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ShadowM's Commodore 64 Pages

(last updated 2014-05-19)
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1541 Ultimate thumbnail
1541 Ultimate with Ethernet
MMC Replay thumbnail
MMC Replay with RR-Net

I enjoy using and programming the Commodore 64 (one of the early home computers, for those of you who weren't there), and have a good collection of hardware and software. I'm mainly interested in operating systems and compilers, especially GEOS. (Scroll this page down for some content links.)

If you want, you can email me (shadowm at lyonlabs dot org).

I'm hosting a copy of the Q-Link source code for anyone interested in working on it.

A big topic of interest these days is Ethernet cards for the Commodore 64. On the right (click) are photos of my machines with 1541 Ultimate and MMC Replay cards mounted (in that second picture, there's a Retro Replay/RR-Net laying on top of the machine as well). I also own a 64NIC+ and one of Fotios' FB-NET cards.

In April 2010, I released geoLink, which is an IRC client for GEOS that uses one of these cards. See the page for documentation and source code.

But the big problem with all of the CS8900A-based cards is that it's necessary to have a TCP/IP stack running on the Commodore, which is really quite a stretch, in terms of both speed and memory. A newer generation of cards is beginning to appear, based on the WIZnet W5100, which has an on-board network stack. The best of the batch so far seems to be the Flyer, which implements networking as I/O commands sent to device #7. I have one of these, and accomplished more with it in the first few days than I did with a CS8900A-based card in the first month. If you don't have one yet, you need one; it makes the CS8900A cards obsolete. There are even IRC and Telnet clients for it... in fact, there's a version of the IRC client for PET machines! I gave a presentation about this card at ECCC 2012. UPDATE: The Flyer now supports streaming disk images over the network and opening server sockets!

Jonno Downes has released Kipper BASIC and BASIC on Bails, which let you write networked programs for your Commodore 64 in BASIC. It currently only supports RR-Net compatible (CS8900A-based) network cards. I've put up a page about these projects with disk images, API docs, and a copy of the presentation I gave at ECCC 2010.

Upcoming Commodore Shows:
ECCC / VCFMW will be September 13-14, 2014 in Lombard, Illinois. Make your reservations early!

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Here's what you can find here:

Pictures of my Commodore 64s.

A page of downloads. You'll find software, manuals, and articles there, including a lot of information about copy protection. There is also lots of good information on the operating systems and compilers page, including
  • A page about the GEOS operating system with downloads, documentation, programming tools, and some programming tips 'n' tricks.

  • A page about the Power C compiler, where you can find the compiler itself (with docs) along with some utilities for it.

  • A page about the PROMAL programming language, with complete disk images of the shell, compiler, libraries, and documentation.

A page about stereo SIDs, with history, hardware photos, and downloads.

A hardware page with photos and documentation for some of the more exotic items I own.

A CMD DOS primer with examples of the more detailed command-line usages.

  Pictures from Commodore shows I've been to:
ECCC/VCFMW 2013 (Chicago, September 28-29, 2013)
ECCC/VCFMW 2012 (Chicago, September 22-23, 2012)
ECCC/VCFMW 2011 (Chicago, September 24-25, 2011)
ECCC/VCFMW 2010 (Chicago, September 18, 2010)
C=4 Expo (Cincinnati, May 29-30, 2010)
Chicago Classic Computing (Chicago, April 24, 2010)
World of Commodore (Toronto, December 5, 2009)
ECCC (Chicago, September 26, 2009)
C=4 Expo (Cincinnati, May 23-24, 2009)
World of Commodore (Toronto, December 6, 2008)
ECCC (Chicago, September 27, 2008)
C=4 Expo (Cincinnati, June 28-29, 2008)
World of Commodore (Toronto, December 1, 2007)
ECCC (Chicago, September 29, 2007)
C=4 Expo (Cincinnati, May 5-6, 2007)
ECCC (Chicago, September 30, 2006)
CommVEx 2006 (Las Vegas, July 29-30, 2006)
C=4 Expo (Cincinnati, June 3-4, 2006)
World of Commodore (Toronto, December 3, 2005)
SWRAP Expo (Chicago, September 17, 2005)
SWRAP Expo (Chicago, September 4, 2004)