(Neogeo CD) Neogeo CD Debug BIOS v006 - 模擬器

2010.06.15

This is basically the equivalent of the Unibios for the NeoGeo CD
systems. The project was started on March 2010 and aims to achieve
a comparable feature set although it has only been around for a
fraction of the time. You may be violating copyright law in your
region by downloading this BIOS without an original SNK CD system.

Features include:

- Software controlled region switching
- Setting of the debug DIP and developer mode
- Setting of the system type to “home” or “MVS”
- Setting up the soft DIP just as they are on the MVS
- Cheat engine for PAR style cheats
- Robust power on self test for diagnosing faults
- Exception handling for diagnosing software/hardware faults
- Miscellaneous debugging stuff

Planned future features include:

- Slightly faster loading times without hardware mods
- Various refinements
- Feel free to make a suggestion to the author: [email protected]

How to use:

* Power on

- Power on with button ‘A’ held to access a new hardware test much
like an MVS would do when powered on. This method of testing relies
on very few components to be functioning in order to run a complete
test and is recommended if your system starts resetting, glitching,
throwing exceptions etc. Stock BIOS chips do not offer any sort of
self-testing for the user.
- Power on with button ‘B’ held to access an I/O test. Controller
tests, video and audio tests are available.

* Initial load

- Provided the option is enabled, you will see the main menu after
the game does its initial load. Any settings can be applied before
the actual game begins and the same menu can be accessed at any
time during gameplay.

* Gameplay

- Hold START + SELECT during gameplay to access the main menu at any
time. You can resume the game by pressing start in any page.

* Saving and loading settings

- The ‘SAVE’ option in the menu saves some currently selected
settings in your systems backup RAM. These settings apply to the
current game ONLY. During the initial load, the BIOS will
automatically load any settings you have previously saved for the
current game. The options saved are listed here.

- System type
- System region
- Debug settings
- Game soft DIP
- Currently selected cheats
- Possibly a few more things in the future

- A seperate entry is made in your backup RAM for each game you save
settings with. When viewing card data, you will see “(game name
here) DBG” for each game you save data. The smallest possible
size for a save file is used to prevent too much space from being
eaten by multiple games.

Known issues

* The following bugs are already known:

- Many games will reset instantly when starting in MVS mode. This fix
must be done for every game so it will take a while to make all
games compatible
- Debug dips do not seem to have any effect on most games
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下載；http://smkdan.eludevisibility.org/ngcd/bios.zip

官方：http://smkdan.eludevisibility.org/ngcd/


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