20 Feb
2013
20 Feb
'13
10:27 a.m.
On Wednesday (02/20/2013 at 09:04AM -0500), Allison wrote:
There is no baudot TTY option its a 20ma serial loop option commonly
used for the asr33.
There is for sure a BAUDOT monitor prom option for the 680b.
As you can see here,
http://www.vintagecomputer.net/MITS/680/MITS_Altair_680b_Monitor_Manual.pdf
the table of contents refers you to page 31, where the BAUDOT listing
is present.
The current loop interface in the 680b was capable of operating at 60mA,
with a BAUDOT teletype such as Model 28 as long as the loop supply was
externally provided.
Chris
--
Chris Elmquist
Also,
anyone know where I can get the ROM files for a 680b?
What you have to set the
terminal to depends on the jumper
settings on the board. It also depends on the monitor itself -
there is an ACIA version which can work with 9600 8n1, but there
is also a Baudot TTY version.