Sega TeraDrive
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| Sega TeraDrive | |
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| Manufacturer | IBM (for Sega) |
| Type | Video game console / Personal computer |
| Generation | Fourth generation (16-bit era) |
| First available |  May 31, 1991[1] |
| CPU | 16-bit Intel 80286 |
| Media | Cartridge, Diskette |
| Backward compatibility |
Sega Mega Drive |
The TeraDrive was a 16-bit PC with an integrated Mega Drive, manufactured by IBM for Sega. The system was only released in Japan, though proved to be unpopular with the Japanese market. It shipped with a software development kit (SDK) which made it possible to develop your own Mega Drive games.
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[edit] Overview
The TeraDrive allows Mega Drive games to be played the same time as the PC section is being used, as it is possible for the Mega Drive and PC hardware to interact with each other. A good example of this is shown in the Puzzle Construction program which is mentioned in the Software Development Kit section. The operating system shipped with the system was IBM's DOS J4.0/V, which was similar to that of Windows 3.0.
[edit] Specification
Three models were available, ranging from ¥148,000 (USD $1100/GBP £580) to ¥248,000 (USD $1840/GBP £950). A monitor which was manufactured by a 3rd party company but with Sega branding, was available separately at a price of ¥79,800 (estimated USD $600/GPB £300 at the time), which was capable of displaying 15 kHz RGB video signals from the Mega Drive hardware and a 31 kHz VGA output from the PC hardware, both from the VGA connector.
The system's typical power consumption is in the region of 27 W.
| Specifications [2] | Model 1 | Model 2 | Model 3 |
|---|---|---|---|
| Price (at launch) | ¥148,000 | ¥188,000 | ¥248,000 |
| Processor | Intel 80286 (10 MHz), Motorola 68000 | ||
| RAM (available/max) | 640 KB/2.5 MB | 1 MB/2.5 MB | 2.5 MB/2.5 MB |
| Storage | 1 FDD | 2 FDDs | 1 FDD, 1 HDD (30MB) |
| Graphics Modes |
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| Input / Output Ports |
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| Operating System | IBM DOS J4.0/V | ||
[edit] Processors
One of the main processors used for the system is the Intel 80286, which was released in 1982. However, at the time when the TeraDrive was released in 1991, this processor was almost 10 years out of date, with the more powerful 25 MHz Intel 80486 having already been released 2 years prior in 1989, thus making the TeraDrive's central processor 2 generations behind its time. The system also contains a Motorola 68000 processor, the same processor which was used in the Mega Drive. This processor runs at 7.61 MHz in PAL consoles, and 7.67 MHz in NTSC consoles.
[edit] Peripherals
The system's peripherals which were included or available separately, included 2 × Mega Drive pads, 1 × PS/2 Mouse, 1 × Sega branded PS/2 IBM keyboard and 1 × 3-button joystick. The Mouse and Mega Drive pads were practically identical to those found on the Mega Drive console version.
[edit] Input/Output Ports
The machine's front panel ports included 2 × Mega Drive pad ports which were similar in design to 9-pin male serial ports, and 2 PS/2 ports the the right side of the unit to accommodate for the mouse and keyboard.
The system also contained several ports to its rear. In order from left to right: 9-pin male serial port, 25-pin parallel port for connection to a printer, stereo RCA jacks and composite NTSC video output for connection to a TV, analogue RGB for monitor connection, and a 2nd 9-pin male serial connector labelled "EXT", similar to that found on the rear of an original Mega Drive base unit.
The motherboard also had a spare ISA slot available for expansion, with a hole at the rear of the unit to accommodate this.
[edit] Software Development Kit
The machine included IBM drivers bundled on a floppy disk, which enabled properly written software to operate in the machine's RAM and then run on the native Mega Drive hardware. One of the very few software titles included with the TeraDrive was a Puzzle Construction program, which included a PC-side editor suite for changing the features of a falling-block puzzle game, then playable on the Mega Drive side.
There was often speculation that the TeraDrive was specifically designed as a purpose-made Software Development Kit, to allow software makers to develop their software titles for the Mega Drive. However, given the release date of the TeraDrive (some years after the initial Mega Drive release), as well as the availability of Sega's own game development hardware, it is unlikely the TeraDrive was designed for this purpose.
There is very little English information known about software development on the TeraDrive, and information which is known is relatively scarce.
[edit] Amstrad Mega PC
A similar, but unrelated system was manufactured by Amstrad and sold under the name Mega PC in PAL areas such as Europe and Australia. Its success was very shortlived due to its high retail price of £599 (about $1200). Given that it lacked several key features which the TeraDrive boasted, it made its price tag unattractive to consumers, even though both products were marketed in different countries. Although it boasted a higher specification than that of Sega's TeraDrive, it was unable to act as a Software Development Kit due to the inability to interact both the PC and the Mega Drive together, as it was essentially just a PC with a Mega Drive bundled inside.
[edit] See also
[edit] References
- ^ OLD-COMPUTERS.COM Museum ~ Sega Teradrive. Retrieved on 2006-11-22.
- ^ Sega / IBM TeraDrive. Retrieved on 2006-11-22.
