2017-12-05 16:51 GMT+01:00 Mike Loewen via cctalk <cctalk@classiccmp.org>:
> On Tue, 5 Dec 2017, Mattis Lind wrote: > > 2017-12-05 16:26 GMT+01:00 Mike Loewen via cctalk <cctalk@classiccmp.org>: >> >> On Tue, 5 Dec 2017, Mattis Lind via cctalk wrote: >>> >>> While going through the HP2640B I found two boards which I cannot find >>> >>>> relevant schematic and description for, the 02640-60009 Display Memory >>>> Access Module and the 02640-60088 Display Timing Module. Anyone has more >>>> info on these? >>>> >>>> >>> The manual for the 02640-60088 is here: >>> >>> http://www.hpmuseum.net/document.php?hwfile=2542 >> >> Looking more into this document revelas that it covers three boards 02640-60009, 02640-60088 and 02640-60112. Now I had the idea of dumping the character ROM as well. But what is a AMD 27S82? I cannot really find a datasheet online. From the schematics above it looks not too much off from standard 2716 EPROM with pin 19 (A10) as E3 , pin 21 (VPP) as /E1. But my Data I/O 29B does not seem to be compatible with 27S82 and as pin 21 is active low it gives that a 2716 setting in the programmer (reader) won't work. Does the 27S82 have any equivalents that I could look up instead in the device list? > >>> >> >> Thanks! Those numbers fooled me. Some time the number seems to correspond >> a >> bit between the number on the board and some times not. >> > > The Data Terminal Technical Information Package contains a > cross-reference for PCAs and Module numbers. Unfortunately, it doesn't > list the 02640-60009. > > http://www.hpmuseum.net/document.php?hwfile=2541 > > > > Mike Loewen mloe...@cpumagic.scol.pa.us > Old Technology http://q7.neurotica.com/Oldtech/ >
