Infocom

.___        _____                           
|   | _____/ ________   ____  ____   _____  
|   |/    \   __/  _ \_/ ___\/  _ \ /     \ 
|   |   |  |  |(  <_> \  \__(  <_> |  Y Y  \
|___|___|  |__| \____/ \___  \____/|__|_|  /
         \/                \/            \/ 

In 2017, the CoCo Crew Podcast interviewed “Professor” Brian Moriarty who still had the source code to the Z-language Interpreter Program (ZIP) he wrote for Infocom.

Carlos Camacho archived the source code for the Color Computer community, and John "tuxdriver" Linville extended, patched, finessed, and reverse-engineered that source to build new Version C *and* Version D Z-language Interpreter Programs using William "lostwizard" Astle's modern 6×09 cross-assembler.

I've been using 5 key resources to understand the ZIP:

• ZIP Specification from Infocom for V3 story files
• EZIP/LZIP Specification from Infocom for V4 story files
• XZIP Specification from Infocom for V5 story files
• YZIP Specification from Infocom for V6 story files
• The Z-Machine Standards Document 1.1 for all those great implementation edge cases and details

Stuff I am figuring out:

• Table of Opcodes
• CoCo ZIP Memory Map
• Program Disk Layout
• Save Disk Layout

Building CoCo Games with Inform, 2017-11-18
Building Infocom Disk Images for CoCo, 2017-11-19
Using Infocoms ZIP on the CoCo, 2017-11-20
Z-Interpreter Source for CoCo Recovered, 2018-02-12
Infocom on the Color Computer Archive

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