C64 Direct-to-TV explained

The C64 Direct-to-TV, called C64DTV for short, is a single-chip implementation of the Commodore 64 computer, contained in a joystick (modeled after the mid-1980s Competition Pro joystick), with 30 built-in games. The design is similar to the Atari Classics 10-in-1 TV Game. The circuitry of the C64DTV was designed by Jeri Ellsworth, a computer chip designer who had previously designed the C-One.

Tulip Computers (which had acquired the Commodore brand name in 1997) licensed the rights to Ironstone Partners, which cooperated with DC Studios and Mammoth Toys in the development and marketing of the unit.[1] Released in late 2004, QVC purchased the entire first production run of 250,000 units and sold 70,000 of them on the first day that they were offered.

Versions

There exist multiple versions of the C64DTV. DTV1 (NTSC television type) comes with 2 MB ROM. It first appeared in late 2004 for the American/Canadian market. DTV2 (called C64D2TV sometimes) is a revised version for the European and world markets (PAL television type) and appeared in late 2005. The ROM has been replaced by flash memory in these devices. However, the DTV2/PAL version suffers from a manufacturing fault, which results in poor colour rendering (the resistors in the R-2R ladder DACs for both the chroma and the luma have been transposed). In the DTV3, a problem with the blitter was fixed.

Hardware specifications

Built-in games

The official games for the unit are mostly a mix of Epyx and Hewson C64 games. Games unique to the NTSC or PAL versions are noted below.

Title Developer Publisher NTSC PAL
Summer Games Epyx
Winter Games Epyx
Pitstop Epyx
Pitstop II Epyx
Super Cycle Epyx
Jumpman Junior Epyx
Impossible Mission Epyx
Impossible Mission II Epyx
Championship Wrestling Epyx
Gateway to Apshai Epyx
Sword of Fargoal Epyx
International Karate (World Karate Champion) Epyx
California Games Epyx
Silicon Warrior Epyx
Alleykat Hewson
Nebulus (Tower Toppler) Hewson
Maze Mania Hewson
Paradroid Hewson
Eliminator Hewson
Cyberdyne Warrior Hewson
Cybernoid Hewson
Hewson
Ranarama Hewson
Marauder Hewson
Head the Ball Hewson
Mission Impossibubble Hewson
Firelord Hewson
Exolon Hewson
Netherworld Hewson
Uridium Hewson
Zynaps Hewson
Speedball Image Works
Bull Riding (from World Games) Epyx
Sumo (from World Games) Epyx
Flying Disk (from California Games) Epyx
Surfing (from California Games) Epyx

Hardware-modding

Since the internal circuit board has exposed solder points for floppy-drive and keyboard ports, hardware modifications of the C64DTV are relatively simple.

Known hardware mods

Additional hardware

Limitations

The internal flash memory is accessible as device 1. However, software is not included to support write operations so high-score saving is not possible. Also, flash devices used in the DTV are specified for a very limited number of write accesses only.

When using the standard keyboard mod, the F7 key does not work. There is a workaround, the "Keyboard Twister."[3]

Software-modding

The DTV contains software-flashable memory. A number of tools have been released to compile programs into DTV-compatible flash images and load it onto the DTV. People made their own game compilations, adding popular (sometimes DTV-fixed) games that were not in the original DTV, added boot menus to make homebrew software development easier or enable new features, for example transfer programs like DTVtrans for transferring data from PC to DTV RAM and vice versa via the PC parallel port (or USB) and the DTV joystick port.

External links

Notes and References

  1. Web site: The Commodore 64 bounces back to life as a Direct-To-TV plug and play Joystick!. GamesIndustry.biz. https://web.archive.org/web/20060818061809/http://www.gamesindustry.biz/content_page.php?aid=7104 . 3 February 2005. dead. 18 August 2006 .
  2. Web site: C64DTV in original C64 case . Joco.homeserver.hu . 2011-07-19 . 2011-07-21 . https://web.archive.org/web/20110721105225/http://joco.homeserver.hu/mmc2iecKB/ . live .
  3. Web site: Keyboard Twister by Shadowolf . Picobay.com . 2009-10-02 . 2011-07-19 . 2011-07-15 . https://web.archive.org/web/20110715083346/http://picobay.com/dtv_wiki/index.php?title=Keyboard_Twister . dead.