On 6/26/21 8:27 PM, Mike Naberezny wrote: > On 6/21/21 10:58 PM, Gerrit Heitsch wrote: >> If it's in fact a 6500/1 then the firmware should be dumpable using >> the same method as was used for the Amiga keyboard controller and the >> 1520 plotter. > > It worked. It is now confirmed that the "VIC-42" is a MOS 6500/1. > > The dump can be downloaded from my page: > http://mikenaberezny.com/hardware/c64-128/alphacom-vp42-printer/ > > I haven't done a complete disassembly of it, but I did check the dump by > following the reset vector. It leads to 6502 code that starts by > clearing decimal mode and setting the stack pointer, as one would expect. Lets see if this is really only 2 KB or if MOS also had a version with more ROM. The code will tell. GerritReceived on 2021-06-26 22:00:02
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