![Asterix And The Great Rescue Asterix And The Great Rescue](https://www.smspower.org/maxim/uploads/Maps/AsterixAndTheGreatRescue-Title.png)
Introduction
Work in progress...
The hack
.memorymap
slotsize $4000
slot 0 $0000
slot 1 $4000
slot 2 $8000
defaultslot 2
.endme
.rombankmap
bankstotal 32
banksize $4000
banks 32
.endro
.background "Asterix and the Great Rescue.sms"
.define scrollx $c226
.define scrolly $c22c
.bank 0 slot 0
.org $0038
.section "Hack here :)" overwrite
jp hack
afterhack:
.ends
.unbackground $7f00 $7fef
.bank 1 slot 1
.section "hack" free
hack:
; what I replaced to get here
push af
push bc
push de
in a,($dd) ; get P2 inputs
ld de,(scrollx)
bit 0,a
jr nz,+
dec de
+:bit 1,a
jr nz,+
inc de
+:ld (scrollx),de
in a,($dc) ; get P1+2 inputs
ld de,(scrolly)
bit 7,a
jr nz,+
inc de
+:bit 6,a
jr nz,+
dec de
+:ld (scrolly),de
; done
jp afterhack
.ends
.macro patch args addr, len
.define page\@ addr>>14
.bank page\@ slot page\@
.orga addr
.section "patch\@" overwrite
.rept len
nop
.endr
.ends
.endm
; patch out regular movement
patch $32db 3
patch $3235 3
patch $4164 3
patch $35aa 3
patch $354a 3
patch $33ba 3
patch $345b 3
slotsize $4000
slot 0 $0000
slot 1 $4000
slot 2 $8000
defaultslot 2
.endme
.rombankmap
bankstotal 32
banksize $4000
banks 32
.endro
.background "Asterix and the Great Rescue.sms"
.define scrollx $c226
.define scrolly $c22c
.bank 0 slot 0
.org $0038
.section "Hack here :)" overwrite
jp hack
afterhack:
.ends
.unbackground $7f00 $7fef
.bank 1 slot 1
.section "hack" free
hack:
; what I replaced to get here
push af
push bc
push de
in a,($dd) ; get P2 inputs
ld de,(scrollx)
bit 0,a
jr nz,+
dec de
+:bit 1,a
jr nz,+
inc de
+:ld (scrollx),de
in a,($dc) ; get P1+2 inputs
ld de,(scrolly)
bit 7,a
jr nz,+
inc de
+:bit 6,a
jr nz,+
dec de
+:ld (scrolly),de
; done
jp afterhack
.ends
.macro patch args addr, len
.define page\@ addr>>14
.bank page\@ slot page\@
.orga addr
.section "patch\@" overwrite
.rept len
nop
.endr
.ends
.endm
; patch out regular movement
patch $32db 3
patch $3235 3
patch $4164 3
patch $35aa 3
patch $354a 3
patch $33ba 3
patch $345b 3