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IFF Interleaved Bitmap Image  |  2000-05-27  |  15.0 KB  |  700x568  |  1-bit (2 colors)
   ocr: A2286 JUMPER MODIFICATION Problems: - 1) Keystrokes are lpst when A2286<->Amiga communication is taking place (fake disk i/o, JLINK, AREAD, AWRITE, ..). 2) Fake disk i/o, JLINK drives, AREAD, AWRITE are very slow. Cause: Decoding of pc i/o addresses around 06xH is incomplete, resulting in the 8042 getting acceased whenever the PC sends an interrupt to the Amiga. This causes any keys being processed by the 8042 to get lost/corrupted, and causes a spurious key-pressed interrupt (IRQ 9) which eats up a lot of CPU time. Fix: Only attempt this is if you know how to deal with soldering to IC pins wi ...