Routines
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D36B: Subtract From Bounty
Used by the routines at ReloadRevolver and TakeFromBounty.
Subtracts an amount from Bounty, as AddToBounty adds to it.
Input
BC The amount, as four packed decimal digits
Output
F The carry flag is set if the amount is more than the bounty
Subtract the lowest two digits.
SubtractFromBounty D36B LD HL,$A259 Point HL at Bounty_LastByte.
D36E LD A,(HL) Subtract the lower two digits.
D36F SUB C
D370 DAA Make it decimal.
D371 LD (HL),A Store the lowest two digits of Bounty.
D372 DEC HL Move on to the next byte.
Subtract the middle two digits.
D373 LD A,(HL) Subtract the next two digits and the carry.
D374 SBC A,B
D375 DAA Make it decimal.
D376 LD (HL),A Store the middle two digits of Bounty.
D377 DEC HL Move on to the next byte.
Subtract the highest two digits.
D378 LD A,(HL) Subtract the carry.
D379 SBC A,$00
D37B DAA Make it decimal.
D37C LD (HL),A Store the highest two digits of Bounty.
D37D RET Return.
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