9 Mar
2018
9 Mar
'18
2:44 a.m.
2018-03-09 10:47 GMT+01:00 Lars Brinkhoff via cctalk <cctalk at classiccmp.org>
:
Hello,
Does anyone have VT52 microprogram ROM image, a listing, or a copy
of "DECscope System Manual"?
I did dump the microprogram of my VT52. I also did a very crude first
attempt to disassemble it. Since the VT52 has a mode bit that control what
operation to run it has to be simulated to get it right. You find
everything here: http://www.datormuseum.se/home/dec-vt5x
I had a plan to run the VT52 with a logic analyzer attached to recover
traces of what it is doing for a keypress, UART in, scanline etc.
/Mattis
Best regards,
Lars Brinkhoff