Zippy Race Sega SG-1000 to MSX conversion patch
Zippy Race (aka Traverse USA) (C) 1983 Irem
Sega SG-1000 port (C) 1983 Sega
MSX conversion 23-01-07 by hap, http://hap.samor.nl/


== USAGE ==

* Use your favourite IPS tool to patch the ROM dump with "ZIP2MSX.IPS"
  (it's called "Zippy Race (SG-1000) [!].sg" in GoodSMS, CRC32:BC5D20DF),
* optionally rename the game file extension to the standard used by MSX (.ROM),
* run the game on your MSX or MSX emulator with at least 64KB RAM, have fun!

Controls:

Keyboard: LEFT/RIGHT to steer, SPACE to drive, GRAPH to brake.
Joystick: LEFT/RIGHT to steer, TRG A to drive. TRG B to brake. (port 1)

On MSX2 or higher, hold down SELECT during boot to prevent 60hz mode,
and/or hold down BACKSPACE to prevent the palette from being changed.


== NOTES ==

The goal of this project was to get me a bit into Z80 ASM, this basically was
my first Z80 programming experience, I'm satisfied it succeeded. I've included
most of the source code (*.asm files) for the ones who are interested. The
rest of it was too messy to deserve inclusion :p

The result has been tested thoroughly on my (t)rusty old MSX2, it should work
fine for everybody.