The machine was the size and shape of an old fashioned double-door refrigerator, about six feet tall.
Instructions were represented as 30 bit words, in the following format:
f 6 bits function code j 3 bits jump condition designator k 3 bits partial word designator b 3 bits which index register to use y 15 bits operand address in memoryNumbers were represented as 30 bit words, this allowed for five 6 bit alphanumeric characters per word.
The main memory was 32,768 words of core memory.
The available registers were:
- one 30 bit arithmetic (A) register.
- a contiguous 30 bit Q register (total of 60 bits for the result of multiplication or the dividend in division).
- seven 15 bit index (B) registers.