copperlist disassembly bug

jotd · 14 January 2023, 13:38

Winuae 4.10.0

copperlist is basically a succession of change color 0 then wait 8 lines

winuae copper emulation works well but disassembly is completely bogus. Copperlist disassembly derails after a while.

Code:

>m 49C 1
0000049C 0180 0004 3401 FFFE 0180 0004 3C01 FFFE  ....4.......<...

write color, wait, write color wait, ok

Code:

>o 49c
 0000049c: 0801 fffe [008 018]  ;! Wait for vpos >= 0x08 and hpos >= 0x00
                                ;  VP 08, VE 7f; HP 00, HE fe; BFD 1
 000004a0: ffff fffe [122 00c]  ;! Wait for vpos >= 0xff and hpos >= 0xfe
                                ;  VP ff, VE 7f; HP fe, HE fe; BFD 1
                                ;  End of Copperlist
 000004a4: 0801 fffe [008 024]  ;! Wait for vpos >= 0x08 and hpos >= 0x00
                                ;  VP 08, VE 7f; HP 00, HE fe; BFD 1
 000004a8: ffff fffe [122 00c]  ;! Wait for vpos >= 0xff and hpos >= 0xfe
                                ;  VP ff, VE 7f; HP fe, HE fe; BFD 1
                                ;  End of Copperlist
 000004ac: 0801 fffe [008 030]  ;! Wait for vpos >= 0x08 and hpos >= 0x00
                                ;  VP 08, VE 7f; HP 00, HE fe; BFD 1

what???

Toni Wilen · 14 January 2023, 14:17

That means copper list was different when it was executed. If copper timing information is enabled ("od" command), it also stores copper data and copper disassembly shows stored data.

"!" = data is different now than it was when copper executed this instruction.

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14 January 2023, 14:17	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,503	That means copper list was different when it was executed. If copper timing information is enabled ("od" command), it also stores copper data and copper disassembly shows stored data. "!" = data is different now than it was when copper executed this instruction.

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