HP HP-11C User Manual

Section 9: The Index Register 137/138
Indirect Line Number Branches and Subroutines
Program line numbers can be indirectly addressed by a branch or
subroutine instruction in almost the same way that labels are
indirectly addressed. As covered earlier, when an indirect branch
or subroutine instruction is executed with a positive nnnnn value
in Ry, execution transfers to the label addressed by nnnnn and
resumes. However, when an indirect branch or subroutine
instruction is executed with a negative nnnnn value in Rj,
execution transfers to the line number addressed by the absolute
value of =nnnnn.
If: ...then...
R, 1-7.00900 001 - Instruction
002- Instruction
003-[GT0](1] -
004- Instruction } Execution
nnnnn
Xxx
Yy
005-
Instruction
|
t}'ansfers
to
(default
.
line
007
and
t0
01)
006-
Instruction
|
resumes.
007- [f]{LBL]3 -
008- Instruction
008- Instruction

HP HP-11C Specifications

General

Brand	HP
Model	HP-11C
Category	Calculator
Language	English