[comp.sys.mac.hardware] Parity Ram

nevai@gem.mps.ohio-state.edu (Paul Nevai) (10/19/89)

What is this Parity RAM?
Can I use regular 1 Meg SiMMs (80 ns) in a Mac II ci?

Please email answer.


Paul Nevai                            nevai@mps.ohio-state.edu (Internet)
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chuq@Apple.COM (Chuq Von Rospach) (10/20/89)

>What is this Parity RAM?

Parity RAM is 9 bit RAM instead of the normal 8bit RAM. The 9th bit is used
to check for 1bit errors.

>Can I use regular 1 Meg SiMMs (80 ns) in a Mac II ci?

If you have a normal II ci, you should use regular SiMMs. If you've bought
the Parity option to a II ci, you can put regular SiMMs in it, but parity
for any bank with an 8Bit SiMM in it will be disabled.


-- 

Chuq Von Rospach <+> Editor,OtherRealms <+> Member SFWA/ASFA
chuq@apple.com <+> CI$: 73317,635 <+> [This is myself speaking]

Trust Mama Nature to remind us just how important things like sci.aquaria's
name really is in the scheme of things.

Mike_Bell@zip.ei.dupont.com (Mike Bell) (07/17/90)

Is there any refer