Will the SIMM RAM take the soldered in RAM's place, or is it set up to always appear above the first 1 MB of RAM?
I can't believe that I can't locate any of these pestiferous POS SIMMs in my MacPartsHorde . . . but I can't!
I'd appreciate it it someone would sell me a set of these Paleolithic keychain fobs for a hack project test.
bigmessowires wrote:I have a matched set of 4 if you still need them. Pulled from a Mac Plus, just a few weeks ago, so they definitely work.
What are you building that needs 256k SIMMs?
AichEss has already made the generous offer of mailing a set out for me tomorrow, but thanks!
I'm re-testing the IIfx ROM SIMM in a IIsi . . . Hypothesis, in hopes that the minimum requirement of 1MB SIMMS to work in the IIfx, would be that 1MB was the smallest custom SIMM Apple ever made available for that $10,000 beast.
Even in 1990, a 4MB SIMM as the lower limit probably ought to have been the choice of any other Unix capable Machine Mfr for anything they had the stones to declare as "wicked fast!"
The IIsi has 1MB soldered in as Bank A, so before hacking 4MB or more into Bank A . . .
. . . I might as well see if installing 1MB in Bank B will do the trick for equalizing the memory banks!
If the IIsi boots from the IIfx ROM SIMM in a 2MB config, it'll save me a lot of bother . . .
. . . my original, bought new, Rocket 33 that's slated to go in there already has 32MB on board right now . . .
. . . and it'll only be using the IIsi to copy its ROM into RAM, as an I/O processor, Video Card Cage & networking port.
Forgot to mention, with any luck, as an ATX PSU upgrade enclosure for itself . . .
. . . and two or three PDS Cards slung under the MoBo!
To finish up the "thread" on a Good, Bad & Ugly note:
The good: thanks ever so much for the 256k SIMMs, AichEss. Safely arrived & tested.
The Bad: I still get the 5(?) note death chime with my stock IIfx ROM and the Hacked ROM SIMM in the IIsi.
The Ugly: gotta start looking into maxing out Banks A & B with a 72 pin SIMM Hack again . . .
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