AN/UYK-8

The AN/UYK-8 used the same 30 bit word and instruction set of the AN/USQ-17 and AN/USQ-20 Navy Tactical Data System (NTDS) computers, but could have two processors instead of just one.

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 memory

Numbers were represented as 30 bit words, this allowed for five 6 bit alphanumeric characters per word.

The main memory was increased to 262,144 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.

		AN/UYK-8
		The AN/UYK-8 used the same 30 bit word and instruction set of the AN/USQ-17 and AN/USQ-20 Navy Tactical Data System (NTDS) computers, but could have two processors instead of just one. 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 memory Numbers were represented as 30 bit words, this allowed for five 6 bit alphanumeric characters per word. The main memory was increased to 262,144 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.
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