🚀 go-pugleaf

In article <5134@cisunx.UUCP>, jasst3@cisunx.UUCP (Jeffrey A. Sullivan) writes:
> I have a question regarding the 256K SIMMs in the Mac SE.  I have an SE and
> am about to have 2 1M SIMMs put into it tyo boost my RAM to 2.5M.  I am also
> planning (in the relatively near future) to sell the SE and get a Mac ][.  My
> Question is this:  Can I just slip those 2 256K SImms into the second bank
> of the ]['s memory banks (along with another pair of 256K SIMMs) and have
> an extra meg?  Are the speeds of the chips OK?
No, you cannot just plug those two in, you'll need two more as well.  The Mac II
requires memory expansions in groups of four (4) SIMMs.  If the chips are 120nS
you'll be ok on speed.

> 
> Also, is it possible to un-do a 2M expansion to an SE so I could use the 2
> 1M SIMMs in the ][ and put the 256K SIMMs back in the SE?
Yes, it's possible to undo the expansion to the SE, but you'll still need four
SIMMs for the Mac II, so the 2 1MB SIMMs are only useful in the SE (or a Plus)
in that quantity.

> 
> This raises another question:  What are the allowable increments for adding
> SIMMs to a Mac ][?  Can I pop in 1M SIMMs 1 at a time to bump my memory up
> by 1 Meg increments?  What does the ][ come with: 4 256K SIMMs?
The allowable configurations for the Mac II are:
	1 MB:	4 256KB SIMMs in the four slots closest to the right side (facing)
	2 MB:	8 256KB SIMMs
	4 MB:	4 1MB SIMMs in the four slots closest to the right side
	5 MB:	4 1MB SIMMs in the four rightmost slots & 4 256KB SIMMs in the other four slots
	8 MB:	8 1MB SIMMs


Dennis Cohen
Ashton-Tate Glendale Development Center
dBASE Mac Development Team
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