Quote:
Originally Posted by ortek_service
Yes, for DRAM's it's a bit more involved and important to know which bit is at fault. But I recall Slothie saying his code didn't support DRAM PET's at present, due to extra complexity of doing this on a PET (Which presumably doesn't have hardware-based refreshing, which computers with CRTC's / ULA's have that does this for you)
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If the DRAM refresh is hardware then the diagnostic will work. From memory I beleive the DRAM refresh is tied into the video logic, so if the screen is at all stable then that would imply a high chance the DRAM refresh is working. I don't think the DRAM PETs need any specific software support, unless there are hardware registers that need initialising (e.g in CRTC PETs) However I recall Colin saying his PET doesn't have a CRTC?