Dragon Warrior II MMC5 Patch

About this project

This is a Mapper Conversion hack for Dragon Warrior II 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)

Read the Readme for changes in this version v1.2.1

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 II (USA) Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122) File SHA-1: F464C7045A489A248686E92164FDE2903CFD013E File CRC32: E9F5BE99 ROM SHA-1: 191A131E7E27E121D094CC412FED87C708147B2C ROM CRC32: 8C5A784E

Readme & instructions

4713readme.txt

Dragon Warrior II Mapper Conversion Patch FROM Mapper 1 (MMC1) TO Mapper 5 (MMC5) Converted by Dracula X RELEASE DATE: 10/7/19 Modified: 10/28/2021 PRG Bankswitch Routine is at $FFC1 To switch banks from $C000 - $FFFF, use like so: LDA bank_number JSR $FFC1 CHR Sprite Bankswitch Routine (Left side of PPU) is at $C636 To switch sprite pages, use like so: LDA page_number JSR $C636 CHR Background Bankswitch Routine (Right side of PPU) is at $C64D To switch background pages, use like so: LDA page_number JSR $C64D Nametable Mapping Routine (one of its uses is mirroring) is at $C61F or $FE0C To change mirroring for instance, use like so: LDA…

Read moreRead less

Dragon Warrior II
Mapper Conversion Patch
FROM Mapper 1 (MMC1) TO Mapper 5 (MMC5)
Converted by Dracula X
RELEASE DATE: 10/7/19
Modified: 10/28/2021



PRG Bankswitch Routine is at $FFC1

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

LDA bank_number
JSR $FFC1




CHR Sprite Bankswitch Routine (Left side of PPU) is at $C636

To switch sprite pages, use like so:

LDA page_number
JSR $C636




CHR Background Bankswitch Routine (Right side of PPU) is at $C64D

To switch background pages, use like so:

LDA page_number
JSR $C64D




Nametable Mapping Routine (one of its uses is mirroring) is at $C61F or $FE0C

To change mirroring for instance, use like so:

LDA mirroring_number (#$50 for Horizontal, #$44 for Vertical)
JSR $C61F

This patch does not work for:
Dragon Quest II - Akuryou no Kamigami (Japan)

Hacks supported:
Dragon Warrior II General Improvement
DW2 - Remix and rebalance
Dragon Warrior 2 - Doubled

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!

10/28/2021
Changes for this version 1.2.1:
Some emulators are now supported and change it to xdelta format.

Changes for this version 1.2:
Fixed the mirroring for ending credies screen.

Changes for this version 1.1:
Fixed the bankswitch code at location $FFC1 instead of $FF97

Non Supported Emulators:
Nintendulator
RockNES
VirtuaNES