You must have
a jump instruction for a loop.
Weird programing and computing... different topic.
I'm not sure you would count it as a CPU, but the TI-55 programmable
calculator lacked any type of jump or branch instruction, IIRC. All
A number of early--ish programmable calcualtors had programming languages
which simplye recorced keystrokes with no jumps or loops or conitionals
of any kind.
Sometimes there was an implicit 'goto 0' if you tried to execute past the
end of memory. And often execution would stop[ if there was an error.
Which let to one way to hack a simple loop on such machines.
-tony