA during eject only for a 2-second maximum, and +5 V standby 10 mA, typical 360 mA; size 2.01 × 4.72 × 7.87 in. (51 × 120 × 200 mm) and weight 2.8 lb (1.3 kg). Troubleshooting symptom charts, including the yellow-versus-red logic-board-to-drive cable checks and the CXD1085A/CXD1085B daisy-chain gate-array revision.</ref>		The mechanism Apple later shipped as the [[Apple 3.5 Drive Service Source\|Apple 3.5 Drive]] is the same family and is properly specified in its own Service Source, which is useful because the M0131's own manual is not:<ref name="ss35">''Apple 3.5 Drive Service Source'', Apple Computer, Inc. — hosted on this wiki as [[:File:Apple 3.5 drive.pdf]]. Specifications: disk diameter 3.5 in., 2 recording surfaces, 80 tracks per inch; seek time track-to-track 6 ms maximum, settle time 30 ms maximum, drive startup time 600 ms maximum; head position accuracy ±0.035 mm; formatted capacity 800K and unformatted 1,246K, with the note that disks should be certified double-sided media; the list of directly supported computers and the note that one additional drive can be daisy-chained on the Apple IIGS; operating temperature 40–122 °F (5–50 °C), storage ‒40 to 140 °F with no condensation, relative humidity 5–90%; electrical +12 V standby 10 µA, typical 120 mA, peak 600 mA during eject only for a 2-second maximum, and +5 V standby 10 mA, typical 360 mA; size 2.01 × 4.72 × 7.87 in. (51 × 120 × 200 mm) and weight 2.8 lb (1.3 kg). Troubleshooting symptom charts, including the yellow-versus-red logic-board-to-drive cable checks and the CXD1085A/CXD1085B daisy-chain gate-array revision.</ref>

	{\| class="wikitable styled-table" style="width:80%;"		{\| class="wikitable styled-table" style="width:80%;"

Josh: cite the PC 5.25 and SuperDrive Service Source volumes inline (P4 orphan fix)

2026-09-25T06:56:53Z

cite the PC 5.25 and SuperDrive Service Source volumes inline (P4 orphan fix)

← Older revision		Revision as of 07:56, 25 September 2026
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	No Apple figures for the M0131's release date, retail price, discontinuation date or part number could be traced, and none are stated here. The M0131's own Service Source contains take-apart procedures and an exploded view only — '''no specifications chapter at all'''<ref name="ss800" /> — which is why the figures above are drawn from the closely related Apple 3.5 Drive manual and are labelled as such.		No Apple figures for the M0131's release date, retail price, discontinuation date or part number could be traced, and none are stated here. The M0131's own Service Source contains take-apart procedures and an exploded view only — '''no specifications chapter at all'''<ref name="ss800" /> — which is why the figures above are drawn from the closely related Apple 3.5 Drive manual and are labelled as such.

			== Apple's other external floppy drive manuals ==
			Three further ''Service Source'' volumes cover Apple external floppy drives and are hosted here. None of them duplicates the others:
			* [[Apple 400K Drive Service Source]] - Take Apart and Exploded View only; no specifications and no symptom chart.
			* [[Apple PC 5.25 Drive Service Source]] - the 360K 5.25-inch drive. It is the only one with a rotational-speed figure: '''300 rpm''', with a 19 ms average seek, a 250 kbit/s transfer rate and a '''0.9 A peak on +12 V'''.<ref name="sspc525">''Apple PC 5.25 Drive'', Apple ''Service Source'', 15 pages, PDF distilled 14 December 1995 - hosted on this wiki as [[Apple PC 5.25 Drive Service Source]], file [[:File:Apple pc 5.25 drive.pdf]]. Specifications: average seek 19 ms; transfer rate 250 kbit/s; rotational speed 300 rpm; average startup 500 ms; 360K formatted, 2 surfaces, 40 tracks per surface, 48 tpi; +12 V ±10% maximum 0.6 A, peak 0.9 A, typical 0.36 A; +5 V ±5% maximum 0.65 A, typical 0.5 A.</ref>
			* [[Apple SuperDrive/HDI-20 Service Source]] - the external 1.4 MB SuperDrive and the HDI-20, and the only Apple external floppy drive volume with a symptom chart.

