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Home▸ Forums▸ 68kMLA▸ ROM SIMM Pin Out for SE/30 and Mac II Family — #5
Post #5 by Trash80toHP_Mini
Source Forum68kMLA
CategorySoftware
Post DateTue, 2 Mar 2010 - 19:03
Original URLhttps://68kmla.org/bb/threads/rom-simm-pin-out-for-se-30-and-mac-ii-family.20010/
Post
In other words the ROM SIMM address pins are numbered for byte-wise addressing, while in practice the ROM SIMM is wired for word addressing (four bytes per address).
How would that affect addressing the ROM slot for using a memory expansion card in a VM scheme?

I've been looking at the Portable ROM slot's 8 MB of burst mode addressable memory space as a great spot to stick some VM hacked SRAM on a card, There's also a nice additional chunk of memory space "reserved for Apple" . . .

. . . that I'm fairly certain they've no longer got any serious plans to use! }:)

By the way, have you also got a copy of DCaDftMFH? :?:

I had to special order my copy back in the day! ;)

}:) :rambo: :D ;) :o)

mp.ls