minicomputers
Systems
Engineering Laboratories, Inc. [SEL]
SYSTEMS 810 - released Aug.1964
- This is a 16 bit computer made of RTL logic with channel I/O similar to IBM channels but less complex.
- There were four 810 machines.
- The 810 with channel I/O made of Sperry Semiconductor TIP circuits
and had a memory protect bit per memory location in a 4 foot tall 6
foot wide three foot deep cabinet that it shared with the 840.
- The 810A was the same size with unit I/O and BTCs.
- The 810a was refrigerator sized and contained Motorola RTL chips.
- The 810B which was SUHL TTL dips and had page protect. This was intended for time shared applications.
- The non B machines were intended for process control applications and
the program would be loaded once and never changed.
- This machine was supplanted by the 810-A in the same size but with the unit I/O structure that
was to be used in the 810-a and 810-b.
- Customers:
- NASA
- IBM
- GM Electromotive Division
- GM Technical center.
- Cycle time was 1.75 microseconds. Successive models ran at 750 nanoseconds.