Aaron Wohl

claude-skills

Open source skills for Claude Code — reusable knowledge, algorithms, and reference data packaged as .claude/skills/ markdown files. Includes iPhone/iPad screen geometry with exact superellipse math for squircle corner computation.

smalltalk80-2026

Modern VM for Smalltalk-80.

st80-images

Public asset mirror for smalltalk80-2026 — Xerox Smalltalk-80 v2 virtual image and companion files.

iospharo

Pharo Smalltalk VM for iOS and Mac Catalyst — interpreter-only (no JIT), with low-bit oop encoding for ASLR compatibility.

droidpharo

Pharo Smalltalk VM for Android.

pharo-headless-test

Headless Pharo test runner with fake GUI — click menus, take screenshots, run SUnit without a display.

soogle

Smalltalk code search engine — indexes packages across Pharo, Squeak, GemStone and more.

validate_smalltalk_image

Standalone validator and export tool for Spur-format Smalltalk image files. Validates heap integrity, class tables, methods, and reachability.

phograph

[under construction] Visual dataflow programming language for macOS, inspired by Prograph.

phographw

[under construction] Windows port of the Phograph visual dataflow programming language, inspired by Prograph.

qxDOS

DOSBox-based DOS emulator for iPad and Mac — runs FreeDOS games including DOOM. SwiftUI interface with disk image management and downloadable game catalog.

dosiz

MS-DOS emulator for Linux — dosbox-staging CPU plus cpmemu-style syscall translation.

cpmemu★ 5

Run CP/M programs under Linux or Windows with no CP/M disk image. Translates BDOS/BIOS calls directly to the host filesystem. Supports 8080 and Z80.

uc80

Super optimizing C compiler targeting Z80 processor and CP/M operating system.

uc386

C23 compiler targeting Intel 386 (x86-32) and MS-DOS. Shares frontend with uc80 via uc_core.

uc_core

Shared C23 frontend and AST optimizer for the uc80 (Z80/CP/M) and uc386 (x86-32/MS-DOS) retro C compilers.

romwbw_emu

Linux/MacOS RomWBW Z80 emulator with 512KB ROM + 512KB RAM bank switching. Run RomWBW and CP/M in browser or CLI.

Run RomWBW on the web

z80cpmw

Z80 CP/M emulator for Windows (RomWBW). Native Windows build of the RomWBW emulator.

cpmdroid

Z80 CP/M emulator for Android (RomWBW). Native Android build of the RomWBW emulator.

Download APK

ioscpm

Z80 and CP/M emulator for iOS and MacOS. Available on the App Store as Z80CPM.

uada80

[under construction] Ada compiler targeting Z80 processor, aiming for ACATS compliance.

learn-ada-z80

[under construction] Learn Ada by programming for the Z80.

mbasic★ 2

Modern Python MBASIC 5.21 Interpreter & Compilers. Reviving Microsoft BASIC from the CP/M era.

Run MBASIC on the web | Documentation

mbasicc

A modern C++ implementation of Microsoft BASIC-80 version 5.21. Full interpreter with REPL, file I/O, and error handling.

mbasicc_web

WebAssembly build of mbasicc. Run MBASIC 5.21 in the browser.

scelbal

SCELBAL BASIC interpreter translated from 8008 to 8080. A compact BASIC fitting in under 9KB.

mbasic2025

MBASIC 5.21 reconstructed 8080 sources that assemble. 4K, 8K and extended BASIC sources.

ucow

Unix/Linux Cowgol to Z80 compiler. Compile modern code for classic Z80 processors.

um80_and_friends★ 1

8080/Z80 macro assembler, linker and related utilities.

uplm80

Modern PL/M-80 compiler targeting 8080 and Z80 assembly. Rebuild original CP/M utilities from PL/M source.

upeepz80

Universal Peephole Optimizer for Z80 - pure Z80 assembly input/output.

upeep80

Universal peephole and AST optimizer for 8080/Z80 compilers.

mpm2

MP/M II Emulator for Z80 - Multi-user operating system emulator. Supports SSH/SCP/SFTP/HTTP to MPM2 filesystem.

80un

Unpacker for CP/M compression and packing formats (8080).

plox

LR(1)/GLR parser generator. Emits canonical JSON parser tables plus re-entrant driver skeletons in C, C++, Python, and Lua.

retro_docs

Historical retro computing documentation — PDFs and text conversions.

hearzork

Voice-controlled Z-machine interpreter for the visually impaired. Play classic interactive fiction games like Zork entirely by voice on iOS and macOS.

zwalker

[under construction] Z-Machine Interpreter & AI-Powered Game Solver. 100% CZECH compliance (1,604 tests). Automated walkthrough generator for interactive fiction.

z2js

[under construction] Compile Infocom .z files (V1-8) to JavaScript for browser or Node.js. Play classic text adventures anywhere.

z2pdf

Generate PDF documentation with maps and vocabulary extracted from Infocom .z story files.

zorkie

[under construction] A ZIL/ZILF to Z-machine compiler supporting versions 1-8.

periodic

Resumable replacement for run-parts / cron.daily — per-script completion tracking so re-runs skip what already succeeded this period.

xojo_AVW_utils

Xojo utilities useful across many projects.

xojo_AVW_settings

Xojo library to read string and integer settings from a config file.

xojo_documentation

General documentation about working with Xojo, Git, and GitHub.

ICC Chess Projects — Internet Chess Club bot and libraries (legacy ICC software)