22 Apr
2004
22 Apr
'04
5:41 a.m.
David V. Corbin wrote:
Cira 1976 I developed a custom (wirewrap) interface
between a Selectric 731
and the original TRS-80 model I.
Could only get 9.5 chars per sec out of it though....
Still have the board in my boxes of old sentimental stuff..
In the late 1980's I got a the selectric console typewriter off a
scrapped IBM-1130. In my attempts to get it to work with a Z80
single board computer I distroyed the machine by running it open
loop at about the same IO speed. To take my advice and run it
closed loop with carefull notice of all the timing involved.
While the I don't have the docs ( or any other stuff ) looking
for the console prints and schematics from the IBM-1130 may be
usefull in giving ideas on how to run the beast.