On 08/26/2014 06:07 PM, firstname.lastname@example.org wrote: > On 2014-08-25 at 08:35:22, Gerrit Heitsch (email@example.com) 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)? Somewhere in my collection I have another 6571-036 (same paper sticker), when I find it, I'll try it in the keyboard. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2014-08-26 17:00:38
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