Routines
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B09A: 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.
Input
A Points to add
AddToScore B09A PUSH HL Stash HL on the stack.
B09B LD HL,($A7C4) Load *Score into HL.
B09E ADD A,L Add the points to the low byte.
B09F DAA Decimal adjust for BCD (Binary Coded Decimal).
B0A0 LD L,A Store the adjusted result.
B0A1 JR NC,SaveScore Jump to SaveScore if there was no carry from the addition.
If there was carry, increment the high byte.
B0A3 INC H Increment the high byte by one.
SaveScore B0A4 LD ($A7C4),HL Write the updated score back to *Score.
B0A7 POP HL Restore HL from the stack.
B0A8 RET Return.
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