The GetWingSettings subroutine - Revs on the BBC Micro

       Name: GetWingSettings                                         [Show more]
       Type: Subroutine
   Category: Keyboard
    Summary: Get the front and rear wing settings from the player
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * HeadToTrack calls GetWingSettings


.GetWingSettings

 LDX #5                 \ Print "THE  PITS" as a double-height header at column
 JSR PrintHeader        \ 11, row 4, in blue text on a yellow background

 LDX #24                \ Print token 24, which shows the prompt "SELECT WING
 JSR PrintToken         \ SETTINGS > range 0 to 40" and a further prompt of
                        \ "rear > "

 JSR GetNumberInput     \ Fetch a number from the keyboard

 STA rearWingSetting    \ Store the entered number in rearWingSetting

 LDX #25                \ Print token 25, which shows a prompt of "front > "
 JSR PrintToken

 JSR GetNumberInput     \ Fetch a number from the keyboard

 STA frontWingSetting   \ Store the entered number in frontWingSetting

 JSR WaitForSpace       \ Print a prompt and wait for SPACE to be pressed

 RTS                    \ Return from the subroutine

[X]

Subroutine GetNumberInput (category: Keyboard)

Fetch a number between 0 and 40 from the keyboard

[X]

Subroutine PrintHeader (category: Text)

Configure and print a double-height header in screen mode 7

[X]

Subroutine PrintToken (category: Text)

Print a recursive token

[X]

Subroutine WaitForSpace (category: Keyboard)

Print a prompt, wait for the SPACE key to be released, and wait for SPACE to be pressed

[X]

Variable frontWingSetting (category: Driving model)

The front wing setting, as entered by the player

[X]

Variable rearWingSetting (category: Driving model)

The rear wing setting, as entered by the player