Atari 800xl Black screen. All chips except ROMs tested
Thanks in advance for reading. I've followed a bunch of guides on the site for my XL with black screen (USB powered). All ram, 74xx 40xx and custom chips test okay in my Backbit Chip tester. The only 2 chips I can't test are the 2 roms. I have another 800xl that works, but of course, those are the only 2 non-socketed chips on there.
Is there a way to test those 2 roms before I start going farther? I was reading that I can replace the OS rom with a 27c128. Is that true? Then just use th
The smaller 24 pin ROM is 8KB Atari BASIC and can be removed as @kheller2 advised.
For an Atari XL a Rev. 2 or 3 ROM is often the default. Please find the Rev. 3 image attached.
Atari OS Rev. 3 {29F133F7}.rom