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⌂ ∞ Elite on the BBC Micro and NES

Market: PrintNumberInHold

[NES version, Bank 0]

       Name: PrintNumberInHold                                       [Show more]
       Type: Subroutine
   Category: Market
    Summary: Print the number of units of a specified item that we have in the
             hold

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * TT151 calls PrintNumberInHold




 Arguments:

   QQ29                 The item number



.PrintNumberInHold

 SETUP_PPU_FOR_ICON_BAR ; If the PPU has started drawing the icon bar, configure
                        ; the PPU to use nametable 0 and pattern table 0

 LDY QQ29               ; Set Y to the current item number

 LDA #3                 ; Set A = 3 to use as the number of digits below

 LDX QQ20,Y             ; Set X to the number of units of this item that we
                        ; already have in the hold

 BEQ PrintSpacedHyphen  ; If we don't have any units of this item in the hold,
                        ; jump to PrintSpacedHyphen to print two spaces, a "-",
                        ; and two spaces

 CLC                    ; Otherwise print the 8-bit number in X to 3 digits, as
 JSR pr2+2              ; we set A to 3 above

 JMP TT152              ; Print the unit ("t", "kg" or "g") for the market item,
                        ; with a following space if required to make it two
                        ; characters long, and return from the subroutine using
                        ; a tail call