Information processing apparatus having micro instructions store

Details Information processing apparatus having micro instructions store Information processing apparatus having micro instructions store

1987-10-28

1993-12-28

Rudolph, Rebecca L.

Boots, shoes, and leggings

364DIG1, 364258, 364259, 364260, 3642624, 3642628, G06F 100

Patent

active

052748294

ABSTRACT:
A data processing apparatus which allows a large number of micro instructions to be read at high speeds by storing frequently used micro instructions in the on-chip ROM and those less frequently used in the off-chip memory. From the address of the micro instruction to be accessed, it is determined whether the micro instruction is stored in the on-chip ROM or the off-chip memory, and the micro instruction is accessed on the basis of this determination. A cache memory may also be provided on the chip for providing high speed repeat access to micro instructions stored in the off-chip memory.

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