Macintosh Performa 640CD DOS Compatible - Revision history

Josh: Red-link sweep: retarget delegation links to the pages that actually exist (LC 550/LC 580/Performa 6100 sub-pages do not, the Performa 550/580 and Power Macintosh 6100 ones do), fix the malformed 'Macintosh Power Macintosh 5400' title, and de-link targets with no page

2026-09-27T13:16:04Z

Red-link sweep: retarget delegation links to the pages that actually exist (LC 550/LC 580/Performa 6100 sub-pages do not, the Performa 550/580 and Power Macintosh 6100 ones do), fix the malformed 'Macintosh Power Macintosh 5400' title, and de-link targets with no page

← Older revision		Revision as of 14:16, 27 September 2026
Line 109:		Line 109:
	* [[Macintosh LC 630 DOS Compatible]]		* [[Macintosh LC 630 DOS Compatible]]
	* [[Macintosh Performa 631CD]]		* [[Macintosh Performa 631CD]]
	* [[Macintosh Performa ~~630CD~~ DOS Compatible]]		* [[Macintosh Performa 640CD DOS Compatible]]

	== References ==		== References ==

Josh: Apple Service Source: the Macintosh side is a full 68040 with FPU, not a 68LC040; the DOS card ships with 4 MB and tops out at 32 MB (not 8 MB); Mac-side maximum is 52 MB; case width and depth were transposed; sound is 8-bit mono in / 8-bit stereo out; added the PDS adapter board with its PC/AT game-controller connector and the separate DOS-Compatible sound board

2026-09-27T12:40:20Z

Apple Service Source: the Macintosh side is a full 68040 with FPU, not a 68LC040; the DOS card ships with 4 MB and tops out at 32 MB (not 8 MB); Mac-side maximum is 52 MB; case width and depth were transposed; sound is 8-bit mono in / 8-bit stereo out; added the PDS adapter board with its PC/AT game-controller connector and the separate DOS-Compatible sound board

@@ Line 8: / Line 8: @@
 | discontinued = February 1996
 | price        = US$2,199
-| cpu          = Motorola 68LC040 @ 33 MHz + Intel 486DX2 @ 66 MHz
+| cpu          = Motorola 68040 @ 33 MHz + Intel 80486DX2 @ 66 MHz
-| memory       = 8 MB Mac RAM + 8 MB DOS RAM (expandable)
+| memory       = 8 MB Mac-side RAM (4 MB built in + 4 MB SIMM), max 52 MB; 4 MB on the DOS card, max 32 MB
 | storage      = 500 MB IDE hard drive, 2× CD-ROM, 1.44 MB floppy drive
 | display      = Supports up to 832×624 at 8-bit color
-| sound        = Stereo 16-bit sound input/output
+| sound        = 8-bit mono input, 8-bit stereo output (16-bit in CD mode)
-| dimensions   = 4.3" H × 12.6" W × 16.5" D
+| dimensions   = 4.3" H × 16.5" W × 12.6" D (10.95 × 41.95 × 32 cm)
 | weight       = 19 lbs (8.6 kg)
 | os           = System 7.1.2P – Mac OS 8.1 / MS-DOS 6.22 / Windows 3.1
@@ Line 71: / Line 71: @@
 == Troubleshooting ==
 See the [[Macintosh LC 630 Troubleshooting]] page. For DOS-specific issues, refer to [[Macintosh LC 630 DOS Compatible]].
 == See Also ==
@@ Line 78: / Line 112: @@
 == References ==
 <references />
 [[Category:Apple Vintage Computers]]

