Miscellaneous - HP 9835A Programming Manual

48
The Processor and the Operating System
Miscellaneous
The following instructions are unclassifiable into any of the other groups.
Instruction
!::: .. ' ...... :::: .. {
I } [ T]
l. ........ ,; ......
va ue :' ., . .
Description
Null operation. This is exactly equivalent to LDA A.
The contents of any register can be treated as the current
instruction and executed. {value} is a numeric expression in
the range 0 through 31, indicating the register to be used.
The register is left unchanged, unless the instruction code
causes it to be altered. The next instruction to be executed is
the one in the word following the EXE, unless the code in the
executed register causes a branch.