Ok cheers. I have no display and found that the en signal from the 6845 is constantly low. I have swapped the 6845, 6502, ic 29, 24, 26,20 and the is rom.it appears that the crtc and en goes high signal appears on switch on and then disappears. I have removed ic 3 but still no rgb signals are generated due to the en being low from the 6845 I am beginning to think it is a timing issue but only have a single channel scope.
Statistics: Posted by Chief392 — Wed Jan 28, 2026 10:53 am