Summary
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 edit
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 The ROM has been replaced by flash memory in these devices.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 edit
- Core circuitry
- Casing/Connectors
- integrated in a joystick (as if connected to port 2 of a real C64)
- five additional buttons (acting like keys)
- running from batteries only (four AA batteries)
- Composite video, monaural audio (RCA connectors)
- looks similar to a Competition Pro joystick
- Graphics
- Sound
- Memory
- CPU
- implementing a 6510 at 1 MHz
- DTV2 and later: Enhanced CPU (fast/burst mode, additional registers and opcodes, support for illegal ops of the 6510)
Built-in games edit
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 | Yes | No | |
| California Games | Epyx | No | Yes | |
| Silicon Warrior | Epyx | Yes | No | |
| Alleykat | Hewson | No | Yes | |
| Nebulus (Tower Toppler) | Hewson | |||
| Maze Mania | Hewson | No | Yes | |
| Paradroid | Hewson | |||
| Eliminator | Hewson | |||
| Cyberdyne Warrior | Hewson | |||
| Cybernoid | Hewson | |||
| Cybernoid II: The Revenge | Hewson | |||
| Ranarama | Hewson | |||
| Marauder | Hewson | No | Yes | |
| Head the Ball | Hewson | No | Yes | |
| Mission Impossibubble | Hewson | No | Yes | |
| Firelord | Hewson | |||
| Exolon | Hewson | |||
| Netherworld | Hewson | No | Yes | |
| Uridium | Hewson | |||
| Zynaps | Hewson | |||
| Speedball | Image Works | |||
| Bull Riding (from World Games) | Epyx | Yes | No | |
| Sumo (from World Games) | Epyx | Yes | No | |
| Flying Disk (from California Games) | Epyx | Yes | No | |
| Surfing (from California Games) | Epyx | Yes | No |
Hardware-modding edit
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
- Keyboard connector
- External joystick (Port 1 and 2)
- Floppy connector
- Power unit connector
- Fixing the palette problems of the PAL version (to some degree this is possible in software by adjusting palette entries)
- S-Video connector
- User port
- Original C64 casing and PS2 keyboard [2]
Additional hardware
- Data transfer cable (Parallel port (or USB/serial port via DTV2ser) to Joystick or user port)
- SD card interface 1541-III or MMC2IEC
Limitations edit
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 edit
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.
References edit
- ^ "The Commodore 64 bounces back to life as a Direct-To-TV plug and play Joystick!". GamesIndustry.biz. 3 February 2005. Archived from the original on 18 August 2006.
- ^ "C64DTV in original C64 case". Joco.homeserver.hu. Archived from the original on 2011-07-21. Retrieved 2011-07-19.
- ^ "Keyboard Twister by Shadowolf". Picobay.com. 2009-10-02. Archived from the original on 2011-07-15. Retrieved 2011-07-19.
External links edit
- DTV Hacking Wiki, archived from the original on 2013-04-14, retrieved 2013-08-06 - DTV versions overview, HOWTOs, DTV Programming guide
- The Official C64 DTV site - user manual plus some other information
- David Murray's Commodore DTV Hacking
- C64DTV stuff by tlr Flash Tool, ML-Monitor, PC<->DTV transfer system
- Mr. Latch-up's C64 DTV & Hummer Advice Column
- A page about the history of the device
- Details on fixing colour problem on PAL DTVs - Note that surface-mount soldering skills are required.
- DTVtrans, connecting a DTV to a PC via parallel port
- DTV2ser, connecting a DTV to a PC/Mac via USB or serial port
- Four ways to turn a C64 DTV into a C64 clone
- Grokk´s DTV Stuff DTVBIOS and DTVBASIC - make your DTV code-ready.
- dtvhacking.retrosafe.com
- http://dtvhacking.cbm8bit.com/v1/index.html
- https://www.gamesindustry.biz/articles/the-commodore-64-bounces-back-to-life-as-a-direct-to-tv-plug-and-play-joystick
- C64 DTV Games Joystick Specs and History