nuclear@1: #include "hwregs.h"
nuclear@1: #include "intr.h"
nuclear@1: #include "copper.h"
nuclear@1: 
nuclear@1: #define BPLSZ  (320 / 8 * 256)
nuclear@1: static unsigned char fb0[BPLSZ];
nuclear@1: 
nuclear@2: extern uint16_t dbgval;
nuclear@2: 
nuclear@2: #define wait_vpos(x) \
nuclear@2: 	asm volatile ( \
nuclear@2: 		"0: move.l 0xdff004, %%d0\n\t" \
nuclear@2: 		"and.l #0x1ff00, %%d0\n\t" \
nuclear@2: 		"cmp.l %0, %%d0\n\t" \
nuclear@2: 		"bne 0b\n\t" \
nuclear@2: 		:: "i"((x) << 8) : "%d0")
nuclear@2: 
nuclear@2: #define wait_vblank() wait_vpos(300)
nuclear@2: #define wait_scanline(x) wait_vpos((x) + 0x2c)
nuclear@2: 
nuclear@2: #define clear_bpl(p) \
nuclear@2: 	asm volatile ( \
nuclear@2: 		"move.l %0, %%a0\n\t" \
nuclear@2: 		"move.l %1, %%d0\n\t" \
nuclear@2: 		"0: clr.l (%%a0)+\n\t" \
nuclear@2: 		"dbra %%d0, 0b\n\t" \
nuclear@2: 		:: "a"(p), "i"(BPLSZ / 4 - 1) \
nuclear@2: 		: "a0", "d0")
nuclear@2: 
nuclear@2: static uint32_t coplist[] = {
nuclear@2: 	COPPER_MOVE(REGN_BPL1PTH, 0),
nuclear@2: 	COPPER_MOVE(REGN_BPL1PTL, 0),
nuclear@2: 	COPPER_VWAIT(50),
nuclear@2: 	COPPER_MOVE(REGN_COLOR0, 0x00a),
nuclear@2: 	COPPER_VWAIT(60),
nuclear@2: 	COPPER_MOVE(REGN_COLOR0, 0x008),
nuclear@2: 	COPPER_END
nuclear@2: };
nuclear@2: 
nuclear@1: int main(void)
nuclear@1: {
nuclear@1: 	REG_INTENA = SETBITS(INTEN_VERTB | INTEN_MASTER);
nuclear@1: 
nuclear@1: 	REG_DMACON = CLRBITS(DMA_ALL);
nuclear@2: 	REG_BPLCON0 = BPLCON0_COUNT(1) | BPLCON0_COLOR;
nuclear@1: 	REG_BPLCON1 = 0;
nuclear@1: 	REG_DIWSTART = 0x2981;
nuclear@1: 	REG_DIWSTOP = 0x29c1;
nuclear@1: 	REG_DDFSTART = 0x38;
nuclear@1: 	REG_DDFSTOP = 0xd0;
nuclear@1: 
nuclear@2: 	REG_COLOR0 = 0x008;
nuclear@2: 	REG_COLOR1 = 0xaaa;
nuclear@1: 
nuclear@1: 	wait_vblank();
nuclear@2: 	coplist[0] = COPPER_MOVE(REGN_BPL1PTH, (uint32_t)fb0 >> 16);
nuclear@2: 	coplist[1] = COPPER_MOVE(REGN_BPL1PTL, (uint32_t)fb0);
nuclear@2: 	REG32_COP1LC = (uint32_t)coplist;
nuclear@2: 	REG_COPJMP1 = 0;
nuclear@1: 
nuclear@2: 	fb0[128 * 320 / 8 + 160 / 8] = 8;
nuclear@1: 
nuclear@2: 	REG_DMACON = SETBITS(DMA_BPL | DMA_COPPER | DMA_MASTER);
nuclear@1: 
nuclear@2: 	for(;;) {
nuclear@2: 		wait_vblank();
nuclear@2: 	}
nuclear@1: 
nuclear@1: 	return 0;
nuclear@1: }