> Right, that's what's confusing me. I can't work out what you could possibly > be cabling to, on the new CPU board! > > Those two connectors on the M7859 are used only with the 11/34, not the > 11/04 > (the cable from the M7859 to the programmer's front panel must be there, > with > both); they are there for the micro-code single-stepping function on the > 11/34, etc. (One cable carries uclock, the other uPC data.)
Actually it should work with the 11/04. The 04 does have one 10 pin connector on the board. Have a look in the manual. Page 7-1. http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp11/1134/KY11-LB_MaintMan.pdf > Since the new CPU probably doesn't have that ability (on the LSI-11 and > F-11 > chipsets, the micro-word bus is accessible outside the chips, but AFAIK the > same is not true of the J-11), I'm not at all sure what those two > connectors > might be. > > Perhaps they are serial lines using the 'new' DEC standard pinout, which > also > use 10-pin headers? As far as I can see there are no RS-232 level tranceivers neither any UARTs on the board but I might be wrong. Some chips are hard to read. On the other hand there are a bunch of 74S381 / 74S182. Curious of what kind of arithmetic they are performing. /Mattis > Noel >
