Microsoft KB Archive/94750

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Macintosh Computers that Can Access More than 8 MB of Memory

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Q94750

SUMMARY
Because of certain limitations of the Macintosh system architecture, some Macintosh computers cannot access more than 8 megabytes (MB) of RAM. The following lists describe which Macintoshes do not have any known means of accessing more than 8 MB of RAM, which Macintoshes can access more than 8 MB of RAM with a special Control Panel device, and which Macintoshes can directly access more than 8 MB of RAM (32-bit clean Macintoshes).

The following Macintoshes do not have a known method of accessing more than 8 MB of RAM:

Macintosh Plus

Macintosh SE

Macintosh Classic

Powerbook 100

Powerbook 140 The following machines have ROM chips that do not allow a Macintosh to access more than 8 MB of RAM under normal circumstances. Through a special distribution agreement between Apple Computer and Connectix Corporation, a Control Panel device called Mode 32 is available free of charge and will allow the following machines to access more than 8 MB of memory:

Macintosh II

Macintosh IIx

Macintosh IIcx

Macintosh SE/30 The following computers have 32-bit clean ROMs and can address more than 8 MB of RAM:

Macintosh Classic II

Macintosh Duo 210

Macintosh Duo 230

Macintosh IIci

Macintosh IIfx

Macintosh IIsi

Macintosh IIvx

Macintosh LC (limited to 10 MB of RAM)

Macintosh LC II (limited to 10 MB of RAM)

Macintosh Performa 200

Macintosh Performa 400

Macintosh Performa 600

Macintosh Powerbook 145

Macintosh Powerbook 160

Macintosh Powerbook 170

Macintosh Powerbook 180

Quadra 700

Quadra 900

Quadra 950 For further information on Macintosh computers and memory management, query on the following words in the Microsoft Knowledge Base:

"optimizing and performance" For further information regarding Macintosh system memory configurations and Mode 32, call Apple at (800) 776-2333.

The products included here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: Mode32 32-bit

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