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55 lines
1.6 KiB
NASM
55 lines
1.6 KiB
NASM
; subtracts the amount the player paid from their money
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; OUTPUT: carry = 0(success) or 1(fail because there is not enough money)
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SubtractAmountPaidFromMoney::
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farjp SubtractAmountPaidFromMoney_
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; adds the amount the player sold to their money
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AddAmountSoldToMoney::
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ld de, wPlayerMoney + 2
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ld hl, hMoney + 2 ; total price of items
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ld c, 3 ; length of money in bytes
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predef AddBCDPredef ; add total price to money
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ld a, MONEY_BOX
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ld [wTextBoxID], a
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call DisplayTextBoxID ; redraw money text box
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ld a, SFX_PURCHASE
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call PlaySoundWaitForCurrent
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jp WaitForSoundToFinish
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; function to remove an item (in varying quantities) from the player's bag or PC box
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; INPUT:
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; HL = address of inventory (either wNumBagItems or wNumBoxItems)
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; [wWhichPokemon] = index (within the inventory) of the item to remove
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; [wItemQuantity] = quantity to remove
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RemoveItemFromInventory::
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ldh a, [hLoadedROMBank]
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push af
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ld a, BANK(RemoveItemFromInventory_)
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ldh [hLoadedROMBank], a
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ld [MBC1RomBank], a
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call RemoveItemFromInventory_
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pop af
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ldh [hLoadedROMBank], a
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ld [MBC1RomBank], a
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ret
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; function to add an item (in varying quantities) to the player's bag or PC box
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; INPUT:
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; HL = address of inventory (either wNumBagItems or wNumBoxItems)
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; [wcf91] = item ID
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; [wItemQuantity] = item quantity
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; sets carry flag if successful, unsets carry flag if unsuccessful
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AddItemToInventory::
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push bc
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ldh a, [hLoadedROMBank]
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push af
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ld a, BANK(AddItemToInventory_)
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ldh [hLoadedROMBank], a
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ld [MBC1RomBank], a
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call AddItemToInventory_
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pop bc
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ld a, b
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ldh [hLoadedROMBank], a
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ld [MBC1RomBank], a
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pop bc
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ret
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