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NAME
- Debug
-
run the system debugger
SYNOPSIS
Debug(flags)
void Debug(ULONG);
D0
FUNCTION
This function calls the system debugger. By default this debugger is "SAD" in V39 and V40, and "ROM-WACK" otherwise, including V45 and above. Other debuggers are encouraged to take over this entry point (via SetFunction()) so that when an application calls Debug(), the alternative debugger will get control. Currently a zero is passed to allow future expansion.
NOTES
The Debug() call may be made when the system is in a questionable state; if you have a SetFunction() patch, make few assumptions, be prepared for Supervisor mode, and be aware of differences in the Motorola stack frames on the 68000,'10,'20,'30,'40 (etc.)
BUGS
In ROMWack, calling this function in SUPERVISOR state would have caused the a5 register to be trashed and the user stack pointer to be trashed. exec/Alert() also trashed d7, and the dos.library exception hook trashed all other registers. Also, ROMWack could not recover in case the VBR of the 68010 or beyond moved.