Routines 
Prev: 13627  Up: Map  Next: 13759 
The address of this routine is found in the table of addresses. It is called indirectly via fp_calc_2.
This subroutine performs the binary operation 'A$+B$'. The parameters for these strings are fetched and the total length found. Sufficient room to hold both the strings is made available in the work space and the strings are copied over. The result of this subroutine is therefore to produce a temporary variable A$+B$ that resides in the work space.


strs_add  13724  CALL STK_FETCH  The parameters of the second string are fetched and saved.  
13727  PUSH DE  
13728  PUSH BC  
13729  CALL STK_FETCH  The parameters of the first string are fetched.  
13732  POP HL  The lengths are now in HL and BC.  
13733  PUSH HL  
13734  PUSH DE  The parameters of the first string are saved.  
13735  PUSH BC  
13736  ADD HL,BC  The total length of the two strings is calculated and passed to BC.  
13737  LD B,H  
13738  LD C,L  
13739  RST 48  Sufficient room is made available.  
13740  CALL STK_STO  The parameters of the new string are passed to the calculator stack.  
13743  POP BC  The parameters of the first string are retrieved and the string copied to the work space as long as it is not a null string.  
13744  POP HL  
13745  LD A,B  
13746  OR C  
13747  JR Z,OTHER_STR  
13749  LDIR  
OTHER_STR  13751  POP BC  Exactly the same procedure is followed for the second string thereby giving 'A$+B$'.  
13752  POP HL  
13753  LD A,B  
13754  OR C  
13755  JR Z,STK_PNTRS  
13757  LDIR  
This routine continues into STK_PNTRS.

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