13 Aug
2001
13 Aug
'01
9:08 a.m.
Does anyone have any technical documentation for a Hazeltine 1500? I just
plugged mine in, and it seems that I have some problems. I'm getting cap.
O's in the top half of the display, and overtyping does not always produce
the proper character. Everything's fine on the bottom half of the screen.
I'm thinking I have a bad RAM chip. Looking at the board, it's an 8080 with
IIRC 21L02's for RAM. I don't own a logic analyzer, and haven't correlated
the ASCII codes to see what bit's are stuck.
Any help would be appreciated.
Gary