Introduced in 1969, the GRI-909 was the first system from the newly formed GRI Computer Corporation. Targetted for embedded and process control applications, the machine was very spare, with only one instruction format. The GRI-99 was a follow-on product with expanded capabilities (notably an index register). There was a third model, the GRI-919, but no documentation on it has been found yet. Documentation on peripherals (such as the line printer and disk) has also proved elusive.
Photographs (courtesy of Al Kossow):
| Option | Description | Capacity |
| CPU and memory | GRI-909 | 4KW - 32KW |
| GRI-99 | 4KW - 32KW | |
| CPU options | Extended arithmetic operator | |
| Console | S42-001 Teletype input | |
| S42-002 Teletype output | ||
| Paper tape | S42-004 High speed reader | |
| S42-006 High speed punch | ||
| Real time clock | line-time clock |
Updated 08-Aug-2020 by Bob Supnik (simh AT groups DOT io - anti-spam encoded)
