HP67 - How to display the mantissa

[Mike T.]

I have never owned a real HP67 only use my HP67 simulator occasionally so I may have missed something obvious but on (most of) the Spice and the Voyager you can display the mantissa using 'clear prefix', or 'mant' functions.

However, I can't see a way to achieve the same thing on the HP67. Was this feature only introduced later? The first machine I owned was an HP31E and I know that could do it.

[teenix]

I don't think the 67 has that function.

You can use DSP 9 to display similar result.

cheers

Tony

[Dave Britten]

(11-23-2022 08:15 PM)teenix Wrote:  I don't think the 67 has that function.

You can use DSP 9 to display similar result.

cheers

Tony

Yeah, just set FIX, DSP 9. The classic models had a wide enough display that they didn't have to abbreviate the mantissa when an exponent is present, so this will always give you the full 10-digit mantissa.

[Joe Horn]

(11-24-2022 03:41 PM)Dave Britten Wrote:  Yeah, just set FIX, DSP 9. The classic models had a wide enough display that they didn't have to abbreviate the mantissa when an exponent is present, so this will always give you the full 10-digit mantissa.

If the exponent is between -1 and -9, FIX mode hides the final digit(s). To be sure to see the entire mantissa, use SCI, DSP 9.

Example: pi / 10^6.
FIX, DSP 9 --> 0.000003142
SCI, DSP 9 --> 3.141592654-06