PyGmc4

Introduction

PyGmc4 is a GMC-4 emulator runs on Pyxel/Python library. Dev Notes here.

How to Play

• (a) Install the Python3.8 (python-3.8.9.exe), which can be obtained from https://www.python.org/downloads/
• (b) Install the Pyxel1.7.0 on Python from the command line:
  • C> pip install pyxel
• (c) From the command line, run:
  • C> python PyGmc4.py <FXP file name>
  • Example: C> python PyxelChip8.py led/led.fxp
• (d) Click [x] when finished

How to control

The keys are mapped as follows.

Original |C|D|E|F| Mapping to |1|2|3|4|
         |8|9|A|B|            |Q|W|E|R|
         |4|5|6|7|            |A|S|D|F|
         |0|1|2|3|            |Z|X|C|V|

Specification

Memory

• RAM (00H - 5FH)

Registers

• Data Registers (A,B,A',B')
• Address Registers (Y,Z,Y',Z')
• Control Registers (PC, Flag)

Graphics

• Binary LED (No.0 .. No.6)
• 7-segment LED

Instruction set

• I/O instructions: Key input, Binary LED control, 7-segment LED control, Sound
• Transfer instructions: Assignment, Exchange
• Arithmetic instructions: Real calculation, Compare
• Conditional Branch: Jump, Timer wait

Keyboard

• Hexadecimal keyboard