Weird and custom, unfortunately.
--
David Evans (NeXTMail/MIME OK) dfe...@bbcr.uwaterloo.ca
Computer/Synth Junkie http://bbcr.uwaterloo.ca/~dfevans/
University of Waterloo "Default is the value selected by the composer
Ontario, Canada overridden by your command." - Roland TR-707 Manual
: Weird and custom, unfortunately.
Motorola's MCM518128 (128k x 8) would be a guess, since PSRAMs simplify
the i/f to the 56k, but these, of course, aren't mfg'd anymore. I think
the orig. board was 96kbytes (32k x 24 maybe). Someday I'll meet someone
who has actually seen one!
: --
The official NeXT DSP expansion SIMM (part # N7013) has 3 ea.
Motorola static RAM "MCM6206CJ35" on it, and a 74F158A (probably
for address decode). This SIMM provides 32 kwords (24bits/word)
of DSP RAM when installed into that empty slot (this replaces the
on-board 8kwords DSP RAM, not in addition to it) on the NeXT CPU
board.
No alternative source for NeXT DSP RAM was available, although someone
at San Francisco State U. built a batch of SIMMs that had full RAM
capacity supported by 56001.
--
Peter Nitezki | pnit...@acm.org # Blessed art thou who knoweth
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