Josh: Create main article for Performa 640CD DOS Compatible

2026-02-10T11:07:37Z

Create main article for Performa 640CD DOS Compatible

New page

{{Infobox computer
| name = Macintosh Performa 640CD DOS Compatible
| image = [[File:Macintosh_LC_630.jpg]]
| caption = Macintosh Performa 640CD DOS Compatible
| manufacturer = Apple Computer, Inc.
| type = Personal Computer
| release date = May 1, 1995
| discontinued = February 1996
| price = US$2,199
| cpu = Motorola 68LC040 @ 33 MHz + Intel 486DX2 @ 66 MHz
| memory = 8 MB Mac RAM + 8 MB DOS RAM (expandable)
| storage = 500 MB IDE hard drive, 2× CD-ROM, 1.44 MB floppy drive
| display = Supports up to 832×624 at 8-bit color
| sound = Stereo 16-bit sound input/output
| dimensions = 4.3" H × 12.6" W × 16.5" D
| weight = 19 lbs (8.6 kg)
| os = System 7.1.2P – Mac OS 8.1 / MS-DOS 6.22 / Windows 3.1
| predecessor = [[Macintosh Performa 630CD|Performa 630CD]]
| successor = [[Power Macintosh 6100 DOS Compatible|Power Mac 6100 DOS Compatible]]
| codename = Crusader
| model = M3076
}}
The '''Macintosh Performa 640CD DOS Compatible''' is a dual-platform personal computer manufactured by Apple Computer and released on May 1, 1995.<ref>{{cite web |url=https://en.wikipedia.org/wiki/Macintosh_Quadra_630 |title=Macintosh Quadra 630 |publisher=Wikipedia |access-date=2026-02-10}}</ref> It combines the [[Macintosh Performa 631CD|Performa 631CD]] with an Intel 486DX2 processor card, allowing the computer to run both Mac OS and DOS/Windows applications.

The Performa 640CD DOS Compatible was not sold in the United States and was marketed primarily in international markets.

== Dual-Platform Architecture ==
The system features two processors:
* '''Macintosh:''' Motorola 68LC040 @ 33 MHz
* '''DOS/Windows:''' Intel 486DX2 @ 66 MHz on a PDS card

Users could switch between Mac and DOS environments, with the DOS card appearing as a virtual PC within the Mac OS.

=== DOS Card Specifications ===
* Intel 486DX2 processor at 66 MHz
* Dedicated RAM (up to 32 MB)
* Shared use of display, keyboard, and mouse
* Includes MS-DOS 6.22 and Windows 3.1<ref>{{cite web |url=https://lowendmac.com/1994/performa-630/ |title=Performa 630 and LC 630 |publisher=Low End Mac |access-date=2026-02-10}}</ref>

The DOS card occupies the LC PDS slot, leaving the comm and video slots available for other expansion.

== Memory and Storage ==
=== Mac RAM ===
8 MB standard with two 72-pin SIMM sockets for expansion up to 52 MB total.

=== DOS RAM ===
The DOS card has dedicated RAM expandable up to 32 MB independent of Mac system RAM.

=== Storage ===
* 500 MB IDE hard drive (partitioned for Mac and DOS)
* 2× Apple CD 300i plus CD-ROM drive
* 1.44 MB SuperDrive floppy (accessible from both environments)

== Display and Graphics ==
1 MB of dedicated DRAM for Mac video. The DOS card provides VGA-compatible graphics.

== Bundle Contents ==
* Modem
* Apple display (varies by market)
* Keyboard and mouse
* MS-DOS 6.22
* Windows 3.1
* Mac consumer software bundle

== General Maintenance ==
For maintenance procedures, refer to the [[Macintosh LC 630 DOS Compatible]] page. General maintenance is covered on the [[Macintosh LC 630 General Maintenance]] page.

== Capacitor Replacement Guide ==
See the [[Macintosh LC 630 Capacitor Replacement Guide]] page.

== Troubleshooting ==
See the [[Macintosh LC 630 Troubleshooting]] page. For DOS-specific issues, refer to [[Macintosh LC 630 DOS Compatible]].

== See Also ==
* [[Macintosh LC 630 DOS Compatible]]
* [[Macintosh Performa 631CD]]
* [[Macintosh Performa 630CD DOS Compatible]]

== References ==
<references />

[[Category:Apple Vintage Computers]]