// Parameters for NTSC composite video
// Graphics is 304x216 pixels. This gives us 50 chars per line and 18 lines per screen
/*
#define C_VRES 234 //216 // Vert graphics resolution (pixels)
#define C_HRES 480//304 // Horiz graphics resolution (pixels)
#define C_LINE_N 262 //(525 / 2) // number of lines in NTSC frames
#define C_LINE_T 5080//5084 // Tpb clock in a line (63.55us)
#define C_VSYNC_N 3 // V sync lines
#define C_VBLANK_N (C_LINE_N - C_VRES - C_VSYNC_N) // Nbr of blank lines
#define C_PREEQ_N ((C_VBLANK_N/2) - 8) // Nbr blank lines at the bottom of the screen
#define C_POSTEQ_N (C_VBLANK_N - C_PREEQ_N) // Nbr blank lines at the top of the screen
#define C_PIX_T 9//11 // Tpb clock per pixel
#define C_HSYNC_T 374 // Tpb clock width horizontal pulse
#define C_BLANKPAD 4//8 // number of zero words (4 bytes each) before sending data

#ifdef OLIMEX
VRes = S.C_VRES;
HRes = S.C_HRES;
VC[0] = S.C_VSYNC_N;
VC[1] = S.C_POSTEQ_N;
VC[2] = S.C_VRES;
VC[3] = S.C_PREEQ_N;
SpiChnOpen(P_VIDEO_SPI, SPICON_ON | SPICON_MSTEN | SPICON_MODE32 | SPICON_FRMEN | SPICON_FRMSYNC | SPICON_FRMPOL, S.C_PIX_T);
OpenOC5(OC_ON | OC_TIMER3_SRC | OC_CONTINUE_PULSE, 0, S.C_HSYNC_T);
OpenTimer3(T3_ON | T3_PS_1_1 | T3_SOURCE_INT, S.C_LINE_T-1);