More overworld levels and events by Ragey - Patches

File Name:	More overworld levels and events
Submitted:	2018-03-16 05:24:14 PM by Ragey
Authors:	Ragey
Tool:	Asar
Requires Free Space:	Yes
Bug Fix:	No
Featured:	No
Description:	Allows for 256 translevels and 255 overworld events. Recent versions of Lunar Magic will allow you to edit these using the overworld editor. The extension of the level and event ranges are accomplished by moving around mostly overworld-related RAM addresses, and extending the region in RAM that is transferred to and from SRAM. The level tile information table retains its original address at $1EA2, so this patch should be fairly compatible with most other resources out there.
Screenshots:

The main rejection reason: there are missing address remaps, all of them in LM hijacked locations, which break functionality.

A hijack at $03BA50 (seems to be a fixed location but if not, read3($04919A)), which breaks a check regarding re-enterable levels.

Code

code_03BA50:
    PHP
    REP #$30
    LDA $04
    PHA
    JSR label_03BA82
    LDX $04
    PLA
    STA $04
    LDA $7ED000,X
    AND #$00FF
    TAX
    LDA $1EA2,X
    AND #$0080
    BEQ label_03BA7B
    LDA $1EA2,X
    AND #$0020
    BEQ label_03BA7B
    LDA #$00FF
    BRA label_03BA7E

label_03BA7B:
    LDA $13C1

label_03BA7E:
    PLP
    CMP #$81
    RTL

label_03BA82:
    PHP
    SEP #$10
    REP #$20
    LDA $00
    PHA
    LDA $02
    PHA
    LDX $0DD6
    LDA $1F1F,X
    STA $00
    LDA $1F21,X
    STA $02
    TXA
    LSR #2
    TAX
    LDA $00
    AND #$000F
    STA $04
    LDA $00
    AND #$0010
    ASL #4
    ADC $04
    STA $04
    LDA $02
    ASL #4
    AND #$00FF
    ADC $04
    STA $04
    LDA $02
    AND #$0010
    BEQ label_03BACE
    LDA $04
    CLC
    ADC #$0200
    STA $04

label_03BACE:
    LDA $1F11,X
    AND #$00FF
    BEQ label_03BADE
    LDA $04
    CLC
    ADC #$0400
    STA $04

label_03BADE:
    PLA
    STA $02
    PLA
    STA $00
    PLP
    RTS

The routine at read3($048567), which breaks star roads and pipes.

Code

    LDY $0DD6
    LDX $1DF6
    LDA $128B52,X
    PHA
    AND #$01FF
    STA $1F17,Y
    LSR #4
    STA $1F1F,Y
    LDA $128BA2,X
    STA $1F19,Y
    LSR #4
    STA $1F21,Y
    PLA
    LSR
    XBA
    AND #$000F
    RTL

The routine at read3($049A36), which breaks red exit tiles.

Code

    LDY $0DD6
    REP #$30
    LDA #$0011
    STA $02
    LDX #$0055

label_12B3FC:
    LDA $1F19,Y
    CMP $12B467,X
    BNE label_12B44C
    LDA $1F17,Y
    CMP $12B469,X
    BNE label_12B44C
    LDA $12B46B,X
    AND #$00FF
    CMP $13C3
    BNE label_12B44C
    LDA $12B4C1,X
    STA $1F19,Y
    LDA $12B4C3,X
    STA $1F17,Y
    LDA $12B4C5,X
    AND #$00FF
    STA $13C3
    LDA $02
    ASL
    TAX
    LDA $12B51B,X
    AND #$00FF
    STA $1F21,Y
    LDA $12B51C,X
    AND #$00FF
    STA $1F1F,Y
    BRA label_12B455

label_12B44C:
    DEC $02
    DEX #5
    BPL label_12B3FC

label_12B455:
    SEP #$30
    RTL

There's one unremapped address in the routine at $0FFB20 (or read3($04DBBA)); since that's a bigass routine I'll just say it: LDY $1F11,x in $0FFB4C. This routine seems to be related to exiting a map via a red tile.

This small code snippet at $0FFAF0 (read3($049DFE)).

Code

    LDA $1F11
    CMP $1F12
    BEQ label_0FFAFD
    LDA #$0C
    STA $0100
label_0FFAFD:
    JML $05DBF2

There's probably more, but the amount of hijacks made to allow the OW to work are a ton so I might have missed one. Besides, all of these are impediments to keep testing comfortably anyway.

The patch doesn't assemble using the latest version of Asar, due to it not having read as alias of read1.

Please add a check that uninstalls the Sprite 19 fix if already installed. The error message is misleading for this one hijack; since it said I was missing one hijack, I thought I needed to install it when it was otherwhise.

Code

if read3($01E762) == $EA
    print "Sprite 19 fix detected. Uninstalling!"
    org $01E762 : JSL $03BCA0 : BRA $00
    org $03BCA0
        LDA $009EF0
        STA $1F11|!addr
        STA $1FB8|!addr
        RTL
    org $05B15D : STA $1F19|!addr
endif

Since the fix is just a bunch of NOPs too, you can always implement it inside the patch instead.

Code

org $01E762 : NOP #6 
org $05B15D : NOP #3

Also minor but you can implement this hex edit

Code

org $05DA1D : db $FF

to disable that dumb code that makes levels with a level number greater than 12E always having No Yoshi intros.

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