10 ;
20 NUM1 = $CB
30 NUM2 = $CD
40 DIFF = $CF
50 ;
60  *=$4000
70 ;
80  CLD
105  LDA #$0A
110  STA NUM; STORE LOW BYTE 1ST NUM
120  LDA #$00
130  STA NUM1+1; STORE HIGH BYTE OF 1ST NUM
140  LDA #$01
150  STA NUM2; STORE LOW BYTE OF 2ND NUM
160  LDA #$00
170  STA NUM2+1; STORE HIGH BYTE OF 2ND NUM
180  ;
190  SEC
210  LDA NUM1; LOW BYTE OF NUM1
220  SBC NUM2; LOW BYTE OF NUM2
230  STA DIFF; LOW BYTE OF SUM
240  LDA NUM1+1; HIGH BYTE OF NUM1
250  SBC NUM2+1; HIGH BYTE OF NUM2
260  STA DIFF+1; HIGH BYTE OF DIFF
270  BRK
275 .END