VT52 microprogram

[Mattis Lind]

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
>