First post, by hugojpinto
Hi!
So, on a recent find I got myself a old PC XT with a dead motherboard and outer case in a pretty rough shape. I decided to scavenge some of the parts for my other machines, and found inside an AST Flashpak 8086 NEC V30 processor upgrade card, alongside with other AST expansion goodies.
I wanted to get that running on my 2nd generation XT (with 640kb onboard), but cannot. Everything works using the original 8088 setting, but in the 8086 mode the system POSTs correctly, counts and verifies memory super fast, but, alas, upon disk boot time the screen either gets garbled, or the boot process halts. It almost seems like some address or I/O corruption. I messed around with the DIP switches and things change a bit, but never to a successful boot.
I looked over half the internet for the manual this expansion card should have come with, but could not find anything.
Does anyone by any chance have a reference/manual/instructions on the switches’ meaning and settings?
Any help would be appreciated!
Thanks!
Hugo