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move #14,D0 Display string
lea prompt1,A1
trap #15
move #4,D0 Input num1 to D1
trap #15
move.l D1,-(SP) push num1 to stack
move.l D1,D4 move num1 to keep
move.l #300,D2 Upper limit
cmp D1, D2 Compare user input to upper lim
bhi Second
blo Error1
Second:
move #14,D0 Display string
lea prompt2,A1
trap #15
move #4,D0 Input num2
trap #15
move.l D1,-(SP) push num2
move.l #0,-(SP) make room for sum on the stack
move.l D1,D5 move num2 to keep
move.l #300,D2 Upper limit
cmp D1, D2 Compare user input to upper lim
bhi MoveOn
blo Error2
MoveOn:
*add
bsr Adder
move.l (SP)+,D1 pull sum, D1 = sum
lea (8,SP),SP clean up stack
move #14,D0 Display string
lea result1,A1
trap #15
move #3,D0
trap #15
bsr newLine
move.l D4,-(SP) push num1 to stack
move.l D5,-(SP) push num2 to stack
*multiply
bsr Multiplier
move.l (SP)+,D1 pull product, D1 = prod
lea (8,SP),SP clean up stack
move #14,D0 Display string
lea result2,A1
trap #15
move #3,D0
trap #15
SIMHALT ; halt simulator
Error1:
move #14,D0
lea error,A1
trap #15
move (SP)+,D3 Pull incorrect num1 from stack
bsr newLine
bra First
Error2:
move #14,D0
lea error,A1
trap #15
move (SP)+,D3 Pull incorrect num2 from stack
bsr newLine
bra Second
*----------------------------
offset 4+4
sum ds.l 1
num2 ds.l 1
num1 ds.l 1
org *
Adder
link A0,#0 create stack frame
move.l (num1,A0),D0
add.l (num2,A0),D0
move.l D0,(sum,A0)
move.l (SP)+,D0
unlk A0
rts
*----------------------------
offset 4+4
prod ds.l 1
num4 ds.l 1
num3 ds.l 1
org *
Multiplier
link A0,#0 create stack frame
move.l (num3,A0),D0
mulu (num4,A0),D0
move.l D0,(prod,A0)
move.l (SP)+,D0
unlk A0
rts
newLine
movem.l d0/a1,-(SP) push d0 & a1
move #14,d0 task number into D0
lea crlf,a1 address of string
trap #15 display return, linefeed
movem.l (SP)+,d0/a1 restore d0 & a1
rts return
* Put variables and constants here
prompt1 dc.b 'Sláðu inn fyrri tölu: ',0
prompt2 dc.b 'Sláðu inn seinni tölu: ',0
error dc.b '** Tala er ekki á réttu bili, reyndu aftur **',0
result1 dc.b 'Summa talnanna er: ',0
result2 dc.b 'Margfeldi talnanna er: ',0
crlf dc.b $d,$a,0
END START ; last line of source
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