This is what I came here to say, but Dave Cole said it better. Every decent architecture I have seen has NOP and HCF (or in this case x'00') which have *defined* behaviour.
Don't mess with the classics. Roops On Fri, 20 Jun 2025, 10:13 David Cole, <[email protected]> wrote: > Hi Tom, > > There is a problem with using DC C'AB...' to trigger an intentional 0C1... > > Somewhere in the Principles, there is a statement, a promise if you > will, that... > - X'00' will never be used as a valid opcode. > - No such promise is made for X'C1'. > > ... > IHTH, > Dave Cole, Developer > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
