tsakogia@uk.ac.man.cs (George Tsakogiannis) (05/01/91)
This message is sent on behalf of Pakis Haliapas (haliapap@p4.cs.man.ac.uk):
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Does anybody out there know why when I compile the following program
(with HiSoft's GenST assembler) and run it on my STE the system crashes?
-------------------------
start
bra real_start
even
TimerA_int
rte
even
real_start
clr.l -(sp)
move.w #$20,-(sp)
trap #1
addq.l #6,sp
move.l d0,old_sp
move.l #TimerA_int,$134
move.b #128,$FFFA1F
or.b #$07,$FFFA19
or.b #$20,$FFFA07
or.b #$20,$FFFA13
move.l old_sp,-(sp)
move.w #$20,-(sp)
trap #1
addq.l #6,sp
loop1
move.w #2,-(sp)
move.w #1,-(sp)
trap #13
addq.l #4,sp
cmp.w #-1,d0
bne loop1
move.w #2,-(sp)
move.w #2,-(sp)
trap #13
addq.l #4,sp
clr.w -(sp)
trap #1
cl_counter dc.l 0
old_sp dc.l 0
-------------------------
The following program does exactly the same thing too:
-------------------------
start
bra real_start
even
TimerA_int
rte
even
real_start
move.l #TimerA_int,-(sp)
move.w #128,-(sp)
move.w #7,-(sp)
move.w #0,-(sp)
move.w #31,-(sp)
trap #14
add.l #12,sp
loop1
move.w #2,-(sp)
move.w #1,-(sp)
trap #13
addq.l #4,sp
cmp.w #-1,d0
bne loop1
move.w #2,-(sp)
move.w #2,-(sp)
trap #13
addq.l #4,sp
clr.w -(sp)
trap #1
cl_counter dc.l 0
old_sp dc.l 0
-------------------------
Send any answers/comments/suggestions to
haliapap@p4.cs.man.ac.uk
or to this net
Thank you in anticipation,
Pakis Haliapas,
Manchester.