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|
GiveMoney:: ; 15fd7
ld a, 3
call AddMoney
ld bc, MaxMoney
ld a, 3
call CompareMoney
jr z, .not_maxed_out
jr c, .not_maxed_out
ld hl, MaxMoney
ld a, [hli]
ld [de], a
inc de
ld a, [hli]
ld [de], a
inc de
ld a, [hli]
ld [de], a
scf
ret
.not_maxed_out
and a
ret
; 15ff7
MaxMoney: ; 15ff7
dt 999999
; 15ffa
TakeMoney:: ; 15ffa
ld a, 3
call SubtractMoney
jr nc, .okay
; leave with 0 money
xor a
ld [de], a
inc de
ld [de], a
inc de
ld [de], a
scf
ret
.okay
and a
ret
; 1600b
CompareMoney:: ; 1600b
ld a, 3
CompareFunds: ; 1600d
; a: number of bytes
; bc: start addr of amount (big-endian)
; de: start addr of account (big-endian)
push hl
push de
push bc
ld h, b
ld l, c
ld c, 0
ld b, a
.loop1
dec a
jr z, .done
inc de
inc hl
jr .loop1
.done
and a
.loop2
ld a, [de]
sbc [hl]
jr z, .okay
inc c
.okay
dec de
dec hl
dec b
jr nz, .loop2
jr c, .set_carry
ld a, c
and a
jr .skip_carry
.set_carry
ld a, 1
and a
scf
.skip_carry
pop bc
pop de
pop hl
ret
; 16035
SubtractMoney: ; 16035
ld a, 3
SubtractFunds: ; 16037
; a: number of bytes
; bc: start addr of amount (big-endian)
; de: start addr of account (big-endian)
push hl
push de
push bc
ld h, b
ld l, c
ld b, a
ld c, 0
.loop
dec a
jr z, .done
inc de
inc hl
jr .loop
.done
and a
.loop2
ld a, [de]
sbc [hl]
ld [de], a
dec de
dec hl
dec b
jr nz, .loop2
pop bc
pop de
pop hl
ret
; 16053
AddMoney: ; 16053
ld a, 3
AddFunds: ; 16055
; a: number of bytes
; bc: start addr of amount (big-endian)
; de: start addr of account (big-endian)
push hl
push de
push bc
ld h, b
ld l, c
ld b, a
.loop1
dec a
jr z, .done
inc de
inc hl
jr .loop1
.done
and a
.loop2
ld a, [de]
adc [hl]
ld [de], a
dec de
dec hl
dec b
jr nz, .loop2
pop bc
pop de
pop hl
ret
; 1606f
GiveCoins:: ; 1606f
ld a, 2
ld de, Coins
call AddFunds
ld a, 2
ld bc, .maxcoins
call CompareFunds
jr c, .not_maxed
ld hl, .maxcoins
ld a, [hli]
ld [de], a
inc de
ld a, [hli]
ld [de], a
scf
ret
.not_maxed
and a
ret
; 1608d
.maxcoins ; 1608d
bigdw 9999
; 1608f
TakeCoins:: ; 1608f
ld a, 2
ld de, Coins
call SubtractFunds
jr nc, .okay
; leave with 0 coins
xor a
ld [de], a
inc de
ld [de], a
scf
ret
.okay
and a
ret
; 160a1
CheckCoins:: ; 160a1
ld a, 2
ld de, Coins
jp CompareFunds
; 160a9
|
