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Emulators: Neko Project2X


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Neko Project2X

Neko ProjectX is a PC-98 emulator for Xbox

User Guide:

Copy the emulator in your hard disk. Roms MUST be placed uncompressed in the "roms" directory. The emulator supports a good amount of formats, both hard disk images and floppy disk images. Here are some of the supported formats, ordered from the best to the worst choice:

1- HDI: This is a hard disk image, it is the easiest format to launch: simply click and play.

2- FDI: This is a floppy disk image. It is easy too, although some games may have several floppy disks images, and you will need to change the disk when the game asks for it.

3- D88: This is a supported format that will work, but you will usually need to do some things to launch it (write some command...) so it is less comfortable.

4- FDD: This format does not work in this emulator... but you can use "Virtual Floppy Image Converter" to convert it to D88 (or to FDI if you are lucky).

This emulator currently supports PC-9801 games and some PC-9821 games.

If you want to play a game that has only one file (for example one HDI file, or one FDI file) simply click on it in the rom list, and the game will be launched. Easy, isn't it? 😉

If you want to play a game that has SEVERAL floppy disk images, you must select the FIRST of them. The emulator will automatically mount it in the "Floppy Unit A" of the PC-98 and will run it. If you need to insert another disk during the gameplay, please read the "CHANGING FLOPPY DISKS" section.


Although the PC-98 is a computer and it uses a keyboard, I have mapped the most common keys in all the games to the buttons of our joypads, so we will be able to play several games with the d-pad and the normal buttons. Mouse has been mapped too 🙂

Here is the default mapping (anyways, you will be able to redefine the A,B,X,Y buttons in the main menu, if you need different mappings):

D-pad: It is mapped to the directional keys of the keypad (UP, DOWN, LEFT, RIGHT)

A button: ENTER key
B button: ESC key
X button: SPACE key
Y button: It is mapped by default to 2 keys that are used by several games as the "action key": the 5 of the keypad (used in games like "Columns") and the Z key (used in games like "Rusty"). 

LEFT ANALOG STICK: It moves the mouse cursor (only usefull in games that use mouse).
WHITE button: Left-click with the mouse
BLACK button: Right-click with the mouse

TRIGGERS: They control the key latency (you can think about it as the "speed of an autofire feature" or the "speed of the mouse cursor"). Let's see it:

LEFT TRIGGER: Decrease key latency. If you keep pressed a button, it will send less "push" commands per second. Use this if your cursor/controls move very fast, and you are unable to navigate by the menus of a game because options are selected too fast. Very usefull in games with menus like "Columns".

RIGHT TRIGGER: Increase key latency. If you keep pressed a button, it will send more "push" commands per second. Use this if your cursor/controls move very slow. This is very usefull to move the cursor faster in some strategy games like the "Farland Story" ones.

START: Opens the Main Menu (see "Main Menu" section for more info)

Some usefull shortcuts:
LEFT ANALOG STICK CLICK: Insert a new disk in the Floppy Unit A.
RIGHT ANALOG STICK CLICK: Insert a new disk in the Floppy Unit B.
START + BACK: Exit to the rom list.


Q: How can I know if a game has adult content or not? 
A: Some sites have a catalog of PC-98 games with a flag saying if a game has adult content or not. For example http://fullmotionvideo.free.fr/screen/! title.html or http://www.pc98.org/

Q: How can I know if a game needs Japanese knowledge? 
A: Unfortunately, I have not found a site that has this kind of flag for the games, but you can see the screenshots or the genre of the game, to guess it. Please, if you find a site with details about the Japanese knowledge needed for each game, let me know!

Q: Please, tell me a few games playable without Japanese knowledge, and without adult content!
A: OK, here are a few: the English translations of the games Farland Story 1, Farland Story 2, Farland Story 3, Farland Story 4, Farland Story 5, Farland Story 6... Do you need more? Well, you can play Columns, Carax'92, Jump Hero, Popful Mail, Prince of Persia (it is in Japanese, but it is playable simply clicking on the first option of the menu), Runners High, Rusty, Car 2 Grand Prix, Dungeon Master, Elvira-Mistress of the Dark, Galaga, Gods, Lemmings, Mety's Snow War, Mole Mole, Net Guardian, Push'n Pop, and many more...

Q: My game displays a weird Japanese error when launched!
A: I can suggest two things: first of all, if the error message contains something "similar" to "SW 2 8", go to the main menu and select "Reset with DIP SW 2-8". Second, if you are trying to launch a game that has several floppy disk images, maybe you need to insert the image number 2 in the Floppy Unit B (you can do it pressing the right analog stick) and after that, go to the main menu and select "Reset". If that fails, I'm sorry but I cannot help more, as I don't know Japanese.

Q: How can I launch games with multiple floppy disk images?
A: You must select the FIRST of them, and the game will begin (the emulator will insert it in the Floppy Unit A). If an error is displayed, you will usually need to insert the SECOND disk on the Floppy Unit B clicking the right analog stick) and maybe after that you will need to go to the main menu and "Reset". During the gameplay, sometimes you will be prompted to insert a new disk, and you can do it pressing the left or right analog sticks.

Q: My game runs too slow!
A: Go to the main menu pressing Start, then try to increase the clock speed (for example at 40 MHz if you are in PC-9801 emulation), and choose "Reset". This trick works well for PC-9801 emulation, but unfortunately it is usually not enough when we emulate a PC-9821.

Q: My game runs too fast!
A: Go to the main menu pressing Start, configure the clock speed at 2 MHz, and choose "Reset"

Q: How can I play PC-9821 games?
A: Select them with "X" in the rom list.




I want to say thanks to all the people that helped me in my projects: Neobomb, Hyper_Eye, Madmab, Freakdave, weinerschnitzel, XtecuterX73, SPPV, darknoir, the Surreal64 CE team... Besides, big thanks to all the people that make possible the Xbox scene and the emuxtras project, Neobomb (again!), Wimpy, Waal, Bigby, Madmab, Perr, Mega Man, SPPV... Thank you very much for your work!

Lots of thanks to the kind people of the Tokugawa Corporate Forums who helped me in my first steps with PC-98, mainly Ben, peter_j, Trickless, Ryo Cokey, Don Rumata, DrJones, Starscream the 2nd and Kobushi. And of course, thanks to the creator of the original Neko Project II and all the developers who released variants of it.

Huge thanks to gradius3 for all his support, ideas and beta testing help!

The sources of the emulator are in the same package, so if anyone wants to see them and try to improve them, it will be very wellcome. You can contact me if you want to do it.

Thank you for reading this! 🙂




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