Calculator benchmark

[C.Ret]

Yes, in the HP-28S solver pressing (LEFT=), (RIGHT=) or (EXPR=) temporary display the value and its label on top of the display and enter the value in the stack where it is visible and stay here until the user drop it or clear the whole stack.

The (LEFT=) and (RIGHT=) appear only because I intentionally group the two formulae in one equality.

One big advantage of the Clamshell calculators is the full keyboard for direct alphabetic characters. In contrary to later series, the [alpha] key only serve in rare and specific command-line entries. Easy activation of numerous menus with rows of six soft-menu key spare a lot of prefix key when typing, setting or launching functions.



SHARP PC-1211

SETUP:

Code:

[MODE][MODE]                             2  Enter program mode
1 "A"AREAD A [ENTER]                    10 ["] are [shift][W], no need to type any space
2 "B"AREAD B [ENTER]                    10 AREAD is abbreviated as [A][.] 
3 PRINT AA+A-LN B,LN BB [ENTER]         18  PRINT is abbreviated as [P][.], the comma is [shift][O], no need to type any space 
[MODE][MODE]                             2  return to DEF mode (for easiest code launch)

Total 42 keystrokes to enter program and setup mode. Plese note the heavy use of implicit multiplication.

Code:

3.12  def-A  [CL]                           def-A is [shift][A] in def mode, [CL] is need when B is set to zero (clear error state)
             2.56  def-B                12  display X and Y on some screen
              .5B   def-B                5      "
              .5B   def-B                5      "      
2A    def-A                              4      "
2A    def-A                              4      "
2A    def-A                              4      "
              .32   def-B                5      "
              .16   def-B                5      "
             1.32   def-B                6      "
18.59 def-A                              7      "
17.63 def-A                              7      "
               2B  def-B                 4      "
               2B  def-B                 4      "

Total 72 keystrokes to input table values and systematically show X and Y on one display (or print the two values on printer is connected).


Score : 114 keystrokes
And the two X and Y results clearly displayed on both halfs of the display after each entry.

**EDIT: [CL] can be spare by entering B before A to avoid LN(0) error !