Summary of symbols used by Diehl

Tentative attempt based on reviewing example programs in the documentation - descriptions used where no symbol is available.

Conventions used by Diehl

: divide operation

, decimal point

Symbols used for calculation

Change Sign Presumably, changes sign of the contents of the central unit, ie. multiply contents by -1 and replace. Displayed as an elongated minus sign , when pressed?

C Clear central unit? What about other registers?

V (0-9) copy from 'central unit' to numbered register

V-inverted (0-9) copy from numbered register to central unit

+/- add/subtract number in central unit to/from value in add/subtract register.

* move content of +/- register to central unit, (sets +/- register to 0). Common calculator symbol for final result for addition/subtraction sequence?

Diamond copy content of +/- register to central unit; (keeps +/- register content). Standard calculator symbol for subtotals - aka Lozenge.

X/: copy number in central unit into X/: register with multiply/divide operation to be applied to the number that follows (is the expression evaluated on-the-fly or only when final = is entered?)

= copy number in central unit unto X/: register, complete the calculation and copy (move?) result back to the  central unit (sets X/:- reg to 0?)

S add number in central unit to accumulator. (Performs an  = operation first, subject to content of X/: register. See use here & schematic).

S variation of the above?

*S move accumulator content to central unit, similar to * symbol above?

Diamond_S            copy accumulator content to central unit, similar to Diamond symbol above?

Symbols used for Program definition/learning

P (0-9) start definition of program in numbered program register

<number>#            input number to central unit

#                               print central unit content

J (0-9) jump to numbered program register 

CJ (0-9) (conditional jump) - jump to numbered program register, if content of central unit is greater than or equal to 0. This simple command enabled 'true' programming.

A end program definition (stop learning)

Symbols used for Program execution

(In addition, in the examples seen, registers are cleared before starting to run programs, with a sequence like this: *  *S 1, = )

START1,START2 Deltronic-P - start program in program register 1 or 2

J (0-9)                    Combitron-S/Combitronic  - to start executing numbered program register?

? stop a program

A entered by user after input of data, ie. like Enter key on standard keyboard.

P V_inverted (0-9) print the contents of numbered program register as a 14 or 15 digit number, referred to as a Zifferncode in the documentation. To make rekeying easier next time, if no paper tape available, or to allow for easier entry of printed programs such as ones published in brochures?

<Zifferncode> P V  (0-9) no example seen, but perhaps the way to enter a program in a register as a Zifferncode?