【Hitachi】 HITAC M-680 Processor Group E Model, HITAC M-660 Processor Group E Model

The M-680 Processor Group E Model and M-660 Processor Group E Model were general-purpose processor groups with an advanced system architecture, and an expanded memory mechanism as standard equipment.

The M-680 Processor Group E Models achieved a performance range of about 4.5 times in terms of the instruction execution speed ratio, from the M-680/160E entry model to the M-680/420E 4-way processor model. Similarly, the M-660 Processor Group E Models achieved a performance range of about 4.5 times in terms of the instruction execution speed ratio, from the M-660/120E entry model to the M-660/280E 2-way processor model. This made it possible to select the optimal processor to suit the required processing capacity. It was also easy to implement field upgrades to higher-end models.

M-680 Processor Group E Model Configuration Specifications
  160E 180E 210E 220E 320E 420E
Number of instruction processors 1 2 3 4
Buffer memory capacity 128KB 256KB 256KBx2 256KBx2 256KBx3 256KBx4
Main memory capacity 32-1,024MB 64-1,024MB 128-1,024MB
Number of channels 16-64 32-64 32-128 48-128 64-128
Announcement date April 1990
M-660 Processor Group E Model Configuration Specifications
  120E 140E 160E 180E 260E 280E
Number of instruction processors 1 2
Buffer memory capacity 32KB 64KB 64KBx2
Main memory capacity 32-512MB 64-512MB
Number of channels 8-32
Announcement date April 1990

 
HITAC M-680/210EHITAC M-660/160E