【Fujitsu】 FACOM V0

In March 1972, Fujitsu, Uchida Yoko and USAC Electronic Industrial (currently PFU) formed a tie-up to achieve a close cooperative organization for the development, manufacturing and sale of small computers, ultra-small computers and billing computers. The FACOM V0was an office computer (a small business computer used in an office) jointly developed by Fujitsu and USAC Electronic Industry as a successor to Fujitsu's FACOM 230-10 and USAC Electronic Industry's USAC 720/90. It employed a virtual memory system and its aim was usage in a wide range of areas -- from billing functions to online processing. New innovations announced at the same time -- such as software unbundling (pricing separate from hardware) and establishment of 11 comprehensive "Sky Lab" service centers throughout Japan -- caused a sensation in the industry. In 1975, performance was enhanced, and the lower-end FACOM V0S was added. Then in the following year, the series was further enhanced with two floppy disk equipped models, the FACOM V0III and V0SIII.

FACOM V0Series Main Specifications
Model name FACOM V0S FACOM V0
Announcement date December 1975 August 1974
Main memory unit Memory device 4Kbit MOS-LSI memory
Cycle time 900ns/2B 800ns/2B
Capacity 16-32KB 20-48KB
CPU Control system Microprogram control
Word format Variable length (bit, byte)
Fixed length (half-word/word/double-word, 1 word=32 bits)
Instruction 114 instructions with 1 or 2 address, variable-length instruction format
Connected I/O Max. 10 devices + 1 line Max. 22 devices + 1 line
File unit Type Magnetic drum 262KB (built-in) 131/262KB
Magnetic disk 512KB/1MB (built-in) None
Magnetic disk cartridge 3 types, 2.45/4.9(2.45+2.45)/9.8(4.9+4.9)MB
Number of units Max. 3 (including built-in) Max. 4
Floppy disk 8inch x Max. 2, 243KB/drive
Other -Degradation model of FACOM V0
-Multi-billing, online processing
-Easy language 'TASKFORCE', COBOL
-Multi-billing, batch, online processing
-Easy language 'TASKFORCE',COBOL

(Note) The above specifications are from the time of announcement, and may have been changed due to later improvement.