Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Method for detecting optical defects in transparencies
Image processing system, history management apparatus, image processing control apparatus and computer readable medium
Three dimensionally stacked memory and the isolation of memory cell layer
Endoglucanases
Image processing apparatus and image file management method
Thermal agglomeration of toner in laser cartridges to aid recycling
Cover for a standard flange for gas-insulated switchgear
  Randomly Featured Patents
Mirror-grating tuning arrangement for high resolution lasers
X-ray scanner
Semiconductor devices having double-sided hemispherical silicon grain electrodes
Process for the O-methylation of hydroxyaporphines
Bridged clays of improved thermal stability process for their preparation and utilization as catalysts
Method and device for the controlling of matrix displays
Method of electroless ag layer formation for cu interconnects
Bicycle transmission
Planarization of metal films for multilevel interconnects by pulsed laser heating
Cable terminal and cable assembly