V9990DisplayTiming.hh

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#ifndef V9990DISPLAYTIMING_HH
#define V9990DISPLAYTIMING_HH
 
namespace openmsx {
 
struct V9990DisplayPeriod
{
        const int cycle;
        const int blank;
        const int border1;
        const int display;
        const int border2;
};
 
class V9990DisplayTiming
{
public:
        static constexpr int UC_TICKS_PER_SECOND = 3579545 * 12; // 42.9MHz
 
        static constexpr int UC_TICKS_PER_LINE = 2736;
 
        static constexpr auto lineMCLK = V9990DisplayPeriod{
                V9990DisplayTiming::UC_TICKS_PER_LINE, 400, 112, 2048, 112};
 
        static constexpr auto lineXTAL = V9990DisplayPeriod{
                V9990DisplayTiming::UC_TICKS_PER_LINE, 372,   0, 2304,   0};
 
        static constexpr auto displayNTSC_MCLK = V9990DisplayPeriod{262, 15, 14, 212, 14};
 
        static constexpr auto displayNTSC_XTAL = V9990DisplayPeriod{262, 15,  0, 240,  0};
 
        static constexpr auto displayPAL_MCLK = V9990DisplayPeriod{313, 15, 41, 212, 37};
 
        static constexpr auto displayPAL_XTAL = V9990DisplayPeriod{313, 15,  0, 290,   0};
 
 
        [[nodiscard]] static constexpr int getUCTicksPerFrame(bool palTiming) {
                return palTiming ? (displayPAL_MCLK.cycle  * UC_TICKS_PER_LINE)
                                 : (displayNTSC_MCLK.cycle * UC_TICKS_PER_LINE);
        }
};
 
} // openmsx
 
#endif