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Better documenting for GetMachinePrice and TechnicalMachinePrices.

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This commit is contained in:
Marcus Huderle 2015-01-24 12:41:20 -08:00
parent 5b7c8541db
commit 3cf945bad4
3 changed files with 37 additions and 12 deletions
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11
engine/items/tm_prices.asm
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@ -1,5 +1,8 @@
GetMachinePrice: ; 7bf86 (1e:7f86)
ld a, [wcf91]
; Input: [wcf91] = Item Id of a TM
; Output: Stores the 2-byte TM price in [H_DOWNARROWBLINKCNT1] and [H_DOWNARROWBLINKCNT2]
; as a BCD
ld a, [wcf91] ; a contains TM item id
sub TM_01
ret c
ld d, a
@ -8,11 +11,11 @@ GetMachinePrice: ; 7bf86 (1e:7f86)
ld c, a
ld b, 0
add hl, bc
ld a, [hl]
ld a, [hl] ; a contains byte whose high or low nybble is the TM price (in thousands)
srl d
jr nc, .asm_7bf9d
jr nc, .highNybbleIsPrice ; is TM id odd?
swap a
.asm_7bf9d
.highNybbleIsPrice
and $f0
ld [H_DOWNARROWBLINKCNT2], a ; $ff8c
xor a