Hey all...
I recently received an SFD-1001 with drive select switches. I went poking
around inside the drive and found some things I don't quite understand. I
noticed that the SFD-1001 has no less than TWO 6502 processors. One on the
main board, and another on a small daughterboard above the main board. In
addition, the main board has two 6532s (for the iEEE-488 bus, I expect), but
the daughterboard also has a 6522 near the 6502, and two other chips
besides, marked 251257-02a, and 901885-04. One is a 24pin 2k eeprom.
I'm curious about a couple of things: whats the 6522 for? Why does a
single drive need two 6502s, and why the daughterboard?
- Bo
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