Portfolio
Virtual machines that run Smalltalk on platforms it was never ported to. Tools that inspect and validate the images those virtual machines load. An implementation of Prograph, the visual dataflow language.
Interpreters written from the object memory up, verified against the reference implementations rather than against my own expectations.
Runs the 1983 Xerox Smalltalk-80 virtual image on macOS, Mac Catalyst, Linux and Windows. It boots to the desktop on all four. The virtual machine core is ported from dbanay/Smalltalk under MIT. This project adds the platform abstraction, the four frontends, the endian-aware image loader and packaging. Every platform reproduces the Xerox trace2 boot prefix — 499 bytecodes — exactly.
A Pharo Smalltalk virtual machine for iOS and Mac Catalyst. The interpreter runs stock Pharo 13 and 14 images with no just-in-time compiler, because iOS does not permit one. It passes 13,040 of 13,053 Pharo tests on Mac Catalyst (99.90%) and 99.55% on the iOS Simulator.
A public mirror of the 1983 Xerox virtual image, its sources file, and the trace2 and trace3 reference traces. smalltalk80-2026 fetches these files at run time, so you need no GitHub account to build it.
A Pharo virtual machine for Android built from the iospharo sources. It loads images and draws the GUI, but typical Android processors run the interpreter too slowly to be pleasant, so work stopped.
Everything here exists because a Smalltalk image is a live object graph. A corrupt one fails in ways a stack trace will not explain.
A standalone validator for Spur-format images from Pharo, Squeak and Cuis. It checks heap integrity, class tables, methods and object reachability. It writes per-object SHA-256 manifests, class hierarchy trees and reference graphs.
A headless test runner for Pharo, with a fake GUI. It clicks menus, takes screenshots and runs SUnit suites with no display attached — the piece you need before Smalltalk can go in CI.
A search engine for Smalltalk source code and videos. It indexes packages from GitHub, SqueakSource and SmalltalkHub, and labels each package with its dialect.
A reimplementation of Prograph, the early-1990s language where you draw the program as nodes and wires rather than as text.
Getting a Smalltalk image onto iOS, into CI, or through a validation gate is mostly a systems problem rather than a Smalltalk one: no JIT, no display, no tolerance for a corrupt object graph. If that is the wall you are at, I have been through it.