On 2014-08-25 at 08:35:22, Gerrit Heitsch (gerrit@laosinh.s.bawue.de) wrote: > >> wrote: > >> > >>> Also, this still doesn't explain why the 6570-036 works in my Amiga > >>> keyboard while the 6571-036 doesn't, and the ROM dump results in > >>> identical files. Did someone look at the dump to see if it looks like > >>> code for a keyboard controller? It does a checksum test at power up. > >> > >> I know it's a long shot, but maybe your 6571-036 is kind of broken in > >> a way, which still allows enough functionality to do what Jim did to it? > > > > Remember what Jim said happenned when he tried to use the dumper-in-RAM > > method: > > > > > 6570 would generate a bunch of 0xff, but the 6571 gave me nothing. > > > > Maybe, the 6571's RAM has failed. > > There is a blink code for failed RAM though. True. Yet we can imagine situations where this wouldn't work, can't we? As I mentioned on the beginning - it's a long shot but as long as the pinout and the ROM code are the same - what else? Maybe some I/O port bits (which Jim didn't use)? -- SD! Message was sent through the cbm-hackers mailing listReceived on 2014-08-26 17:00:02
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