The OKITAC8300 super minicomputer was announced in 1988 and featured higher performance based on a 32-bit architecture, expanded memory space (64 megabytes), virtual memory, and processing for multi-tasking, multiple users, networking, databases and online transactions.
At the time, in the middle of the 1980s, the industry was shifting from closed systems, with SNA-based vertical distribution centered on a host computer, to open horizontally distributed systems. This was due to progress in networking, the advent of the personal computer and computerization of a wide variety of work types. The OKITAC8300 was developed in response to these trends.
In terms of hardware, the OKITAC8300 was equipped with a 3.5 MIPS processor (and later a 5MIPS multi-processor) based on dedicated CMOS LSI, a 64 megabyte main memory unit, a high-capacity external memory unit, versatile communications control, and various features for RAS design and duplicated function. These machines were used as small-scale host computers, department computers and servers.
There were six models in the OKITAC8300 Series: the cabinet type (Models 38, 58 and 68) used primarily for mid-size/large systems, and the desk-side type (Models 32, 52 and 62) used primarily for small/mid-size system in offices. Users selected the appropriate type based on the size of the intended system, and factors like future expandability and setup conditions.
Model32 | Model38 | Model52 | Model58 | Model62 | Model68 | |
---|---|---|---|---|---|---|
Announcement date | July 1988 | October 1990 | October 1991 | |||
CPU | 32bit dedicated CMOS LSI developed independently by Oki Electric Industry | |||||
Memory capacity | 16MB- 32MB |
16MB- 64MB |
16MB- 128MB |
16MB- 256MB |
16MB- 128MB |
16MB- 256MB |
Memory element | 1MbitDRAM | 1Mbit/4MbitDRAM | ||||
Memory access width | 16B | 32B | ||||
Cycle time | Read 560ns/16B | Read 780ns/32B | ||||
Write 560ns/16B | Write 520ns/32B | |||||
Number of instructions | 219 | |||||
Address space | 3GB (Logical space) | |||||
Cache memory | Data 32KB, Instruction 32KB | 256KB | ||||
Pipeline | 4 stage | 7 stage | ||||
Communication lines | Max. 32 lines | Max. 256 lines | Max. 32 lines | Max. 256 lines | ||
LAN | OKINET2000/20 (conforming to IEEE802.3), IEEE802.5 | |||||
Number of mountable packages | 12 slots | 36 slots | 12 slots | 36 slots | 12 slots | 36 slots |
Cabinet type | Desk-side type | Cabinet type | Desk-side type | Cabinet type | Desk-side type | Cabinet type |