On Fri, May 1, 2020 at 2:18 AM Al Kossow via cctalk <[email protected]> wrote: > > On 4/30/20 2:55 PM, Josh Dersch wrote: > > > It is, I refoamed mine for VCFPNW last year. I can take internal pictures > > if it'd help anyone out. > > > > - Josh > > > > can you dump the firmware? or was that already done for the PERQ emulator? > it should be some flavor of 8048
The PERQ 1 keyboard uses a semi-custom encoder IC labelled AY-3-4592. I suspect there is a mask ROM inside that gives the key mapping and that it was used in other keyboards as there's a PROM (74S477) between the outputs of that encoder and the PERQ. I have a dump of that PROM, it's in the archive of PROMs/PALs that I sent to somebody yesterday. The PERQ 2 keyboard is a standard-ish Keytronics thing with a serial output. That does have a ROMless microcontoller (8035?) in it, again I've dumped the firmware ROM. -tony > >
