Recent content by tlindner@macmess.org

The S register is setup by BASIC to be a sane value for stack usage. But Color BASIC doesn't use U register as a stack. It uses it for calculations and parameter passing. To do so you need to load U with a value that points to unused memory. And can grow down.

Tony put errors in his schematics. So... there be dragons. Plus copyright infringement. :) If you really want a project, start with this one: http://www.sardis-technologies.com/coco/dmc/dmc.htm

There is a CoCo Utility called ROML. It's purpose is to load and execute ROM cartridge dumps. https://colorcomputerarchive.com/search?q=roml

I've decided to print some reproduction boxes. If you have a game collection with missing or crushed boxes, here is your chance to buy new boxes. Prices for the initial run: Flat box: $2.30 each Folded and glued Box: $3.50 each I'll ship anywhere. Buyer pays actual packaging/shipping. No...

Here is a picture of the proper CoCo joystick plug:

Multi-Pak Interface: http://www.ebay.com/itm/-/131336641077 Disto SCII, with 3 in 1 board: http://www.ebay.com/itm/-/131338197544

Includes: Mac External Floppy drive Keyboard Second keyboard, with some not working keys Numeric Keypad Mouse Photograph of Mac for sale: http://www.macmess.org/images/coco/Mac-Hero.jpg Located: California, Bay Area, 94520 (All offers should include a description of how you want the machine...

With the withdrawal of the Rainbow on Disc project, I've determined we needed a more distributed process of digitizing magazines. So I built a community digitization project web site: http://cocomag.dyndns.org/UnderColor.shtml Note, when I say digitizing I do not mean just scanning. I mean...

I am looking for one or two SID sound chips. If you have an extra or two please contact me.