GRI-909 Simulator Configuration

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 simulator is based on the 1969 preliminary reference manual, as well as a surviving program, the MIT Crystal Physics System.

Photographs (courtesy of Al Kossow):

Option Description Capacity
CPU and memory           GRI-909 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 15-Sep-2003 by Bob Supnik (bob AT supnik DOT org - anti-spam encoded)