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⌂ ∞ Elite on the BBC Micro and NES

Status: csh

[NES version, Bank 0]

       Name: csh                                                     [Show more]
       Type: Subroutine
   Category: Status
    Summary: Print the current amount of cash

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * PrintCtrlCode calls csh




 Print control code 0 (the current amount of cash, right-aligned to width 9,
 followed by " CR" and a newline).



.csh

 LDX #3                 ; We are going to use the BPRNT routine to print out
                        ; the current amount of cash, which is stored as a
                        ; 32-bit number at location CASH. BPRNT prints out
                        ; the 32-bit number stored in K, so before we call
                        ; BPRNT, we need to copy the four bytes from CASH into
                        ; K, so first we set up a counter in X for the 4 bytes

.pc1

 LDA CASH,X             ; Copy byte X from CASH to K
 STA K,X

 DEX                    ; Decrement the loop counter

 BPL pc1                ; Loop back for the next byte to copy

 LDA #11                ; We want to print the cash amount using up to 11 digits
 STA U                  ; (including the decimal point), so store this in U
                        ; for BRPNT to take as an argument

 SEC                    ; We want to print the cash amount with a decimal point,
                        ; so set the C flag for BRPNT to take as an argument

 JSR BPRNT              ; Print the amount of cash to 9 digits with a decimal
                        ; point

 LDA #226               ; Print recursive token 66 (" CR")
 JSR TT27_b2

 JSR TT162              ; Print two spaces and return from the subroutine using
 JMP TT162              ; a tail call