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"nospam" a écrit dans le message news:
...
DaveC wrote:
Is the 8279 a one-time programmed device?
No, it is just a peripheral with some registers to 'program' its function.

Hi all
It's true. 8279 is "programmed" at the boot of the CPU by the program. It was
used to interface the keyboard.

I remember to have designed a system, at the same period, with the same
components. The board using this ICs serie was the CPU, and should contain the
eproms with the program.

I suppose the board is not a standalone, but one of the many boards the system
was made of. You should find I/O boards, probably a 7 segment LED display, push
buttons simplified keyboard, battery saved RAM...

--
Guy Pastuzak

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