On 11/22/2022 1:34 PM, Paul Gorlinsky wrote:
The BASIC CPU hardware for zServer is a collection of POWER PC processors with some addition z Enhancements and the z is an EMULATOR because the last HARDWIRED CPU was probably the S/360 & S/370 model 195.
The basic IBM Z hardware instructions (like LOAD and STORE) are implemented directly in silicon. No emulation of any kind.
The complex instructions (like MOVE CHARACTER LONG and PERFORM LOCKED OPERATION) are implemented in millicode. Not sure I would call that emulation, but it does depend on a type of software programming. I think they're still using the PL8 compiler for this...
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