3 Oct
2008
3 Oct
'08
7:06 p.m.
Would anyone have a service manual for the Hazeltine 1410 terminal ?
I have a peculiar problem where several keys output a different
character. I found there's a pattern to this chaos. From looking at the
ascii data, bits 5 and 6 become swapped only for characters between 40h
and 5Fh. instead of an 'A' it displays a '!" and it continues like
this. I'm afraid the i8243 chip might be bad but I'm not completely
sure. I found the i8243 datasheet and currently trying to trace the
connections. I hear this chip is hard to come by. I only found one
supplier so far which I'm waiting to hear back on the rfq.
thanks
=Dan
--
[ Pittsburgh 250th --- http://www2.applegate.org/~ragooman/ ]