Deja Vu #09 13 ноября 1999

Программирование

Coding - Conversion of numbers from the stack calculator in the character string.

(C) Ilya Morozov / Death Moroz
__________________________________________



  Conversion of numbers from the stack calculator

           a character string.



   With a built-in calculator, the results are on top of the 
stack kalkulyatornogo in integral form. To print them a routine

Print_FP.No it prints the standard tools, which are now rarely 
used. Typically, the program works with own procedures for 
printing, for example, 42 characters per line. It can be 
attributed to a new flow. But it must be pretty close 
communication with the operating system Spekki.Predpochtitelney 
simply convert that number into a string of characters and 
dispose of it at their discretion. But program for such a 
transformation will rather complicated and cumbersome. Simply 
take advantage of the ROM. 

   The first thing that comes to mind - Print_
FP. It prints the number from the top of the stack
calculator in the current thread. Means to
substitute procedure for deriving the symbol of the procedure 
sending bytes in memory. But far too cumbersome. However 
Print_FP with their work creates a symbolic representation 
numbers, and only then calls the routine. The buffer is in the 
workspace calculator at # 5CA1-# 5CAA.Eto two

memory calculator MEM3 and MEM4.
Now, simply as an Inference Procedure for the flow of supply 
and RET cause Print_FP, to consider a string

representation of numbers. This is easier, though
still need to fiddle with the channels. Simply
only use for this function
calculator STR $. Converter takes 7
bytes.

CONVERT RST # 28; call calculator

        DB # 2E, # 38; Teams calculator:

                           ; STR $ converts the number in the 
string. 

                           , Now on the stack the parameters of 
this 

                           ; Thong. In DE-address, in BC-length.

                           ; END_CALC - output from the 
calculator. 

        CALL # 2BF1; Sub-STK-FETCH rewritten
                           ; Vaeth number from the stack 
calculator 

                           ; In registers A, B, C, D, E. And 
since 

                           ; After surgery STR $ stack we find
                           ; Converge options thong, then they

                           , Transferred to a pair of DE and BC.

        RET



   That's it. It remains to copy the string
in a more secure place than the workspace
interpreter.