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Showing content with the highest reputation on 03/28/24 in all areas
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In the MPS2 it's IC5 and 10, it definitely needs IC10 because as you said it controls the reel comms. Now I have found that IC5 isn't always needed and it depends on the game (some will run and some won't) so it could be the same in MPS1 (IC6)?1 point
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1. There are 2 TMS9902, can the printer port one (IC6) be taken out and used for the reel comms (IC4) or will the MPS system error due to the missing chip. 2. This chip is used in several other computing systems, I can imagine a replacement would become popular. 3. The MPS uses it for reel comms, simple serial communications BUT it does multiplex TX/RX onto a single track. I wonder if a relatively simple hack can be made to just keep this comms running. I see TX/RX are combined after the TMS9902 and split with an inverter for the TMS7041 reel CPU. MAX232 to the rescue ???1 point
