Drawing the screen: ADD_CYCLES_CLC

       Name: ADD_CYCLES_CLC                                          [Show more]
       Type: Macro
   Category: Drawing the screen
    Summary: Add a specified number to the cycle count
  Deep dive: Drawing vector graphics using NES tiles
    Context: See this macro in context in the source code
 References: This macro is used as follows:
             * ClearBuffers uses ADD_CYCLES_CLC
             * ClearMemory uses ADD_CYCLES_CLC
             * ClearPlaneBuffers (Part 1 of 2) uses ADD_CYCLES_CLC
             * ClearPlaneBuffers (Part 2 of 2) uses ADD_CYCLES_CLC
             * SendBuffersToPPU (Part 3 of 3) uses ADD_CYCLES_CLC
             * SendNametableToPPU uses ADD_CYCLES_CLC
             * SendOtherBitplane uses ADD_CYCLES_CLC
             * SendPatternsToPPU (Part 1 of 6) uses ADD_CYCLES_CLC
             * SendPatternsToPPU (Part 3 of 6) uses ADD_CYCLES_CLC


 The following macro is used to add cycles to the cycle count:

   ADD_CYCLES_CLC cycles

 The cycle count is stored in the variable cycleCount.


 Arguments:

   cycles               The number of cycles to add to the cycle count


MACRO ADD_CYCLES_CLC cycles

 CLC                    ; Clear the C flag for the addition below

 LDA cycleCount         ; Add cycles to cycleCount(1 0)
 ADC #LO(cycles)
 STA cycleCount
 LDA cycleCount+1
 ADC #HI(cycles)
 STA cycleCount+1

ENDMACRO