@iz8dwf
@iz8dwf
iz8dwf | Apple IIgs disk interface issue. Substituting the IWM with a Macintosh one. @iz8dwf | Uploaded March 2022 | Updated October 2024, 2 hours ago.
Apple IIgs pcb # 8806-2. No external floppy drive was recognized. Tracked the fault to a bad IWM IC 344S0041 (PLCC 28 pins). A 344S0062 IWM from a Macintosh IIx worked fine as replacement.

Timeline:
00:00 - Welcome
00:28 - IWM troubleshooting
02:54 - IWM "options"
06:34 - Final tests

Apple IIgs schematics:
applefritter.com/files/2021/03/18/Apple%20IIgs%20schematic.pdf

Apple IWM documentation
https://brutaldeluxe.fr/documentation/iwm.html
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Apple IIgs disk interface issue. Substituting the IWM with a Macintosh one. @iz8dwf

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