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Diffstat (limited to 'engine/items/subtract_paid_money.asm')
| -rw-r--r-- | engine/items/subtract_paid_money.asm | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/engine/items/subtract_paid_money.asm b/engine/items/subtract_paid_money.asm new file mode 100644 index 00000000..fdefe3d6 --- /dev/null +++ b/engine/items/subtract_paid_money.asm @@ -0,0 +1,17 @@ +; subtracts the amount the player paid from their money +; OUTPUT: carry = 0(success) or 1(fail because there is not enough money) +SubtractAmountPaidFromMoney_:: + ld de, wPlayerMoney + ld hl, hMoney ; total price of items + ld c, 3 ; length of money in bytes + call StringCmp + ret c + ld de, wPlayerMoney + 2 + ld hl, hMoney + 2 ; total price of items + ld c, 3 ; length of money in bytes + predef SubBCDPredef ; subtract total price from money + ld a, MONEY_BOX + ld [wTextBoxID], a + call DisplayTextBoxID ; redraw money text box + and a + ret |