Dungeon Master Encyclopaedia

Screenshots

Scans

Dungeon Master for PC-9801 5.25" floppy disks - PC-9801 VX/RX/RA (D0/VM21/VM11)

Overview

Cover

Manual

Floppy disks

Information Card

Sticker

Note

Registration Card

Dungeon Master for PC-9801 3.5" floppy disks - PC-9801 UX/EX/ES (CV/UV21/UV11)

Overview

Cover

Manual

The manual is identical to the PC-9801 3.5 inch version except for the front cover.

Floppy disks

Information Card

Sticker

Note

Registration Card

Downloads

DM-Game-PC-9801.7z

These versions consist of PC-9801 disk images in HDM format.
Dungeon Master for PC-9801 2.0a (Japanese) Original (Not working).hdm

• This is an image of the original floppy disk (except the copy protection sector) and cannot be started because of the copy protection.

Dungeon Master for PC-9801 2.0a (Japanese) Cracked.hdm

• This version is cracked (with the crack details below).

Dungeon Master for PC-9801 2.0b (Japanese) Original.hdm

• This is an image of the original floppy disk. This version is newer, contains some bug fixes and is not copy protected.

See also:
How to play PC-9801 / PC-9821 games under Windows? (Dungeon Master, Chaos Strikes Back and Dungeon Master II)
What is a PC-9801 / PC-9821?

Crack

To apply the crack, follow these steps (this applies to version 2.0a, version 2.0b is not copy protected and does not need cracking):

1. Open the file NECIO.EXE in a hexadecimal editor.
2. Go to offset 1CF1h and replace '74 03 EB 62' by 'EB 64 EB 62'. This will remove the protection check when you start a new game.
3. Open the file FIRES.EXE in a hexadecimal editor.
4. Go to offset 2636Dh and replace '26 FF 5F 58' by '90 90 90 90'. Although not mandatory for the crack to work, this will disable attempts to read the copy protection sector from the floppy disk, which would fail anyway when using a copied disk.
5. Go to offset 263A3h and replace '4F 74 01' by '4F 74 00'.
6. Go to offset 263BDh and replace '4F 74 03' by '4F 74 00'. This will cause copy protection sector checks to always succeed.