Routines
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CB22: Add Points To Score
Used by the routines at GameEntryPoint and B724.
Input
HL Pointer to address of points to add to score
An example of HL is Time_Remaining which would add the time remaining to the score when the level is complete.
AddPointsToScore CB22 LD IX,$CB96 IX=ActivePlayer_Score.
Handle the "tens" units.
CB26 LD A,(IX+$00) A=*IX+00.
CB29 ADD A,(HL) Add *HL to score byte #1 with BCD conversion.
CB2A DAA
CB2B LD (IX+$00),A Write A to *IX+00.
Move onto the next score digit.
CB2E INC HL Increment HL by one.
Handle the "thousands" units.
CB2F LD A,(IX+$01) A=*IX+01.
CB32 ADC A,(HL) Add (with carry) *HL to score byte #2 with BCD conversion.
CB33 DAA
Handle the "hundreds of thousands" units.
CB34 LD (IX+$01),A Write A to *IX+01.
The final digit always has a base of 00.
CB37 LD A,$00 Add (with carry) 00 to *IX+02 to score byte #3.
CB39 ADC A,(IX+$02)
CB3C LD (IX+$02),A Write A to *IX+02.
CB3F RET Return.
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