CGA cold boot
Opened this issue · 4 comments
Cold booting the machine with the onboard VGA disabled and an IBM CGA card, no output is displayed on the monitor. If I wait a bit and reset, the machine boots correctly with CGA output. If I try to reset too quickly I get no output, so maybe the CGA card just hasn't had enough time to initialize?
Weird. I've actually tested my Micro 8088 (not a NuXT) with CGA, and it works properly as long as I have the DIP switches set correctly. If the switches are not set correctly, for example they set to "VGA/EGA/None" instead of CGA 40x25 or CGA 80x25, it will show garbled text on the screen. Not sure the on-board VGA (although disabled) somehow interferes with CGA.
Interesting. Even weirder, mine actually works fine with the onboard VGA enabled, and doesn't exhibit the cold boot problem.
I can confirm this problem. Booting the NuXT with an ATi Small Wonder rev 2 doesn't display anything, though the monitor is clearly driven (screen is black, as opposed to white when not driven). I have to wait about 10 seconds, then warm reboot for the CGA to work.
This is exact the same issue, which i have on my Micro8088:
skiselev/8088_bios#73 (comment)