memory watchpoints

[jotd]

Toni hinted at the fact that it's possible to use watchpoints for other chips than CPU

It seems to be the case, but it's not documented in the help which is a pity, you have to check the source to find the identifiers:

https://github.com/tonioni/WinUAE/blob/master/debug.cpp

>w 0 $200 1
 0: 00000200 - 00000200 (1) RWI CPU
>w 0 $200 1 BLT
 0: 00000200 - 00000200 (1) RWI BLT

first watchpoint is "classic" read/write from CPU, but second watchpoint watches read/write from blitter. There's also a wider "DMA" type, and "AUD". You can also specify which blitter source you want (BLTD)...

On the other hand, I have some change that I'm sure the blitter does and the blitter watchpoint doesn't detect it.

[Rock'n Roll]

I have tested it and for me it works better than I expected.

>w 1 $10508 10 BLT
 1: 00010508 - 00010517 (16) RWI BLT
>g
Memwatch 1: break at 00010508.W  W  00000000 PC=0002A718 BLTDN (000)
Blitter registers at start:
PT A=00019BC0 B=00001004 C=0000E348 D=00010508
CON0=0100 CON1=0000 DAT A=0000 B=FFFF C=8000
AFWM=FFFF ALWM=FFFF MOD A=0000 B=FFF8 C=004C D=0000
COP=0 PC=0002A710
Blitter registers now:
PT A=00019BC0 B=00001004 C=0000E348 D=0001050A
CON0=0100 CON1=0000 DAT A=0000 B=FFFF C=8000
AFWM=FFFF ALWM=FFFF MOD A=0000 B=FFF8 C=004C D=0000
PC=0002A720 DMA=1
Cycles: 9 Chip, 18 CPU. (V=80 H=105 -> V=80 H=114)
VPOS: 080 ($050) HPOS: 117 ($075) COP: $0001ede4
...