// // Wait 1 ms (1000 usec) // // On NTSC this means 1023 cycles (slightly less on PAL, but we have to be sure). // We can't count on badlines, as the screen might be disabled. // Delay here is implemeented using VIC-II raster register. Since one raster is // 63 cycles, we need at least 17 full rasters to be 100% sure we wait enough iec_wait1ms: ldx #18 // we probably won't start with the beginning of raster lda VIC_RASTER !: cmp VIC_RASTER beq !- lda VIC_RASTER dex bne !- rts