Resources Contact Us Home
Microcode control mechanism utilizing programmable microcode repeat counter

Image Number 7 for United States Patent #4556938.

A microcode control mechanism is provided for producing the sequences of microwords used to control the execution of processor instructions in a microprogrammed data processor. This microcode control mechanism includes sequence counter circuitry for supplying a sequence of numbers and a programmable logic array mechanism responsive to the processor instruction and to the sequence of numbers for producing a sequence of microwords needed to execute the instruction. The microcode control mechanism also includes repeat circuitry responsive to a predetermined microword produced by the programmable logic array mechanism for setting the sequence counter circuitry back to a count which is less than the current count for causing a selected portion of the microword sequence to be repeated. The microcode control mechanism further includes a programmable repeat counter for counting the number of times the selected portion is repeated and for disabling the repeating action after a selected number of repeats.

  Recently Added Patents
Profiling activity through video surveillance
Electrode material and use thereof for production of electrochemical cells
Microfluidic cartridge and method of using same
Process for preparation of Efavirenz
Soybean cultivar CL1013665
Opportunistic modem
  Randomly Featured Patents
Compositions containing 5-fluoro-2',3'-didehydro-2',3'-dideoxycytidine or a mono-, di-, or triphosphate thereof and a second antiviral agent
Masking material for holes of a component
Device for mounting an additional device to a firearm
Optical semiconductor device having a semiconductor laminate mirror
Cephalosporin antibiotics
Checkerboard cookie package game
Dunnage-free shipping assembly
Photocomposing machine and method
Game console