Tags » RetroChallenge

Micro Pascal: from code to p-code

The Micro Pascal cross-compiler is coming a long nicely. User-defined functions or procedures aren’t supported yet. Neither are 8-bit characters or strings. FOR loops, IF-THEN-ELSE statements and 16-bit (unsigned) arithmetic operations do work! 1,080 more words

Retrochallenge

Cherryside Addendum #1 - Others Bodges

Although Retrochallenge 04/2017 finished a few weeks ago, I have carried on with my project, making some improvements to my PS/2 keyboard interface for the 68HC11 microcontroller. 531 more words

Hardware

Writing software for the HD6309 computer: Micro Pascal

At the time of writing, the HD6309 computer does not have an operating system. It can, however, load binary/SREC files via the UART terminal. I have been using the LWTOOLS toolchain to write programs in MC6809/HD6309 assembly language. 334 more words

Retrochallenge

HD6309 computer design files

The HD6309 computer design files are available for download here. Press the ‘Clone or download’ button, then press ‘Download ZIP’.

Retrochallenge

HD 6309 Bootloader v1.1

The bootloader for the HD6309 computer got enhanced today. It now supports SREC format as input, instead of the custom format:

Retrochallenge

Post Retro Challenge update

Yesterday ended with the pizzazz of a wet newspaper when I couldn’t get the HD6309 computer working. Of course, I couldn’t just let this slide, so today I took another shot at bringing up the board. 605 more words

Retrochallenge

With a Cherry on the Side - Lessons Learned (Dijkstra be Damned)

This RetroChallenge project reached its’ target – decoding, reading, and reporting PS/2 keyboard scancodes with¬†a 68HC11 microcontroller using only internal resources (no external memory, no external I/O device controllers, no external logic, etc). 1,203 more words

Hardware