2 Jun
2000
2 Jun
'00
2:53 p.m.
The "right answer" (as told to me by a genius h/w type) was to use a single
PAL and a Z8030 - you actually would win by having address lines for all of
the chips registers; you had to demux the AD wires, tho.
-Mike
On Fri, 2 Jun 2000, Tony Duell wrote:
[Z8530]
I will admit that it is not friendly to the MC68K
bus. We used one or two
dedicated PALs to handle the interfacing. Additionally, we had an 8Mhz CPU
It's not that unfriendly. The PERQ 3a uses half a dozen TTL chips to
fiddle with the 60800 bus signals and turn them into the Z8530 read and
write signals. And one output of a PAL as the address decoder. That's
hardly 'unfriendly'...
-tony