Quote:
Originally Posted by mark_k
For further investigation, I thought about trying these things:
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- (Edit to add:) Check whether the problem happens in any programmed modes (EURO36, SUPER72 etc.). Also when using a programmed mode, try writing to BEAMCON0 to clear the LOLDIS bit and see whether the problem appears then.
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I tried booting to a Multiscan:640x480 Workbench. According to the WinUAE log, the system wrote 0x1B88 to BEAMCON0. WinUAE says
warning: 1B88 written to BEAMCON0 PC=00F8FFC0
(Why the warning message, out of interest?)
Anyway, with Workbench in that mode I tried writing to BEAMCON0 with the LOLDIS bit clear (so writing 0x1388). The display changed to the same state as if I had written 0x0000 to BEAMCON0. Does that happen on a real Amiga too?
Edit: I screwed up, will try some more things later.