HP-10 (KISS) Emulator

[teenix]

I entered the data into the emulator and the answer came up as 1.24000000

I didn't know about the MR key effect so I will try to amend things but changing this type of HP code can be thought provoking. I'll see if I remember how to do it :-)

cheers

Tony

(10-14-2020 10:38 PM)[kby] Wrote:  I haven't read the manual, but I'm sure this isn't in there. It is an odd effect of the fact that the HP-10 (sort of) rounds internally to the display. Unfortunately, I don't have access to Windoze machine to actually try the emulator, so I post this for those who might wish to try (and report back) with the emulator as wella s other HP-10s. Key sequence:

Keys Displays Comments
<Gold> 3 0.000 ;set display to FIX 3
1.240 1.240 ;enters number
+= 1.240
.001 .001 ;enters .001
- 1.239 ;Subtraction
<Gold>2 1.24 ;sets display to FIX 2; also rounds number
<Gold>8 1.24000000 ;FIX 8
.001 .001
+= 1.24000000 ;!

Note that directly adding 1.240 + .001 yields the expected 1.241.

Another oddity: MR always displays in Automatic (floating decimal point) mode,
regardless of the current display mode.