This was a processor group of small and mid-size general-purpose machines. This group simultaneously achieved both compactness and higher performance through innovations like development of a single card CPU which packed a high-performance CPU onto a single card, and increased speed and capacity of the magnetic disk unit.
The high-end model, the M-630, saved energy and space by using devices such as LSI for high-speed logic with 2,000/5,000 gates/chip, and highly integrated CMOS LSI with 40,000 gates/chip for channels.
The mid-size model, the M-630, and the low-end model, the M-620, were one-box systems with set-up areas, respectively, of 0.6m2 and 0.27m2. These systems were designed for office installation, being capable of using commercial 100V power and not requiring special air conditioning equipment.
The M-620/M-630/M-640 Processor Group E Models were enhanced versions of these machines.
| M-620 Processor Group |
M-630 Processor Group |
M-640 Processor Group |
|
|---|---|---|---|
| Number of models | 4 | 5 | 4 |
| Number of instruction processors | 1 | 1 | M-640/10, 20, 30: 1 M-640/40: 2 |
| Buffer memory capacity | - | - | 256KB |
| Main memory capacity | 8-32MB | M-630/10, 20: 8–-32MB M-630/30, 40:16-64MB |
M-640/10, 20, 30: 16-128MB M-640/40: 32-128MB |
| Number of channels | Max. 6 | Max.6 | M-640/10, 20, 30: 8-16 M-640/40: 16 |
| Announcement date | June 1988 | September 1987 | |
| M-620Processor Group E Model |
M-630Processor Group E Model |
M-640Processor Group E Model |
|
|---|---|---|---|
| Number of models | 4 | 6 | 6 |
| Number of instruction processors | 1 | 1 | 10E, 20E, 30E, 35E: 1 40E, 45E: 2 |
| Buffer memory capacity | - | - | 256KB |
| Main memory capacity | 8-32MB | 10E, 20E: 8-32MB 30E, 40E, 50E:16-64MB-96MB |
10E, 20E, 30E, 35E: 16-256MB 40E, 45E: 32-256MB |
| Number of channels | Max. 6 | 10E, 20E: Max. 8 30E, 40E, 50E, 60E: Max. 10 |
10E, 20E, 30E, 35E: 8-16 40E, 45E: 16-32 |
| Announcement date | May 1990 | ||
