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commenting for DecrementPP from DarkShikari

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hg-commit-id: 4fc5d67d4912
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Bryan Bishop 2012-01-21 22:56:46 -06:00
parent 2d2d187399
commit e51029c125
1 changed files with 33 additions and 22 deletions
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33
common.asm
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@ -44434,29 +44434,40 @@ DecrementPP: ; 0x68000
; after using a move, decrement pp in battle and (if not transformed?) in party ; after using a move, decrement pp in battle and (if not transformed?) in party
ld a, [de] ld a, [de]
cp a, STRUGGLE cp a, STRUGGLE
ret z ret z ; if the pokemon is using "struggle", there's nothing to do
; we don't decrement PP for "struggle"
ld hl, $D062 ld hl, $D062
ld a,[hli] ld a, [hli] ; load the $D062 pokemon status flags and increment hl to load the
and a,7 ; $D063 status flags later
ret nz and a, 7 ; check to see if bits 0, 1, or 2 are set
bit 6,[hl] ret nz ; if any of these statuses are true, don't decrement PP
ret nz bit 6, [hl] ; check 6th bit status flag on $D063
ret nz ; and return if it is set
ld hl, $D02D ; PP of first move (in battle) ld hl, $D02D ; PP of first move (in battle)
call .DecrementPP\@ call .DecrementPP\@
ld a,[$D064] ld a, [$D064] ; load pokemon status bits?
bit 3, a ; XXX transform status? bit 3, a ; XXX transform status?
ret nz ret nz ; If it is, return. Pokemon Red stores the "current pokemon's" PP
; separately from the "Pokemon in your party's" PP. This is
; duplication -- in all cases *other* than Pokemon with Transform.
; Normally, this means we have to go on and make the same
; modification to the "party's pokemon" PP that we made to the
; "current pokemon's" PP. But, if we're dealing with a Transformed
; Pokemon, it has separate PP for the move set that it copied from
; its opponent, which is *not* the same as its real PP as part of your
; party. So we return, and don't do that part.
ld hl, $D188 ; PP of first move (in party) ld hl, $D188 ; PP of first move (in party)
ld a, [$CC2F] ; which mon in party is active ld a, [$CC2F] ; which mon in party is active
ld bc,$2C ld bc, $2C ; XXX probably size of party pokemon's data structure
call AddNTimes call AddNTimes ; calculate address of the mon to modify
.DecrementPP\@ .DecrementPP\@
ld a, [$CC2E] ; which move (0, 1, 2, 3) did we use? ld a, [$CC2E] ; which move (0, 1, 2, 3) did we use?
ld c, a ld c, a
ld b, 0 ld b, 0
add hl,bc add hl ,bc ; calculate the address in memory of the PP we need to decrement
; based on the move chosen.
dec [hl] ; Decrement PP dec [hl] ; Decrement PP
ret ret
; 0x6802f ; 0x6802f