10REM CRC Signature
  15DIM LL(5)
  20INPUT "PROM ADDRESS",Q
  25PRINT$21
  30FOR N=0 TO 1
  40DIM P(-1);S=P
  50[
  60LDA @#10;STA #8F
  70LDY @#00;STY #8E;STY #83;STY #84
  80:LL0 LDA (#80),Y;STA #82
  90LDX @8
 100:LL1 LSR #82;ROL #83;ROL #84
 110BCC LL2
 120LDA #83;EOR @#2D;STA #83
 130:LL2 DEX;BNE LL1
 140INY;BNE LL3;INC #81
 141:LL3
 150DEC #8E;BNE LL0;DEC #8F;BNE LL0
 160RTS;]
 170N.
 175PRINT $6
 180 
 190!#80=Q
 200LINK S
 210P."SIGNATURE = "&(?#83+256*?#84)
 220END