14 Mar
2007
14 Mar
'07
3:41 p.m.
On Mar 14, 2007, at 6:21 PM, Ethan Dicks wrote:
I don't know lots about all vendors, but in the
DEC world of
terminals, they used 8-bit microprocessors for the VT100 through the
VT241. I _think_ the VT100-family uses an 8080, and the VT220 and
VT240/241 _might_ use a Z80, but they also might use an 8085. Any of
those terminals would be candidates to snarf ROM images, but one would
need to know memory maps, ROM bank select schemes, how font ROMs tie
into the video circuit, etc., first, but these are all knowable
quantities.
The VT100 uses an 8085, FYI. I don't recall what the VT220/VT240
use.
I have pretty much all of the DEC microprocessor-based terminals.
Do you think it'd be a good idea for me to, over time, pull them out
and read their ROMs for archival or reconstructive purposes?
-Dave
--
Dave McGuire
Port Charlotte, FL