Z80 ZEX Test Suite

This directory contains a boilerplate for running Z80 processor tests, specifically designed for the ZEXALL.COM test suite.

Features

• 64KB memory implementation
• Z80 CPU emulation using the z80 package
• BDOS call handling for CP/M functions:
  • Print character (function 2)
  • Print string (function 9)
• Proper CALL/RET simulation for BDOS calls
• Program termination detection (when PC reaches 0x0000)

Setup

1. Place the zexall.com file in this directory
2. Run with: go run .

Behavior

• If zexall.com is not found, the program will exit with an error message
• When the file is loaded successfully, the Z80 emulator will execute the test suite
• BDOS calls for character and string output are properly handled
• Program termination is detected when PC reaches 0x0000

Implementation Details

The boilerplate includes:

• Memory management for 64KB address space
• I/O handling for CP/M system calls
• CPU initialization for CP/M programs
• Execution loop with termination condition