https://github.com/adzierzanowski/z80

Zilog Z80 (and Intel 8080) assembler/disassembler for everyone and some other tools for my private Z80 stuff
https://github.com/adzierzanowski/z80

8080 arduino assembler disassembler z80 zilog

Last synced: 9 days ago
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Zilog Z80 (and Intel 8080) assembler/disassembler for everyone and some other tools for my private Z80 stuff

• Host: GitHub
• URL: https://github.com/adzierzanowski/z80
• Owner: adzierzanowski
• Created: 2021-09-22T15:07:17.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2022-12-31T13:05:29.000Z (almost 2 years ago)
• Last Synced: 2023-03-05T01:53:31.257Z (over 1 year ago)
• Topics: 8080, arduino, assembler, disassembler, z80, zilog
• Language: C
• Homepage:
• Size: 17.9 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# Zilog Z80 playground

This is a scratchpad repository containing my Z80 sandbox.

## Assembler

The most interesting for other people is most probably **[an assembler](z80asm)**

written in Python.

The assembler is more-than-two-pass assembler to make code more readable than

optimized.

I've also written a 2-pass Z80 assember in C which is much faster.

[Check it out here](https://github.com/adzierzanowski/zasm).

## Z80 Minicomputer

For now the other part of the project consists of:

* a main board with 10 MHz Zilog Z80 CPU and some LEDs,

* a RAM board with two 62256 SRAM chips, 32 kiB of memory each

  and 7-segment displays showing data and address bus state,

* a CLKMOD board acting as a clock and interrupt controller.

Implying the following specs:

```

- Up to 1 MHZ Z80 CPU (because of bottleneck that is CLKMOD which will

                       be replaced with a crystal oscillator)

- 64 kiB SRAM

- No external non-volatile memory

- No IO at the moment

```

At the moment I'm developing the new IO Controller and IO device modules:

* 128x160 TFT display module,

* PS/2 keyboard input module.

In the `legacy/` directory there are some IO controller files which I used

for communicating with the CPU via serial port and low-resolution VGA output.

# Files

* `z80asm` – Python dual-syntax (i8080, Z80) assembler/disassembler module

* `busctl/` – Bus controller (and RAM Uploader)

* `clkmod/` – Clock emulator

* `fontmaker/` – Little HTML/JS utility for creating fonts

* `legacy/` – Old unused controllers

* `lib/` – ASM libraries

* `schematics/` – KiCAD schematics

* `static/` and `templates/` – Flask assets

* `tft` – TFT Display Controller

* `ctl.py` – Flask GUI for the clock emulator

* `prog.py` – Bus controller RAM programming interface

* `serialprompt.py` – Utility for fast testing of serial communication

# Resources

* https://maker.pro/pic/projects/z80-computer-project-part-1-the-cpu

* https://istvannovak.net/2018/01/25/zx-spectrum-ide-part-3-a-brief-overview-of-the-z80a-cpu/