CP/M 2.2 running in a browser tab, converted from the original RunCPM to WebAssembly.

A browser-based DOS-prompt terminal that boots a self-hosted suite of classic emulators from numbered menus — 19 engines, 32 systems, nothing fetched at runtime.

Miscelania related to developing software for the TRS-80 Model 100 clone platform.

Programming tricks and techniques on the Intel 8085 CPU

VC83 BASIC for 6502

My implementation of the C compiler from Nora Sandler's book "Writing a C Compiler"

Learning C64 BASIC

OSS-Fuzz - continuous fuzzing for open source software.

Convert .CO M/L file to a loadable BASIC program in .DO format

Simple, zero-dependency garbage collection for C

C memory allocator with selectable First/Next/Best-Fit, per-allocation tracing, optional mark-and-sweep GC, and a configurable logging API for in-program diagnostics.

Tandy M100 game "Code Breaker" (in the style of Master Mind)

Interpreters for Tiny Basic written in Basic (various versions), C, C#, Java, Pascal, Python, VB.Net and others. Pure interpreters, e.g., not byte code, not even tokenized.

Tokenizer for Model 100 BASIC

A transcript of the TRS80 Model 100 schematic

An IDE, Assembler and emulator for Intel 8085. Includes various debugging tools and peripherals.

A simple Python based 8085 assembler, additional support for TRS-80 Model 100.

Programs and utilities for the Tandy TRS-80 Model 100/102/200

Reader Implementations of "Writing a C Compiler"

D2 is a strongly-typed, statically-typed, (mostly) inferred-type compiled language.

A lightweight Garbage Collector and a Memory Management System for C.

Data for PRs to the XLS repo

Arduino Display Library for SPI E-Paper Displays

8K RAM module for "Model T Computers" - TRS-80 Model 100, Kyotronic KC-85, NEC PC-8201, Olivetti M10

Mark-Sweep-Compact Garbage Collector built for C language

Games for the PET and Tandy 100/102/200

XLS: Accelerated HW Synthesis

"Smallest Possible Language" - a self-hosted compiler