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PLAYCHOICE 10 BIOS HACK If you have any suggestions, or bug reports, send me
an e-mail at mailto:gamehacker@mchsi.com |
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This hack replaces the original bios chip on the Nintendo
Playchoice 10 Motherboard to display the correct game name on the menu. The binary image will need to be burned
into a 27C128 Eprom and placed into location 8T on the motherboard. UPDATE! v1.1 BIOS is finally finished! I have added an On-Screen name editor. So now, the BIOS chip is the only one you
need. If you cannot burn one yourself, you can order one
from this site: That’s
right, now you do not have to burn individual eproms
for the ‘name’ chip. The Playchoice
Motherboard has some Non-Volatile Ram built on to it. This is where the names can be stored. To enter the editor menu, trip one of the
coin Switches, or the service switch inside the coin door. This brings you to the slot selection
Screen.
Use the
normal buttons, (Channel Select, and Enter) to select a slot. Reset will basically reset the game. When a selection has been made, the screen
shows the slot name in an editor screen.
The 3
buttons operate a little differently here.
”Channel Select” is used as a “Shift” key. “Enter” will move the
cursor to the right. Pressing “Channel
Select” AND “Enter” will move the cursor to the left. “Reset” will scroll the character up,
“Channel Select” and “Reset” will scroll the character down. There are 2 presets on the left. (Default and Clear). So, if you move the Cursor under ‘Default’
and press “Reset” the
Name will return to the default setting (SLOT 04) for
example. Some may ask “why not use the
other buttons as well”
I wish I could. The
Playchoice is basically 2 separate processors. One is for the menu, and the other is an
8-bit Nintendo. The menu is attached
to the 3 buttons used here and the coin & service buttons. The 8-bit Nintendo section uses the rest of
the buttons. 1. The
original cartridge’s name will override the custom name eprom from v1.0 AND
the NVram name. 2. The
custom name eprom from v1.0 will override the NVram
name. 3. The NVram name will be displayed if no other name is found. One thing to remember when disabling the original ‘name’: Remove the 8 pin id chip! I just recently forgot to do this, and
thought I screwed up my program somehow. __________________________________________________________________
This has been tested on all versions of the Playchoice
hardware. Here are some screen shots:
______________________________________________________________ I have also created a visual basic program that will
create the “Name” binary Image that can be burned into a 27C64 or equivalent
eprom. This Eprom will replace the old “name” eprom usually
located at U3 or U4 on the cartridge PCB. (Update:
Here are some pre-made name images: ______________________________________________________________ This program will extract the images needed for the
Playchoice 10 from a .nes file that is commonly
used with NES Emulators. ROMUTIL.ZIP Visual Basic
6.0 Source
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