pokecrystal-board/engine/odd_eggs.asm

97 lines
1.9 KiB
NASM

GiveOddEgg: ; 1fb4b6
; Figure out which egg to give.
; Compare a random word to
; probabilities out of 0xffff.
call Random
ld hl, OddEggProbabilities
ld c, 0
ld b, c
.loop
ld a, [hli]
ld e, a
ld a, [hli]
ld d, a
; Break on $ffff.
ld a, d
cp HIGH($ffff)
jr nz, .not_done
ld a, e
cp LOW($ffff)
jr z, .done
.not_done
; Break when [hRandom] <= de.
ld a, [hRandom + 1]
cp d
jr c, .done
jr z, .ok
jr .next
.ok
ld a, [hRandom + 0]
cp e
jr c, .done
jr z, .done
.next
inc bc
jr .loop
.done
ld hl, OddEggs
ld a, OddEgg2 - OddEgg1
call AddNTimes
ld de, OddEggSpecies
ld bc, PARTYMON_STRUCT_LENGTH + 2 * PKMN_NAME_LENGTH
call CopyBytes
ld a, EGG_TICKET
ld [CurItem], a
ld a, 1
ld [wItemQuantityChangeBuffer], a
ld a, -1
ld [CurItemQuantity], a
ld hl, NumItems
call TossItem
; load species in wcd2a
ld a, EGG
ld [wMobileMonSpeciesBuffer], a
; load pointer to (wMobileMonSpeciesBuffer - 1) in wMobileMonSpeciesPointerBuffer
ld a, LOW(wMobileMonSpeciesBuffer - 1)
ld [wMobileMonSpeciesPointerBuffer], a
ld a, HIGH(wMobileMonSpeciesBuffer - 1)
ld [wMobileMonSpeciesPointerBuffer + 1], a
; load pointer to OddEggSpecies in wMobileMonStructurePointerBuffer
ld a, LOW(OddEggSpecies)
ld [wMobileMonStructurePointerBuffer], a
ld a, HIGH(OddEggSpecies)
ld [wMobileMonStructurePointerBuffer + 1], a
; load Odd Egg Name in wTempOddEggNickname
ld hl, .Odd
ld de, wTempOddEggNickname
ld bc, PKMN_NAME_LENGTH
call CopyBytes
; load pointer to wTempOddEggNickname in wMobileMonOTNamePointerBuffer
ld a, LOW(wTempOddEggNickname)
ld [wMobileMonOTNamePointerBuffer], a
ld a, HIGH(wTempOddEggNickname)
ld [wMobileMonOTNamePointerBuffer + 1], a
; load pointer to wOddEggName in wMobileMonNicknamePointerBuffer
ld a, LOW(wOddEggName)
ld [wMobileMonNicknamePointerBuffer], a
ld a, HIGH(wOddEggName)
ld [wMobileMonNicknamePointerBuffer + 1], a
farcall AddMobileMonToParty
ret
; 1fb546
.Odd:
db "ODD@@@@@@@@@"
INCLUDE "data/odd_eggs.asm"