While digging through the various recently uploaded source code files, there is a file in the first version (R2) of Mini-Zork (1982) called “zap.mid” (“x.mid” seems to be a duplicate). This file appears to be the source code for ZAP written in MIDAS assembly language which is an MIT-developed port of the more popular MACROS assembly language more commonly used on PDP machines.
Intro of the file:
TITLE ZAP – New Z-Language Assembler
; ZAP version 3 - Expanded word table to 96 words
; MARC/JMB - 1/7/82
ZAP is the program that takes the Z assembly language code from ZILCH (the compiler for ZIL). After two passes, a complete story file (so called ZIP file) is created.
I was unable to actually compile this file as it is difficult to find a working MIDAS assembler. Maybe someone can translate this assembly code into a more popular x86 or 68000 assembly.