Main loop: MainLoop (Part 12 of 15)

       Name: MainLoop (Part 12 of 15)                                [Show more]
       Type: Subroutine
   Category: Main loop
    Summary: Spend at least 9 centiseconds processing lines from the
             linesToHide list
  Deep dive: Program flow of the main game loop
             Scheduling tasks in the main loop
    Context: See this subroutine in context in the source code
 References: No direct references to this subroutine in this source file


.main20

 LDA relatedPoints      \ If the relatedPoints list contains 35 or more entries,
 CMP #35                \ jump to main21 to skip the following three
 BCS main21             \ instructions

 JSR ProcessLinesToHide \ Process three lines from the linesToHide list, if
 JSR ProcessLinesToHide \ there are any unprocessed lines there
 JSR ProcessLinesToHide

.main21

 LDX #&70               \ Call OSWORD with A = 1 and (Y X) = &0070, which reads
 LDY #&00               \ the system clock and writes the result into the five
 LDA #1                 \ bytes from &0070 to &0074 (P, Q, R, S and T). For the
 JSR OSWORD             \ purposes of the call to CheckTimePassed, P is set to
                        \ the least significant byte of the time, which
                        \ increments 100 times a second

 JSR CheckTimePassed    \ If fewer than 9 centiseconds have passed since the
 BCC main20             \ first time we were here on this iteration of the main
                        \ loop, then we haven't yet spent enough time processing
                        \ lines from the linesToHide list, so jump back to
                        \ main20 to do a few more