Dragon Warrior MMC5 Patch

About this project

This is a Mapper Conversion hack for Dragon Warrior ROM from MMC1 to MMC5.

Features:

Expansion RAM ($5C00-$5FFF, read/write)
CPU $6000-$7FFF: 8 KB switchable PRG RAM bank
Bankswitching included. Readme file for more info.
Extended RAM mode ($5104)

This also works for "Dragon Warrior (USA) (Rev A)" ROM.

Read the Readme for changes in this version v1.1.2

Note: The author have tested most of the emulators but doesn’t work well with Nintendulator, RockNES and VirtuaNES.

Now works with BizHawk and Mesen.

Database match: Dragon Warrior (USA) Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122) File SHA-1: 6A50CE57097332393E0E8751924FD56456EF083C File CRC32: CAAF5C6B ROM SHA-1: 73F9B88DEF80756EF29C5AA1A724C3112E5918C1 ROM CRC32: 3B3F88F0

Readme & instructions

4698readme.txt

Dragon Warrior Mapper Conversion Patch FROM Mapper 1 (MMC1) TO Mapper 5 (MMC5) Converted by Dracula X RELEASE DATE: 10/2/19 Last Modified 07/12/2020 PRG Bankswitch Routine is at $FF96 To switch banks from $C000 - $FFFF, use like so: LDA bank_number JSR $FF96 JSR to any location in $8000-$BFFF or LDA bank_number #$80 PHA LDA bank_number #$00 PHA LDA bank_number #$04 JSR $FF96 RTS CHR Sprite Bankswitch Routine (Left side of PPU) is at $FFAC To switch sprite pages, use like so: LDA page_number JSR $FFAC CHR Background Bankswitch Routine (Right side of PPU) is at $FFC2 To switch background pages, use like so: LDA page_number JSR $FFC2 Nametable…

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Dragon Warrior
Mapper Conversion Patch
FROM Mapper 1 (MMC1) TO Mapper 5 (MMC5)
Converted by Dracula X
RELEASE DATE: 10/2/19
Last Modified 07/12/2020




PRG Bankswitch Routine is at $FF96

To switch banks from $C000 - $FFFF, use like so:

LDA bank_number
JSR $FF96
JSR to any location in $8000-$BFFF

or

LDA bank_number #$80
PHA
LDA bank_number #$00
PHA
LDA bank_number #$04
JSR $FF96
RTS




CHR Sprite Bankswitch Routine (Left side of PPU) is at $FFAC

To switch sprite pages, use like so:

LDA page_number
JSR $FFAC




CHR Background Bankswitch Routine (Right side of PPU) is at $FFC2

To switch background pages, use like so:

LDA page_number
JSR $FFC2




Nametable Mapping Routine (one of its uses is mirroring) is at $FE09

To change mirroring for instance, use like so:

LDA mirroring_number (#$50 for Horizontal, #$44 for Vertical)
JSR $FE09

This patch does not work for:
Dragon Quest (Japan)

Hacks supported:
All!

Credits:
Rockman or RetroRain: for info on how to convert the mapper!
Disch: for his mapper docs and a better MMC5 startup!
Bregalad: for info about the game keeps on crashing!

Changes for this version 1.1a:
Changed the IPS format to xdelta format and all hacks are now supported.

Changes for this version 1.1:
Fixed the bankswitch code at location $FF96 instead of $FF7D
Changed the $5105 Nametable mapping code.

Changes for this version 1.1.2:
Added a new version number.
All emulators are now supported.

All emulators are now supported, but some emulators will show garbage.