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kc85.zig

★ 55 Open GitHub ↗

A KC85 emulator written in Zig

// repository documentation

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> NOTE: this project has been superseded by https://github.com/floooh/chipz and has been archived

[![build](https://github.com/floooh/kc85.zig/actions/workflows/main.yml/badge.svg)](https://github.com/floooh/kc85.zig/actions/workflows/main.yml)

A simple KC85/2, /3 and /4 emulator for Windows, macOS and Linux, written in Zig. Uses the [sokol headers](https://github.com/floooh/sokol) for platform abstraction.

Read more about the KC85 computer series here:

- https://en.wikipedia.org/wiki/KC_85
- https://floooh.github.io/virtualkc/p010_kc85.html
- https://floooh.github.io/2017/01/14/yakc-diamond-scroll.html

Some [implementation notes](https://github.com/floooh/kc85.zig/blob/main/IMPLEMENTATION.md).

## Build

With Zig the 0.12.0 dev version, on Windows, macOS or Linux:
```
zig build
```
The default debug version will usually be fast enough. To build with optimizations use any of:

```
zig build --release=fast
zig build --release=small
zig build --release=safe
```
NOTE: On Linux you also need to install the ALSA, X11 and GL development packages.

## Build and start into KC85/2, /3 and /4

```
zig build run-kc852
zig build run-kc853
zig build run-kc854
```

Run ```zig build --help``` to see the remaining build targets.

> NOTE: when running any of the games, turn down your sound volume first. The raw square-wave sound can be a bit "aggressive". You have been warned ;)

## Run Digger

```
zig build run-kc853 -- -slot8 m022 -file data/digger3.tap
```
![Digger Screenshot](https://raw.githubusercontent.com/floooh/kc85.zig/main/screenshots/digger.webp)

Press [Enter] to start a new game round, and [Esc] to continue
after you died. Use the arrows keys to navigate.

## Run Jungle
```
zig build run-kc853 -- -slot8 m022 -file data/jungle.kcc
```
![Jungle Screenshot](https://raw.githubusercontent.com/floooh/kc85.zig/main/screenshots/jungle.webp)

Navigate with arrow keys, jump with [Space].

## Run Pengo
```
zig build run-kc853 -- -file data/pengo.kcc
```
![Pengo Screenshot](https://raw.githubusercontent.com/floooh/kc85.zig/main/screenshots/pengo.webp)

Navigate with the arrow keys, continue running against
an ice block to push or destroy the block.

## Run FORTH on the KC85/4
```
zig build run-kc854 -- -slot8 m026 data/forth.853
```

On the KC85/4's command line, first activate the module,
and then start Forth:

```
switch 8 c1[Enter]
forth[Enter]
```
(the characters will appear uppercase, don't worry, that's normal)

![FORTH Screenshot](https://raw.githubusercontent.com/floooh/kc85.zig/main/screenshots/forth.webp)

## Run in web browsers

Currently only running the 'plain' emulator is supported, it's not possible
to load files into the emulator (because command line parsing doesn't work
in browsers, and the Zig stdlib filesystem code doesn't work in
`wasm32-emscripten`):

```bash
zig build -Dtarget=wasm32-emscripten --release=fast run-kc854
```

On the first build, the Emscripten SDK will be downloaded and installed into
the global Zig cache, this might take a couple of minutes.

## Misc Stuff

For an instant nostalgia kick, start the KC85/4:

```
zig build run-kc854
```

...and then type this into the KC85/4 command line.

Make sure your audio volume isn't silent, but **don't** turn it up *too* much!

```
save f000 f800[Enter]
```
...type anything for the name, and hit Enter again :D

kc85.zig

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