Jump to content

Search the Community

Showing results for tags 'Magicard'.

More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


  • Atari Systems
    • Atari General
    • Atari 2600
    • Atari 5200
    • Atari 7800
    • Atari Lynx
    • Atari Jaguar
    • Atari VCS
    • Dedicated Systems
    • Atari 8-Bit Computers
    • Atari ST/TT/Falcon Computers
  • Classic Consoles
  • Classic Computing
  • Modern Consoles
  • Gaming General
  • Marketplace
  • Community
  • Community
  • Game Programming
  • Site
  • PC Gaming
  • The Club of Clubs's Discussion
  • I Hate Sauron's Topics
  • 1088 XEL/XLD Owners and Builders's Topics
  • Atari BBS Gurus's Community Chat
  • Atari BBS Gurus's BBS Callers
  • Atari BBS Gurus's BBS SysOps
  • Atari BBS Gurus's Resources
  • Atari Lynx Programmer Club's CC65
  • Atari Lynx Programmer Club's ASM
  • Atari Lynx Programmer Club's Lynx Programming
  • Atari Lynx Programmer Club's Music/Sound
  • Atari Lynx Programmer Club's Graphics
  • The Official AtariAge Shitpost Club's Shitty meme repository
  • The Official AtariAge Shitpost Club's Read this before you enter too deep
  • Arcade Gaming's Discussion
  • Tesla's Vehicles
  • Tesla's Solar
  • Tesla's PowerWall
  • Tesla's General
  • Harmony/Melody's CDFJ
  • Harmony/Melody's DPC+
  • Harmony/Melody's BUS
  • Harmony/Melody's CDFJ+
  • Harmony/Melody's General
  • ZeroPage Homebrew's Discussion
  • Furry Club's Chat/RP
  • PSPMinis.com's General PSP Minis Discussion and Questions
  • PSPMinis.com's Reviews
  • Atari Lynx 30th Birthday's 30th Birthday Programming Competition Games
  • 3D Printing Club's Chat
  • Drivers' Club's Members' Vehicles
  • Drivers' Club's Drives & Events
  • Drivers' Club's Wrenching
  • Drivers' Club's Found in the Wild
  • Drivers' Club's General Discussion
  • Dirtarians's General Discussion
  • Dirtarians's Members' Rigs
  • Dirtarians's Trail Runs & Reports
  • Dirtarians's Wrenching
  • The Green Herb's Discussions
  • Robin Gravel's new blog's My blog
  • Robin Gravel's new blog's Games released
  • Robin Gravel's new blog's The Flintstones Comic Strip
  • Atari Video Club's Harmony Games
  • Atari Video Club's The Atari Gamer
  • Atari Video Club's Video Game Summit
  • Atari Video Club's Discsuuions
  • Star Wars - The Original Trilogy's Star Wars Talk
  • PlusCart User's Bug reports
  • PlusCart User's Discussion
  • DMGD Club's Incoming!
  • DASM's General
  • AtariVox's Topics
  • Gran Turismo's Gran Turismo
  • Gran Turismo's Misc.
  • Gran Turismo's Announcements
  • The Food Club's Food
  • The Food Club's Drinks
  • The Food Club's Read me first!
  • The (Not So) Official Arcade Archives Club's Rules (READ FIRST)
  • The (Not So) Official Arcade Archives Club's Feedback
  • The (Not So) Official Arcade Archives Club's Rumor Mill
  • The (Not So) Official Arcade Archives Club's Coming Soon
  • The (Not So) Official Arcade Archives Club's General Talk
  • The (Not So) Official Arcade Archives Club's High Score Arena
  • Adelaide South Australia Atari Chat's General Chat & Welcome
  • Adelaide South Australia Atari Chat's Meets
  • Adelaide South Australia Atari Chat's Trades & Swaps
  • KC-ACE Reboot's KC-ACE Reboot Forum
  • The Official Lost Gaming Club's Lost Gaming
  • The Official Lost Gaming Club's Undumped Games
  • The Official Lost Gaming Club's Tip Of My Tounge
  • The Official Lost Gaming Club's Lost Gaming Vault
  • The Official Lost Gaming Club's Club Info
  • GIMP Users's Discussion
  • The Homebrew Discussion's Topics
  • Hair Club for Men's Bald? BEGONE!


There are no results to display.

There are no results to display.


  • AtariAge Calendar
  • The Club of Clubs's Events
  • Atari BBS Gurus's Calendar

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...


  • Start










Custom Status



Currently Playing

Playing Next

Found 1 result

  1. For those who doesn't know, Commavid's Magicard is a cartridge (initially only sold as a bare board without a case) which allowed to write programs in machine code on the 2600. It has 1Kb of RAM, a 2Kb Monitor program in rom which allows to enter programs using two keyboard controllers and, by building an interface described in the manual, to save and load them using a tape recorder. There are subroutines in the rom to easily generate a 40x42 pixel graphic display, or 7 lines of text with 10 characters each. A reduced ascii charset was also stored in rom. The monitor includes a simple disassembler, an hex dump of memory and a function to calculate relative addresses for branch instructions on the fly. I learned a bit of assembly after joining AtariAge and discovering the homebrew scene. From that I also became interested in the early microcomputers like the KIM-1 or the Cosmac ELF, and got fascinated by Commavid's Magicard which shares a lot of similarities with them. At the time I first discover it, the repros were already out of productions and the original was (and still is) rare and way too expensive for me, so the only way I could try it out was through emulation. I remapped the keyboard controllers in Stella so that they are layed out next to each other and attached little labels on a spare keyboard to make it easy to use. I downloaded and printed the scans of the Manual available here on AtariAge, tried programming it and I LOVED it! Later I disassembled the code (that wasn't too hard, because the monitor is described in detail in the manual, including ram usage and address and function of every subroutine) and I hacked it to work on a supercharger. The hack was a little buggy but it worked and I could run all of the example programs on the manual (with some screen roll due to the slow access to supercharger RAM). With the advent of the Harmony cart, I could finally run the original bankswitch scheme on real hardware and I started again working on it. I made a Pal version and a slighty enanched version with a few bugfixes. Here they are if someone is interested (Although I'm probably the only one... ) ------------------------------------------------ PAL conversion: magicard.asm Magicard_PAL_conversion.bin Like the original but with color correction and 50Hz display (without black bars on top and bottom of the image, the display is actually stretched to fill the screen, so the aspect ratio is the same than on NTSC version). Here is a pdf version of the manual and overlays for the keyboard controllers you can print Magicard_Manual.pdf Magicard_Overlays.pdf ---------------------------------------------------------- Magicard+: magicard+_WIP_NTSC.bin magicard+_WIP_PAL.bin changes: - Fixed "JSR" addressing mode in disassembler (The original lists it as "absolute Y", instead of "Absolute". There's a note on chapter 4.3 of the manual) - Different font - RIOT RAM $A2 to $A9 isn't zeroed anymore upon reset. - Debounced RESET switch - The left four digits are now blanked while typing hex codes (The original shows garbage data instead) - "Unshifted" and "Shifted" mode (see Chapter 4) are now indicated by a different background color - Using of "Fetch", "Hex dump" and "Disassembly" functions in write area doesn't cause unwanted writes anymore. I couldn't make the cassette interface to work with any tape recorder, computer soundcard, mp3 player or anything else. I think old tape recorders used stronger audio levels and I'm not able to design a new interface that can work with modern devices. That's the main reason I left it in WIP state. If someone will come up with a functioning interface maybe I'll start working on it again and add some other features I had in mind.
  • Create New...