Sharp X1

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The X1 series from Sharp is a series of home computers released in Japan. The first X1 computer was released in 1982. The computers were based on the Z80 CPU. The X1 line was followed by the X68000.

This is the first member of the X1 family. link Sharp X1 pictureDifficult to locate this computer in the Sharp family, it has some characteristics of the MZ 2000 but is not compatible with it.

The X1 family had a very great success in Japan, and the last models were very powerful. Go figure why Sharp didn't market these computers outside Japan… The most famous and strong feature of the X1 series is its Programmable Character Generator(PCG).

Tape Basic and Disk Basic were available but had to be loaded from tape. This is a concept that Sharp called "Clean Computer". X1 and MZ system (even X68000) do not have any Basic ROM or other OS ROM. They only have an "IPL ROM"(Initial Program Loader + IOCS) and a BIOS ROM. So if you want to use any OS with the X1 or MZ series, you have to load it from external storage devices.

Sharp designed the X1 series as an innovative multimedia system which could work with TV and video. The X1 series has advanced features to display graphics and text over TV screens (superimpose feature). The X1 could achieve teletext functions without any additional peripherals (only the special X1 TV monitor which can be also used as a TV).

Sharp also released a "color image board" which was video capturing unit. Though it was working with 8 colours only, the result was astonishing for the time! The X1 was a real pionneer in multimedia market, but most people in Japan never realized this. The X68000 series inherited from the X1 features.

Joe Repka reports : Bought one of these amazingly ahead-of-its-time computers when they first came out in Japan. First floppy device was a single-sided double-drive unit that cost 100,000 yen! SS floppy disks sold for about 1000 yen (USD 10.00) at that time.

[edit] Technical Info

NAME	X1 (CZ-800C)
MANUFACTURER	Sharp
TYPE	Home Computer
ORIGIN	Japan
YEAR	1982
KEYBOARD	Full-stroke keyboard
CPU	Sharp Z80 A
SPEED	4 MHz
RAM	64 KB
VRAM	4 KB (up to 48 KB)
ROM	6 KB
TEXT MODES	40 / 80 x 25
GRAPHIC MODES	320 x 200 / 640 x 200
COLORS	8
SOUND	3 voices PSG
SIZE / WEIGHT	Unknown
I/O PORTS	2 x I/O ports, 2 x joysticks (Atari), audio out, keyboard, printer
BUILT IN MEDIA	Tape
OS	CP/M ?
POWER SUPPLY	Built-in PSU
PRICE	155,000 yen (Japan)