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Playchoice-10 custom instructions


Custom INST-ROM is made using a homebrew game called Magic Floor ( ).

You need the following:


Rename pck1-c.8t to PC10BIOS.ROM and place it in a sub-folder named BIOS

Edit the “MAGICPCH.A22” file with a texteditor (Notpad++ for example) and change the name or something, just to start with. Keep in mind the amount of characters have to remain the same.

Go to NO$NES emulator and do the following

  • Utility

  • Assemble

  • Open “MAGICPCH.A22”

  • The game will now start and you will see the custom instructions


Now you need to split MAGICPCH.NES file into multiple ROM files ( I don’t really have a proper way of doing this, but a HEX editor like notepad++ will do the job. You need to cut the last 8192 bytes, then cut the last 32 bytes from that file.

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