Quote:
Originally Posted by amilo3438
Work For Nothing (Demo) by Turnips
A500 ECS 1mb ... some glitches pic.1, pic.2 , and strange line pic.3 !!!
(Note: It happens the same also on AGA 1200 ... hm, maybe the dms is damaged ?!)
|
A500 confirmed. Yeah, most likely damaged file.
This is emulation bug, copper emulation timing is wrong (it is too slow in this situation). Needs some logic analyzer testing..
EDIT: It is caused by weird copper feature, special/dummy copjmp second cycle disappears if it would cross scanlines (=it would be positioned immediately after first strobe/refresh slot)
It is.
Quote:
Originally Posted by amilo3438
|
It does not set color register number 15 and apparently it is full white after power up, at least if Denise is ECS version. A1000 (8362R6 Denise) shows it as black so A500 OCS Denise most likely does the same. (Color registers are inside Denise chip)
It is demo bug, chipset register contents after power up are not be guaranteed, but I still "fix" it.
Of course color is also wrong if any program, for example demo pack menu is run and it uses color 15.