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OSU8 Microprocessor
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P1 Pointer RegisterThis is the 16-bit register that holds OSU8's P1 Pointer register. Either of two sources can load the register, depending on the state of SLEB, each of the four nibbles separately enabled by ENLB, ENLT, ENHB, and ENHT. The four separate nibble-wide load signals are required to support the 4-bit immediate load instructions, which can load the P1 register.
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