• Please review our updated Terms and Rules here

Turbo XT BIOS problem

elektrownik

Member
Joined
Oct 21, 2013
Messages
22
Location
Warsaw, Poland
Hello, I have 5160 clone with two sockets (one for ROM, another, empty for BASIC). I downloaded Turbo XT BIOS 3.1 and selected to include IDE, FDD and BASIC ROMs. Im using two AT28C256 chips and I managed to run pure Turbo XT BIOS but it is showing that there is no BASIC ROM, also IDE and FDD BIOSs seams not to start. Previusly I used IDE XT BIOS on option ROM on LAN card and it was working. When I open ROM images (u18.rom and u19.rom) it seams fine, as I understand first 24KB on U18 is BASIC (3/4 of it) and last 8KB Turbo XT BIOS which works, in U19 last 8KB is 1/4 (first part) of BASIC and Turbo XT BIOS should look for BASIC there. First 24KB on U19 is FDD and IDE. I checked and U19 sockets is getting 5V power and I can read and write AT28C256 for U19. So the question is what could be the problem here?
 
Never mind, it was little pin incompatibility and BIOS socket was for 27c64 (missing address line). I fix it and it works now.
20201020213844_5f8f3d302c945.jpg
 
Back
Top