cwathen
Experienced Member
I picked up an 8087 for my IBM 5150 since it was going cheap. Supposedly this is a NOS part but I have my doubts.
With the copro fitted the system doesn't run - not even any sync on the display. Once taken out it runs fine. I do have position 2 on SW1 set to off as per minuszerodegrees.
The original 8088 CPU was replaced with a V20 last year but I didn't expect that to make any difference.
Anything I'm missing before sending back the 8087?
With the copro fitted the system doesn't run - not even any sync on the display. Once taken out it runs fine. I do have position 2 on SW1 set to off as per minuszerodegrees.
The original 8088 CPU was replaced with a V20 last year but I didn't expect that to make any difference.
Anything I'm missing before sending back the 8087?