So I gave it a try and not sure if I am using the debugger correctly (I am mainly used to the FS-UAE debugger).
Load my game with uaedbg game.exe
A console windows shows a bunch of Allocation messages, then debugger appears at the entry point to my program - I hit "g" and game starts.
Menu system runs ok, then when I start the game the debugger breaks on my vblank wait routine on the access to $dff004/VPOSR, PC/A7 etc all seems to be in a valid segment range from "seg"
Code:
D0 A3000003 D1 00000000 D2 00000000 D3 00000000
D4 00000000 D5 00000001 D6 00000000 D7 00000000
A0 700FA698 A1 00000000 A2 00000040 A3 7005FCE0
A4 700080EC A5 700FA658 A6 700C10D4 A7 70180848
USP 70180848 ISP 07802288 SFC 00000000 DFC 00000000
CACR 00002111 VBR 00000000 CAAR 00000000 MSP 00000000
T=00 S=0 M=0 X=0 N=1 Z=0 V=0 C=0 IMASK=0 STP=0
0: FFFF-7FFFFFFF-FFFFF800 +nan FFFF-7FFFFFFF-FFFFF800 +nan
2: FFFF-7FFFFFFF-FFFFF800 +nan FFFF-7FFFFFFF-FFFFF800 +nan
4: FFFF-7FFFFFFF-FFFFF800 +nan FFFF-7FFFFFFF-FFFFF800 +nan
6: FFFF-7FFFFFFF-FFFFF800 +nan FFFF-7FFFFFFF-FFFFF800 +nan
FPSR: 00000000 FPCR: 00000000 FPIAR: 00000000 N=0 Z=0 I=0 NAN=0
700080F0 [0000E8] 2039 00df f004 MOVE.L $00dff004,D0
Segment 1: 000003e9 70008000-70060047
700080F6 [0000EE] c0bc 0001 ff00 AND.L #$0001ff00,D0
Next PC: 700080fc
seg
Segment 1: 000003e9 70008000 - 70060047 (360520)
Segment 2: 000003ea 70068100 - 700c3efb (376316)
Segment 3: 400003ea 700cbf00 - 700cc79b (2204)
Segment 4: 000003eb 700d4800 - 700fb44f (158800)
Segment 5: 400003eb 70103500 - 70176817 (471832)
Segment 6: 0000ffff 7017e900 - 701808ff (8192)
d 700080eC
_hw_waitVerticalBlank:
700080EC [0000E4] 48e7 8000 MOVEM.L D0,-(A7)
700080F0 [0000E8] 2039 00df f004 MOVE.L $00dff004,D0
700080F6 [0000EE] c0bc 0001 ff00 AND.L #$0001ff00,D0
700080FC [0000F4] b0bc 0001 2d00 CMP.L #$00012d00,D0
70008102 [0000FA] 66ec BNE.B #$ec == $700080f0 (T)
70008104 [0000FC] 2039 00df f004 MOVE.L $00dff004,D0
7000810A [000102] c0bc 0001 ff00 AND.L #$0001ff00,D0
70008110 [000108] b0bc 0001 2d00 CMP.L #$00012d00,D0
70008116 [00010E] 67ec BEQ.B #$ec == $70008104 (F)
70008118 [000110] 4cdf 0001 MOVEM.L (A7)+,D0