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or that specified one of the registers 01 through 15 (decimal) as holding the address of the operand. The address was incremented. These instructions included load or add to accumulator, add accumulator to memory, add accumulator with carry to memory, multiply (producing a 22 bit signed product), skip if equal, skip and rotate, bit clear, bit set, and bit complement. Another instruction in this group was to display a bit map, to represent a character or other data, on the built-in CRT display screen.
* Half-word class - instructions operating

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