I think that Steve's "eternal quest for things to do" was simply a reference to the fact that the CPU always fetches another instruction after processing the last one, except when the last one was to load a wait state PSW.
-- Tom Marchant On Sat, 1 Jul 2023 13:15:37 -0500, Paul Gilmartin <[email protected]> wrote: >On Sat, 1 Jul 2023 10:22:23 -0400, Steve Smith wrote: > >>The "normal cause" is that an invalid opcode came up in the CPU's eternal >>quest for things to do. >> >"quest for things to do" sounds like speculative execution. What >happens to a program check in speculative execution? Does it >speculatively enter the exception handler, etc.? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
