Title :
A high-frequency custom CMOS S/390 microprocessor
Author :
Webb, Charles F. ; Liptay, John S.
Author_Institution :
IBM Corp., Poughkeepsie, NY, USA
Abstract :
The S/390 G4 CMOS processor is an implementation of the IBM ESA/390 architecture on a single custom CMOS chip. It is a new design which uses a straightforward pipeline both to achieve a fast cycle time and to speed the design cycle. The complex instructions are implemented using a highly privileged subroutines called millicode. To achieve high data integrity while maintaining a high clock frequency, the chip contains duplicate I- and E-units which perform the same operations each cycle and have their results compared
Keywords :
CMOS digital integrated circuits; computer architecture; data integrity; microprocessor chips; CMOS S/390 microprocessor; IBM ESA/390 architecture; S/390 G4; complex instructions; data integrity; high clock frequency; millicode; privileged subroutines; single custom CMOS chip; straightforward pipeline; CMOS logic circuits; CMOS process; CMOS technology; Circuit faults; Clocks; Hardware; Logic design; Microprocessors; Pipelines; Process design;
Conference_Titel :
Computer Design: VLSI in Computers and Processors, 1997. ICCD '97. Proceedings., 1997 IEEE International Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-8206-X
DOI :
10.1109/ICCD.1997.628874
