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98 lines
2.1 KiB
NASM
98 lines
2.1 KiB
NASM
_GiveOddEgg:
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; Figure out which egg to give.
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; Compare a random word to
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; probabilities out of 0xffff.
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call Random
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ld hl, OddEggProbabilities
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ld c, 0
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ld b, c
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.loop
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ld a, [hli]
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ld e, a
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ld a, [hli]
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ld d, a
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; Break on $ffff.
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ld a, d
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cp HIGH($ffff)
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jr nz, .not_done
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ld a, e
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cp LOW($ffff)
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jr z, .done
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.not_done
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; Break when the random word <= the next probability in de.
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ldh a, [hRandomSub]
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cp d
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jr c, .done
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jr z, .ok
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jr .next
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.ok
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ldh a, [hRandomAdd]
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cp e
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jr c, .done
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jr z, .done
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.next
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inc bc
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jr .loop
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.done
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ld hl, OddEggs
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ld a, NICKNAMED_MON_STRUCT_LENGTH
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call AddNTimes
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; Writes to wOddEgg, wOddEggName, and wOddEggOTName,
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; even though OddEggs does not have data for wOddEggOTName
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ld de, wOddEgg
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ld bc, NICKNAMED_MON_STRUCT_LENGTH + NAME_LENGTH
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call CopyBytes
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ld a, EGG_TICKET
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ld [wCurItem], a
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ld a, 1
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ld [wItemQuantityChangeBuffer], a
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ld a, -1
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ld [wCurItemQuantity], a
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ld hl, wNumItems
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call TossItem
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; load species in wcd2a
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ld a, EGG
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ld [wMobileMonSpeciesBuffer], a
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; load pointer to (wMobileMonSpeciesBuffer - 1) in wMobileMonSpeciesPointerBuffer
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ld a, LOW(wMobileMonSpeciesBuffer - 1)
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ld [wMobileMonSpeciesPointerBuffer], a
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ld a, HIGH(wMobileMonSpeciesBuffer - 1)
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ld [wMobileMonSpeciesPointerBuffer + 1], a
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; load pointer to wOddEgg in wMobileMonStructurePointerBuffer
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ld a, LOW(wOddEgg)
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ld [wMobileMonStructurePointerBuffer], a
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ld a, HIGH(wOddEgg)
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ld [wMobileMonStructurePointerBuffer + 1], a
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; load Odd Egg Name in wTempOddEggNickname
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ld hl, .Odd
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ld de, wTempOddEggNickname
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ld bc, MON_NAME_LENGTH
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call CopyBytes
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; load pointer to wTempOddEggNickname in wMobileMonOTNamePointerBuffer
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ld a, LOW(wTempOddEggNickname)
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ld [wMobileMonOTNamePointerBuffer], a
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ld a, HIGH(wTempOddEggNickname)
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ld [wMobileMonOTNamePointerBuffer + 1], a
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; load pointer to wOddEggName in wMobileMonNicknamePointerBuffer
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ld a, LOW(wOddEggName)
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ld [wMobileMonNicknamePointerBuffer], a
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ld a, HIGH(wOddEggName)
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ld [wMobileMonNicknamePointerBuffer + 1], a
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farcall AddMobileMonToParty
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ret
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.Odd:
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db "ODD@@@@@@@@@"
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INCLUDE "data/events/odd_eggs.asm"
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