mirror of https://github.com/smartykit/apple1.git
42 lines
1.6 KiB
C
Executable File
42 lines
1.6 KiB
C
Executable File
/* This File contains the timing definitions for the TVout AVR composite video
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generation Library
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*/
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#ifndef VIDEO_TIMING_H
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#define VIDEO_TIMING_H
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#define _CYCLES_PER_US (F_CPU / 1000000)
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#define _TIME_HORZ_SYNC 4.7
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#define _TIME_VIRT_SYNC 58.85
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#define _TIME_ACTIVE 46
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#define _CYCLES_VIRT_SYNC ((_TIME_VIRT_SYNC * _CYCLES_PER_US) - 1)
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#define _CYCLES_HORZ_SYNC ((_TIME_HORZ_SYNC * _CYCLES_PER_US) - 1)
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// Timing settings for NTSC
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#define _NTSC_TIME_SCANLINE 63.55
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#define _NTSC_TIME_OUTPUT_START 12
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#define _NTSC_LINE_FRAME 262
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#define _NTSC_LINE_START_VSYNC 0
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#define _NTSC_LINE_STOP_VSYNC 3
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#define _NTSC_LINE_DISPLAY 216
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#define _NTSC_LINE_MID ((_NTSC_LINE_FRAME - _NTSC_LINE_DISPLAY) / 2 + _NTSC_LINE_DISPLAY / 2)
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#define _NTSC_CYCLES_SCANLINE ((_NTSC_TIME_SCANLINE * _CYCLES_PER_US) - 1)
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#define _NTSC_CYCLES_OUTPUT_START ((_NTSC_TIME_OUTPUT_START * _CYCLES_PER_US) - 1)
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// Timing settings for PAL
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#define _PAL_TIME_SCANLINE 64
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#define _PAL_TIME_OUTPUT_START 12.5
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#define _PAL_LINE_FRAME 312
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#define _PAL_LINE_START_VSYNC 0
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#define _PAL_LINE_STOP_VSYNC 7
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#define _PAL_LINE_DISPLAY 260
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#define _PAL_LINE_MID ((_PAL_LINE_FRAME - _PAL_LINE_DISPLAY) / 2 + _PAL_LINE_DISPLAY / 2)
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#define _PAL_CYCLES_SCANLINE ((_PAL_TIME_SCANLINE * _CYCLES_PER_US) - 1)
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#define _PAL_CYCLES_OUTPUT_START ((_PAL_TIME_OUTPUT_START * _CYCLES_PER_US) - 1)
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#endif
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