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S > SEGA > Teradrive   


What a strange computer ! It was built by IBM (like the Atari Jaguar few years later) in Japan for Sega, and was sold only there.

It is an IBM PC AT compatible system mixed with a Sega Megadrive (Genesis) console. On the front panel, one can find a Megadrive cartridge slot, two joystick connectors, a reset button, a MD/PC switch, a volume slider, a headphone output, a power button, keyboard/mouse connectors (PS/2) and one 3.5'' disk drive.

Three models were released, a low-end Model 1, with 640k RAM and no HD, a Model 2 with two floppies and no HD and 1MB RAM, and the high-end Model 3, with one floppy, 2.5MB RAM and a 30MB drive. All three shipped with the same software and accessories.

Amstrad made later a similar computer called MegaPC.

NAME  Teradrive
TYPE  Home Computer
YEAR  May 1991
KEYBOARD  Full-stroke professional keyboard. 106 keys with function keys, cursor keys and numeric keypad
CPU  Intel 80286 + Motorola MC68000 + Zilog Z80A (used for sound system)
SPEED  10 MHz (80286) / 10 MHz (68000) / 3.58 MHz (Z80A)
CO-PROCESSOR  Megadrive customchips (?)
RAM  2.5 MB (512 KB onboard + two 1 MB SIMM RAMs)
VRAM  256 KB
ROM  128 KB
TEXT MODES  40 or 80 chars x 25 lines
GRAPHIC MODES  320 x 244 (Megadrive VDP Mode) / 320 x 200 (MCGA) / 640 x 480 (VGA)
COLORS  64 among 512 (Megadrive Mode) / 256 among 262144 (S/VGA Modes)
SOUND  FM Sound / PCM Sound (Megadrive) - Beeper (PC)
SIZE / WEIGHT  36 (W) x 33.4 (D) x 8 (H) cm / 5.6 to 6.2 Kg according to versions
I/O PORTS  RGB analog vide output, composite video output, 1 ISA slot, mouse, keyboard, serial (2) & parallel (1) ports, headphone output, 2 joystick ports
BUILT IN MEDIA  3.5'' disk-drive, 30 MB hard drive
PRICE  148,000¥ (Mod.1), 188,000 ¥ (Mod.2), 248,000 (Mod.3) (Japan, 1991)

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