RegionSwap

This tool allows original cartridges with region detection (mostly Konami) to run on MSX computers from another region.

For example:

* Run the Japanese language version of Salamander on a European MSX computer.
* Run the European language version of Salamander on a Japanese MSX computer.
* Play the region locked JP version of Metal Gear on a European MSX computer.

Most games that use this feature have different title screens. But sometimes there's more fun differences.

For this tool to work, the RegionSwap ROM CREATION TOOL has to first grab the main BIOS from your device and apply the region changes to it. Then it creates a unique rom file for use on the SAME device only! (This is because the BIOSes are usually different between MSX models).
When the RegionSwap is run, it'll trick the MSX into using the BIOS from slot 1 ( the modified BIOS ) rather than the original BIOS in slot 0.


Prerequisites:
* MegaFlashRom (MFR) cartridge
* A game cartridge that supports different regions
* An MSX computer with 2 slots

Steps:
* Copy all files to a folder (A:\REGSWAP, for example) on the MFR
* Run the REGSWAP.BAS file
* Wait a long time because I was too lazy to make this bit in assembly
* When done, burn the newly created rom file onto the MFR using the command:
  OPFXSD REGSWAP.ROM /L

Operation:
* The MFR has to be in slot 1 and the game cartridge in slot 2
* Once inside the RegionSwap tool, use F1 to choose the region, F2 to choose the refresh rate and F3 to start the game in slot 2.
* As usual, boot with ESC held down to skip this tool


I take no responsability for anything that might go wrong. Use at your own risk.

Have fun! 

bitsofbas 2021