TRS-80 Parse Level 1 BASIC Cassette File

A Python script to extract Level 1 BASIC programs from a .cas file.

I wrote this script to extract the BASIC programs from some Level 1 CLOAD magazine .cas files in order to convert them to Level 2 BASIC.

I hope it might be useful to other TRS-80 Level 1 users as well.

Please note that a single .cas file can contain multiple BASIC programs.

Requirements

Python 3.6 or higher

Usage

usage: trs_parse_l1_cas.py [-h] [-v] filename

positional arguments:
  filename       input filename (.cas)

optional arguments:
  -h, --help     show this help message and exit

Example Output

================================================================================
TRS-80 Parse Level 1 BASIC Cassette File
by Kyle Wadsten
Version 1.0, 08/19/2019
www.github.com/kwadsten

Input file: /Users/kpw/Desktop/hello.cas
File size:    172 (0x00AC)

--------------------------------------------------------------------------------
Program #1
--------------------------------------------------------------------------------
     Pre-null Count:      0   (0x00)
         Null Count:    128   (0x80)
          File Type:    165   (0xA5)
 Program Start Addr: 16,896 (0x4200)
   Program End Addr: 16,934 (0x4226)
     Program Length:     39 (0x0027)
           Checksum:    165   (0x56)
--------------------------------------------------------------------------------
10  CLS
20  PRINT "HELLO WORLD!"
30  END
================================================================================