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.
| 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) |
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| 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 -OS: UNIOS/F1 -Easy language 'TASKFORCE', COBOL |
-Multi-billing, batch, online processing -OS: UINIOS/F1 -Easy language 'TASKFORCE',COBOL |
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(Note) The above specifications are from the time of announcement, and may have been changed due to later improvement.
