| Re: [hatari-devel] 68020 addressing modes not correctly disassembled |
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- To: hatari-devel@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [hatari-devel] 68020 addressing modes not correctly disassembled
- From: Christian Zietz <czietz@xxxxxxx>
- Date: Sun, 21 Jun 2020 13:26:27 +0200
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Thorsten Otto schrieb:
> while investing some bug, i found that 68020 addressing modes are not
> disassembled correctly.
> Eg. the opcode sequence
> 0x4eb0,0x01f1,0x0013,0x5b82
> should be disassembled to
>
> [0013122a] 4eb0 01f1 0013 5b82 jsr ([$00135B82])
>
> but actually yields
>
> $0013122a : 4eb0 DC.W $4eb0
>
> $0013122c : 01f1 0013 bset d0,$13(a1,d0.w)
>
> $00131230 : 5b82 subq.l #5,d2
Works for me, Hatari from latest Git sources, actually with *both*
disassemblers:
UAE disassembler:
czietz@NotebookHP:~/hatari$ ./src/hatari.exe --cpulevel 2 -D --disasm uae
INFO : Exception debugging enabled (0x203).
Selected UAE CPU core internal disassembler.
INFO : Hatari v2.2.1, compiled on: Jun 16 2020, 08:35:10
INFO : GEMDOS HDD emulation, C: <-> C:\Temp\atari.
Bus error exception at 0xe00086!
----------------------------------------------------------------------
You have entered debug mode. Type c to continue emulation, h for help.
CPU=$e00086, VBL=0, FrameCycles=159, HBL=0, LineCycles=159, DSP=N/A
00E00086 4a78 8006 TST.W $8006
> w w $20000 0x4eb0 0x01f1 0x0013 0x5b82
Wrote 4 'w' values starting from 0x20000.
> d $20000
00020000 4eb0 01f1 0013 5b82 JSR ([$00135b82]) == $00000000
External disassembler:
czietz@NotebookHP:~/hatari$ ./src/hatari.exe --cpulevel 2 -D --disasm ext
INFO : Exception debugging enabled (0x203).
Selected external disassembler.
Disassembly output flags are 15.
INFO : Hatari v2.2.1, compiled on: Jun 16 2020, 08:35:10
INFO : GEMDOS HDD emulation, C: <-> C:\Temp\atari.
Bus error exception at 0xe00086!
----------------------------------------------------------------------
You have entered debug mode. Type c to continue emulation, h for help.
CPU=$e00086, VBL=0, FrameCycles=159, HBL=0, LineCycles=159, DSP=N/A
$00e00086 : 4a78 8006 tst.w $ffff8006.w
> w w $20000 0x4eb0 0x01f1 0x0013 0x5b82
Wrote 4 'w' values starting from 0x20000.
> d $20000
$00020000 : 4eb0 01f1 0013 5b82 jsr ([$135b82])
Regards
Christian
--
Christian Zietz - CHZ-Soft - czietz@xxxxxxx
WWW: https://www.chzsoft.de/
PGP/GnuPG-Key-ID: 0x52CB97F66DA025CA / 0x6DA025CA