2020-11-22 10:17:14 +08:00

15 lines
673 B

; A snippet that you can INCLUDE directly, to invoke MicroBug at early boot,
; when otherwise you would get a Sad Mac. Trick is to init the Event Queue.
; Expect 8 bytes of unfamiliar stuff on the stack and some clobbered regs.
; If you use this as a function, don't forget to RTS!
move.w #20,d0 ; number of events
dc.w $A06D ; _InitEvents
move.l $2BA,-(SP) ; save DSAlertTab
move.l #-1,$2BA ; because it needs to be nonzero
move.w #13,d0 ; as if we called _Debugger while it was unimp
dc.w $A9C9 ; _SysError
move.l (SP)+,$2BA ; restore DSAlertTab