HP 9100B Operating & Programming Manual page 5

PREFACE
2. The 91008 has subroutine capability which is controlled
by the 'SUB / RETURN' instruct1on (see Pages 60 and
94 ).
3.
An extra recall instruction. 'to x from' (x~t J), is available
to recall data from the ( , ) numeric and ( ) alphameric
registers (see Page 38 ).
4. ln the 'RUN' mode, 'STEP PRGM' no Ionger causes an im·
mediate branch except when a 'not met' 'I F' qua Iiter 1s
encountered (see 'EDITING A PROGRAM' on Page 76 ).
ln the 'PROGRAM' mode, as 'STEP PRGM' is pressed , the
X register displays the address and operation (as before)
and the Z register displays the next address and operation.
5.
Conditional branching remains as in the 9100A except
that the plus ( + ) and minus ( ) signs cannot follow an
'I F' instruction un less they are pa rt of an add ress.
'CONT(inue)' cannot be used as a 'no operation ' after an
'IF' instruction if 'CONT' is tobe followed by an alphameric
or sign (-t or ) instruction.
6. When storing or recalling data, the sign of the page ts al -
ways required if the storage register is on the ( ) page;
the sign of the page is never required lf the storage regts-
ter is on the ( t ) page. Thts is true regardle ss of wht ch
page contains the 'store' or 'recall' instructions.
7. Operation of the 'ACC
~
·, 'ACC ' and 'RCL' keys is exactly
as 1n the 9100A in that only the ( )e and ( )
f
registers
a re affected.
'CLEAR' clears the ( )
e . ( )
f , X.
Y and
Z
registers
and the 'ARC' and 'HYPER' conditions, as tn the 9100A.
8. 'END' is not a required last in structton in a program whtch
is to be recorded on a magnetic card (see ' END' on Page
70 ).
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