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Disassembled Source Code for the C64 game Matrix by Jeff Minter

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Matrix: Gridrunner 2 (1983) by Jeff Minter

This is the disassembled and commented source code for the 1983 Commodore 64 game Matrix by Jeff Minter. It is part of the llamasource project.

A version of the game you can play in your browser can be found at https://matrix.xyz.

Minter wrote in his design notes for the game:

Matrix: The last of the Grid games, transferred over to the '64 in
an intense 3-day hack session just before my holiday in Portugal.
The graphics look a bit thin and weedy if you've been used to the
nice fat Vic display, but the action is very fast. Despite its
Centipede roots, I still look on the Grid series as quite a nice
bit of blasting. The XY cannon makes them just sufficiently different
to be a decent blast. I never did get through all 20 levels without
resorting to cheating (the cheat mode is accessed by holding down
Commodore, Shift, CTRL and a letter key, and is left over from when
I was testing the levels), best I managed legitimately was to reach
Level 17.

Cheats

The game contains a cheatcode for skipping levels. It's slightly complicated and was added by Minter himself to assist testing. If you hold down Ctrl, Shift, and Tab and press any other key the game will clear the level, give you a bonus and an extra life. You can use this sequence to skip ahead as many levels as you like!

Requirements

To compile and run it do:

$ make

The compiled game is written to the bin folder.

To just compile the game and get a binary (matrix.prg) do:

$ make matrix