Did the HP-65 record data?

[Don Shepherd]

(03-23-2017 02:22 PM)SlideRule Wrote:  

(03-22-2017 10:45 PM)teenix Wrote:  ... HP-65 is that R9 does not have a merged code, and this register is also used for various trig and comparison tests...

From the 65 Manual;

pg 59) Also notice the STO 9 and RCL 9 are not mergd. This serves as a helpful reminder that the HP-65 uses R9 to store intermediate results when using trigonometric functions, rectangular/polar conversions, or numerical comparison tests."
&
pg 84) The DSZ (decrement and skip on zero) key subtracts 1 from the contents of R1 and then tests for a non-zero value.

Although it is included in the merged key codes, R1 is also semi-reserved or serves a dual-role.

BEST!
SlideRule

SlideRule, I think R8 is used with DSZ, not R1.