Crystal Castles Source Files

In my last post I gave an overview of the files in the Historical Source Code  repository for Atari's Crystal Castles arcade game. In this post I will go into the files in detail. Here are the files in alphabetical order:

C00.DAT - C33.DAT : These contain the level data. I will go into these in more detail in a later post.

BITPAT.MAC: This files contains 8 bytes, represented as binary numbers in the file. The file is included into CEL.MAC and appears between two subroutines. It doesn't appear that this data is actually used by the game. It might be some sort of security or anti-piracy protection.

C99.MAC: Links together all the level data. This is assembled separately from the main program and becomes the second bank of ROMs.

CAL.MAC: Handles the display of the score and the high score screen.

CATOUT.MAC: Displays the Atari Easter egg message. Shown on the next level after you have jumped 128 times on the previous level.

CCN.MAC: 650X 'Universal' coin routine. This is a standard code library for handling the coin mechanism.

CCT.MAC: Draws the levels

CCUBE.MAC: Draws a cube on the screen. This is only used by the special display that happens when you score over 700,000 points.

CDB.MAC:  Routine to transfer level data from ROM to RAM 

CEE.MAC: EEROM routines 

CEEDEF.MAC: definitions for EEROM routines

CEL.MAC: Elevator handling 

CEN.MAC: Main game logic

CET.MAC: Auxiliary EEROM information, tables, output routines etc.

CG.MAC:  Global definitions and memory allocation

CGR.MAC: Global data and routines

CIN.MAC: Interrupt handlers

CLS.MAC: Sound and music data

CMAC.MAC: A couple macros to simplify common 6502 tasks

CMN.MAC: Main loop

CMR.MAC: Message display routines

CMS.MAC: Word data

CMTB.MAC: Message table

CRF.MAC: Root file

CRP.MAC: RPM (Rusty's POKEY Music) Driver

CSL.MAC: Symbol shape data

CSS.MAC: Test menu

CST.MAC: Self test

CSTART.MAC: Includes macros and zero page definitions

CWV.MAC: Level handling

HLL65F.MAC: High level language macros

M6502.MAC:  6502 general purpose macros

CJTB.MAC: This file is missing from the archive but is included in CRP.MAC. It it a patch to the POKEY music driver. I recreated this file from the original ROMs.