2016-05-12 21:24 GMT+02:00 Mattis Lind <[email protected]>: > > > 2016-05-12 21:12 GMT+02:00 Noel Chiappa <[email protected]>: > >> > From: Mattis Lind >> >> > I also have a YF card. ... I could access the contents but it didn't >> > run very well. So either the CPU is still bad or the PROM contents >> are >> > bad. Could you please direct me to your YF dumps so I could compare? >> >> They are on my "Miscellaneous Digital Equipment Corporation PDP-11 >> Information" page: >> >> http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/PDP-11_Stuff.html >> >> in the "ROM Dumps" section. >> > > Perfect! I'll have a look. > > >> >> > If you also have done a disassembly that would be very interesting. >> >> I haven't completely disassembled the -YF version, but the -YA is almost >> all >> done, so it should help. >> >> Let me know if you need to have the -YF fully disassmbled & commented, and >> I'll hop to it. >> > > Very kind offer. It would be very nice with a listing if you have the time! >
I checked the contents in the machine versus your listing. Two locations have the high bit set for some reason, 165020 read 100501 and 165032 reads 106303. Trying to run halts the machine with 165102 in the front panel. Single stepping it it will step to 165106 but become non-responsive with the lights at 165106. I think this is because it had a bus fault. If I press START it will clear it up. So for now, it is not necessary with more disassembly. Unless you have som spare time of course. The fault occur in the lines which you already have done... You don't have a dump of the PROMs in Intel HEX? I need to reprogram a new chips since one seems to be failing. /Mattis
