Crash in ReleaseSafe and Debug

Boot ROM jumps to 0C00B500, which is only NOPs in ReleaseSafe, but actual code when compiled in ReleaseFast. Debug mode has the same issue... half of the time -.-"

Apparently something is very wrong when jumping to interrupts. Debug build before a crash:

[8C0000EA] 0010001100010010 mov.l R1,@R3         R3 =8C000F78, R1 =24486403, T=0, Q=0, M=0
[8C0000EA]             2312                      R3 =8C000F78, R1 =24486403, T=0, Q=0, M=0
[8C0000EC] 0111001100000100 add #4,R3            R3 =8C000F78, R0 =80000F7C, T=0, Q=0, M=0
[8C0000EC]             7304                      R3 =8C000F7C, R0 =80000F7C, T=0, Q=0, M=0
[00000600] 0010111100000110 mov.l R0,@-R15       R15=8C00F400, R0 =00000000, T=0, Q=0, M=0 <-- What? 
[00000600]             2F06                      R15=8C00F3FC, R0 =00000000, T=0, Q=0, M=0
[00000602] 1101000001100011 mov.l @(99,PC),R0    R0 =00000000, R6 =00000000, T=0, Q=0, M=0
[00000602]             D063                      R0 =FF000000, R6 =00000000, T=0, Q=0, M=0

R0 is reset to 0 (bank switching?). Debug build in a working run:

[8C0000EA] 0010001100010010 mov.l R1,@R3         R3 =8C000F78, R1 =24486403, T=0, Q=0, M=0
[8C0000EA]             2312                      R3 =8C000F78, R1 =24486403, T=0, Q=0, M=0
[8C0000EC] 0111001100000100 add #4,R3            R3 =8C000F78, R0 =80000F7C, T=0, Q=0, M=0
[8C0000EC]             7304                      R3 =8C000F7C, R0 =80000F7C, T=0, Q=0, M=0
[00000600] 0010111100000110 mov.l R0,@-R15       R15=8C00F400, R0 =80000F7C, T=0, Q=0, M=0
[00000600]             2F06                      R15=8C00F3FC, R0 =80000F7C, T=0, Q=0, M=0
[00000602] 1101000001100011 mov.l @(99,PC),R0    R0 =80000F7C, R6 =00000000, T=0, Q=0, M=0
[00000602]             D063                      R0 =FF000000, R6 =00000000, T=0, Q=0, M=0

R0 is used afterwards.

Senryoku / Deecy

Crash in ReleaseSafe and Debug #28