Routines
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45210: Add To Score
Used by the routines at Process_EnterForestPath, Process_CongratulationsGameOver, Process_EnterLugsCavern, Process_EnterValeOfCuchulainn, Process_EnterInnerCourtyard, Process_EnterEnchantedHills, Process_EnterDeepPoolOfWater, Process_EnterBleakMoorland, Process_EnterCrystalCavern, Process_EnterValeOfRhia, Process_EnterCauseway, Process_GetUrn, Process_GetRope, Process_GetCloak, Process_ThrowMeatToWolves, Process_GiveSaltToGuard, Process_BuyMeatFromTraderWithIron, Process_GiveRomanToDruid, Process_ThrowUrnIntoFire, Process_CaptureRoman, Process_PlaceLadderAgainstPlatform, Process_PlaceSwordOnSlab, Process_KillBear, Process_KillOxWithSword and Action_Sleep.
Adds the points in A to the two-byte BCD score at Score. The low byte is adjusted with DAA; when that addition carries, the high byte increases by one.
Input
A Points to add
Preserve HL and load the current score from Score.
AddToScore 45210 PUSH HL Stash HL on the stack.
45211 LD HL,(42948) Fetch the BCD score from *Score into HL.
Add the points into the low score byte and adjust for BCD.
45214 ADD A,L Add the points in A to the low score byte in L.
45215 DAA Decimal-adjust A for a BCD score digit.
45216 LD L,A Store the adjusted low byte back in L.
45217 JR NC,AddToScore_Store Jump to AddToScore_Store if the addition did not carry.
The low byte carried, so raise the high score byte.
45219 INC H Increase the high score byte in H by one.
Write the updated score back to Score.
AddToScore_Store 45220 LD (42948),HL Store HL at Score.
45223 POP HL Restore HL from the stack.
45224 RET Return.
View the equivalent code in;
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