68K on Defender TD5

Driving a Macintosh SE/30 over a Serial Cable: AppleBridge on Real 68030 Hardware

Mon, 06 Jul 2026 15:24:17 +0200

This note records a first: AppleBridge running not in an emulator but on real 68030 hardware — a Macintosh SE/30 with no Ethernet at all — reached over a plain serial cable. The bridge negotiated its protocol, read the machine’s hard disk, and captured the SE/30’s own screen, all over RS-422 with no network and no MPW on the target. The interesting part, as usual, was not the success but the two faults on the way to it: a hardware bomb and a silent baud mismatch.

The Anatomy of AppleBridge: Daemon, Control Panel, INIT and Assembly Extensions

Sun, 05 Jul 2026 17:04:12 +0200

AppleBridge lets an AI drive a real Macintosh running System 7.6.1 (and Mac OS 9) as if it were a local shell: write C or 68K assembly on the host, compile, link, run and observe it on the classic machine, all over a single bridge. This note is a brief inventory of the pieces that live on the Mac — and of a deliberate split, where the ordinary logic is written in C and a handful of resident, trap-level extensions must be hand-written in 68K assembly.

Playing an Animated GIF in a System 7 About Box, Built in THINK C over the AppleBridge

Sun, 05 Jul 2026 16:16:49 +0200

A companion note to MacNetScan, where an animated About-box logo was promised and then defeated: every decoder on the host refused the supplied GIF, so the motion was faked in QuickDraw over a static picture. This note records the sequel. A decodable copy of the same artwork finally arrived, and the animation was done for real — sixteen true frames of a pixel-art title card, decoded and packed on the host, blitted frame by frame inside the About box of a System 7 application that was itself written and compiled in a 1994 THINK C IDE, driven end to end across the AppleBridge with no hands on the keyboard.