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S > SHARP  > X1 Turbo   

X1 Turbo

The Turbo serie was launched simultaneously with the X1 serie.

The X1 Turbo has enhanced graphic features. It also has additional hardware compared to the X1 serie: DMAC, CTC and SIO as standard. CTC & SIO can be however implemented on X1 serie through additional FM sound board or Mouse/Rs-232C board. But DMAC can not.

Turbo series has a special "KANJI" V-RAM, compared to X1 series which has only one way to display "KANJI" symbols, a heavy task for the Z80A: to display 1 "KANJI" character, 96 bytes of data are transfered to the V-RAM. As opposed, Turbo series just send 3 bytes of data (2 bytes for shift JIS code, and another 1 byte for attribute) to the "KANJI" V-RAM. Among the 8-bit systems, only the X1 Turbo serie and MZ-2500 have this special V-RAM. The access time is almost null, compared to the X1's V-RAM which is slower.

In the same way, it takes from 2 to 8 seconds to define P.C.G (user generated characters, similar to sprites) with the X1 serie, while it takes only 0.5 seconds with the Turbo serie. The MZ-2500 is also equiped with this feature.

There were in fact three models:
- Model 10: built-in tape recorder, no KANJI ROM, only 48 KB V-RAM (additional 48 KB available as an option),
- Model 20: one 5.25" disk drive instead of the tape recorder,
- Model 30: two 5.25" disk drives

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
NAME  X1 Turbo
TYPE  Home Computer
YEAR  1984
KEYBOARD  separated full-stroke keyboard with numeric keypad
CPU  Sharp Z80 A
RAM  64 KB
ROM  128 KB + 40 KB
TEXT MODES  20 / 40 / 80 x 10 / 12 / 20 / 25
GRAPHIC MODES  320 x 200 / 640 x 200 / 320 x 400 / 640 x 400
SOUND  3 voices PSG
SIZE / WEIGHT  Main unit: 390(W) x 390(D) x 108(H) mm / 11 Kg
Keyboard: 390(W) x 185(D) x 35(H) / 1.3 Kg
I/O PORTS  2 x I/O ports, 2 x joysticks (Atari), audio out, keyboard, printer
BUILT IN MEDIA  2 x 5.25'' FDD
PRICE  Model 10: 168 000 yen (Japan, 1984)
Model 20: 248 000 yen (Japan, 1984)
Model 30: 278 000 yen (Japan, 1984)

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