4 Sep
2015
4 Sep
'15
8:09 a.m.
On 9/3/2015 11:50 PM, Chuck Guzis wrote:
On 09/03/2015 08:49 PM, dwight wrote:
Yup - see my other post on this topic, though I used a through-hole GAL
rather than a PLCC (the PLCC is really a good idea).
The issue with OC, though, might be what it was used for. If it was
just used for wired OR / wired AND then, yeah, your idea should work OK.
JRJ
A pal could have worked as well. Dwight
A GAL should also be useful--and maybe a bit more flexible. To emulate
the OC outputs, one can simply manipulate the output enable so that a
'1' output is High-Z and '0' is, well, '0'. I believe
individual oput
tristate control is allowed in non-registered mode for GALs. A PALCE
should also work.
A 20 pin PLCC should fit on a DIP-sized PCB.
--Chuck