Z8530 (was Re: Strange boards in Apple//e)

From: Ethan Dicks <ethan_dicks_at_yahoo.com>
Date: Mon Nov 8 22:23:22 1999

--- Tony Duell <ard_at_p850ug1.demon.co.uk> wrote:
> THe 8530 is a complex sync/async serial chip IIRC. It's the one used in
> the Macintosh, etc.

And older Sun workstations. It's a great chip. We used to use it for
our DEC Qbus and VAXBI bisync/SNA protocol emulator boards... very fancy
stuff for classic equipment. A few gotchas like you can't access the
registers in back-to-back I/O instructions... there's some internal delays
especially on the 4Mhz parts when used with an 8Mhz MC68K CPU. I expect
that on a 6502, there's no problems, though.

Also, the ASDG Serial card for the Amiga used the Z8530 - 6Mhz and 8Mhz


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Received on Mon Nov 08 1999 - 22:23:22 GMT

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