Hi, I am looking for ROM binaries (512k) for 8593A SA. I have a dead U23 ROM ... Anyone ?
http://ftb.ko4bb.com/getsimple/index.php?id=manuals&dir=HP_Agilent/HP_8591_8593_8594_8595_Performance_Spectrum_Analyzer Looks like the 8593A has 1MBit EPROMs?
There were at least two versions of the processor board an old version with 512k ROMs and a newer version with 1M ROMs. My board has 512k ROMs installed but it seems that it also could support 1M ROMs (there are holes for bigger ROM package). Unfortunately memory logic is programmed into a PAL chip which is different for the 1M version and 512k version and I also do not have the "firmware" for the PAL chip.... Still looking for 8593A 512k firmware ROMs dump and alternatively for a PAL dump which allows to install 1M ROMs ...
Gast
#6960819
In these threads you can find the JEDEC files for the adress decoder PALs: Beitrag "Re: Firmware to HP 8591A spectrum analyzer" Beitrag "Re: Firmware to HP 8591A spectrum analyzer" 8590-80094 is for 64k EPROMs. Machines with 128k EPROMs need 08590-80159. A GAL/PAL/PALCE/ATF 22V10 with 25 ns or faster is required.