On 08/20/2014 04:56 PM, Martin Hoffmann-Vetter wrote: >> >> If a 6571R6PD (with part number 315107-01) is labeled with a sticker as >> 6571-036 with the part number 328191-02, so it must be interchangeable. If >> the 6570 is mask programmable, does the 6571 real programmable after >> production? Is the part number 315107-01 for an empty 6571? No, it could just mean that the people who packaged the Chip printed the wrong label on it. Remember, MOS made the dies and only packaged a small number of them, the rest was shipped to different manufacturers around the world and packaged and labeled there. To find out where a certain MOS IC was packaged, look on the underside. I have seen a photo showing a C64 board where the VIC had such a paper label on it. Unfortunatly, never found out what was written under it. 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. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2014-08-24 18:00:03
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