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Old 18 June 2021, 08:19   #3
Rock'n Roll
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Join Date: Aug 2018
Location: Drübeck / Germany
Age: 47
Posts: 30
Thanks, StingRay. It works.

I put a memwatchpoint:
>w 0 0 80000 none

then:

Code:
Breakpoint 0 triggered.
  D0 00000000   D1 00000001   D2 00000001   D3 00000000
  D4 00000000   D5 00000000   D6 00000000   D7 00000000
  A0 00000000   A1 00000000   A2 00000000   A3 00000000
  A4 00000000   A5 00000000   A6 00000000   A7 00C63400
USP  00C63400 ISP  00C64400
T=00 S=0 M=0 X=0 N=0 Z=0 V=0 C=0 IMASK=0 STP=0
Prefetch 6202 (Bcc) 9401 (SUB) Chip latch 00000000
00023B3E 9401                     SUB.B D1,D2
Next PC: 00023b40
>g
SMC at 00023B40 - 00023B41 (1) from 00023B46
Cycles: 41 Chip, 82 CPU. (V=105 H=36 -> V=105 H=77)
  D0 00000000   D1 00000001   D2 00000001   D3 00000000
  D4 00000000   D5 00000000   D6 00000000   D7 00000000
  A0 00000000   A1 00000000   A2 00000000   A3 00000000
  A4 00000000   A5 00000000   A6 00000000   A7 00C63400
USP  00C63400 ISP  00C64400
T=00 S=0 M=0 X=0 N=0 Z=0 V=0 C=0 IMASK=0 STP=0
Prefetch 6302 (Bcc) 9401 (SUB) Chip latch 00000000
00023B3E 9401                     SUB.B D1,D2
Next PC: 00023b40
>d 23B40 1
00023B40 6302                     BLS.B #$02 == $00023b44 (F)
>
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