	== See Also ==		== See Also ==

Josh: Rebuild from Guide to the Macintosh Family Hardware ch.9 + the Apple 800K Drive and Apple 3.5 Drive Service Sources, both already hosted here but unused. Connector is DB-19 not DE-19. Added Apples real mechanism specifications (6 ms seek, 30 ms settle, 600 ms startup, +-0.035 mm head accuracy, 600 mA eject peak), the yellow-not-red drive cable fault that makes a Mac Plus eject continuously, the CXD1085A -> CXD1085B daisy-chain gate array fix, and the Restoring Mouse Eject procedure. Deleted u...

2026-09-23T18:21:35Z

Rebuild from Guide to the Macintosh Family Hardware ch.9 + the Apple 800K Drive and Apple 3.5 Drive Service Sources, both already hosted here but unused. Connector is DB-19 not DE-19. Added Apples real mechanism specifications (6 ms seek, 30 ms settle, 600 ms startup, +-0.035 mm head accuracy, 600 mA eject peak), the yellow-not-red drive cable fault that makes a Mac Plus eject continuously, the CXD1085A -> CXD1085B daisy-chain gate array fix, and the Restoring Mouse Eject procedure. Deleted u...

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Josh: Fix image syntax to File:...

2026-02-09T12:18:06Z

Fix image syntax to File:...

← Older revision		Revision as of 13:18, 9 February 2026
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	{{Infobox computer peripheral		{{Infobox computer peripheral
	\| image = Apple Floppy Disk Drive.jpg		\| image = [[File:Apple Floppy Disk Drive.jpg]]
	\| caption = Macintosh 800K External Drive (Model M0131)		\| caption = Macintosh 800K External Drive (Model M0131)
	\| manufacturer = Apple Computer, Inc. (Sony mechanism)		\| manufacturer = Apple Computer, Inc. (Sony mechanism)

Josh: Add infobox image

2026-02-09T12:15:47Z

Add infobox image

← Older revision		Revision as of 13:15, 9 February 2026
Line 1:		Line 1:
	{{Infobox computer peripheral		{{Infobox computer peripheral
	\| image =		\| image = Apple Floppy Disk Drive.jpg
	\| caption = Macintosh 800K External Drive (Model M0131)		\| caption = Macintosh 800K External Drive (Model M0131)
	\| manufacturer = Apple Computer, Inc. (Sony mechanism)		\| manufacturer = Apple Computer, Inc. (Sony mechanism)

Josh: Fix category to Apple Vintage Accessories

2026-02-09T12:03:46Z

Fix category to Apple Vintage Accessories

← Older revision		Revision as of 13:03, 9 February 2026
Line 178:		Line 178:
	* Wikipedia — Macintosh External Disk Drive		* Wikipedia — Macintosh External Disk Drive
	* Apple Technical Documentation		* Apple Technical Documentation

			[[Category:Apple Vintage Accessories]]

	{{Navbox-AppleVintageAccessories}}		{{Navbox-AppleVintageAccessories}}

	~~[[Category:Apple Peripherals]]~~
	~~[[Category:Storage Devices]]~~
	~~[[Category:Floppy Drives]]~~

Josh: Fix infobox template name

2026-02-09T12:02:38Z

Fix infobox template name

← Older revision		Revision as of 13:02, 9 February 2026
Line 1:		Line 1:
	{{Infobox ~~Accessory~~		{{Infobox computer peripheral
	\| image =		\| image =
	\| caption = Macintosh 800K External Drive (Model M0131)		\| caption = Macintosh 800K External Drive (Model M0131)