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nuclear@1
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1 #include "hwregs.h"
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nuclear@1
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2 #include "intr.h"
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nuclear@1
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3 #include "copper.h"
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nuclear@1
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4
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nuclear@1
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5 #define BPLSZ (320 / 8 * 256)
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nuclear@1
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6 static unsigned char fb0[BPLSZ];
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nuclear@1
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7
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nuclear@2
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8 extern uint16_t dbgval;
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nuclear@2
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9
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nuclear@2
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10 #define wait_vpos(x) \
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nuclear@2
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11 asm volatile ( \
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nuclear@2
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12 "0: move.l 0xdff004, %%d0\n\t" \
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nuclear@2
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13 "and.l #0x1ff00, %%d0\n\t" \
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nuclear@2
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14 "cmp.l %0, %%d0\n\t" \
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nuclear@2
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15 "bne 0b\n\t" \
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nuclear@2
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16 :: "i"((x) << 8) : "%d0")
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nuclear@2
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17
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nuclear@2
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18 #define wait_vblank() wait_vpos(300)
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nuclear@2
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19 #define wait_scanline(x) wait_vpos((x) + 0x2c)
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nuclear@2
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20
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nuclear@2
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21 #define clear_bpl(p) \
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nuclear@2
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22 asm volatile ( \
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nuclear@2
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23 "move.l %0, %%a0\n\t" \
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nuclear@2
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24 "move.l %1, %%d0\n\t" \
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nuclear@2
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25 "0: clr.l (%%a0)+\n\t" \
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nuclear@2
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26 "dbra %%d0, 0b\n\t" \
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nuclear@2
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27 :: "a"(p), "i"(BPLSZ / 4 - 1) \
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nuclear@2
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28 : "a0", "d0")
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nuclear@2
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29
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nuclear@2
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30 static uint32_t coplist[] = {
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nuclear@2
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31 COPPER_MOVE(REGN_BPL1PTH, 0),
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nuclear@2
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32 COPPER_MOVE(REGN_BPL1PTL, 0),
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nuclear@2
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33 COPPER_VWAIT(50),
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nuclear@2
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34 COPPER_MOVE(REGN_COLOR0, 0x00a),
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nuclear@2
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35 COPPER_VWAIT(60),
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nuclear@2
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36 COPPER_MOVE(REGN_COLOR0, 0x008),
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nuclear@2
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37 COPPER_END
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nuclear@2
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38 };
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nuclear@2
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39
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nuclear@1
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40 int main(void)
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nuclear@1
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41 {
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nuclear@1
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42 REG_INTENA = SETBITS(INTEN_VERTB | INTEN_MASTER);
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nuclear@1
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43
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nuclear@1
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44 REG_DMACON = CLRBITS(DMA_ALL);
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nuclear@2
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45 REG_BPLCON0 = BPLCON0_COUNT(1) | BPLCON0_COLOR;
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nuclear@1
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46 REG_BPLCON1 = 0;
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nuclear@1
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47 REG_DIWSTART = 0x2981;
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nuclear@1
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48 REG_DIWSTOP = 0x29c1;
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nuclear@1
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49 REG_DDFSTART = 0x38;
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nuclear@1
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50 REG_DDFSTOP = 0xd0;
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nuclear@1
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51
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nuclear@2
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52 REG_COLOR0 = 0x008;
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nuclear@2
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53 REG_COLOR1 = 0xaaa;
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nuclear@1
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54
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nuclear@1
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55 wait_vblank();
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nuclear@2
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56 coplist[0] = COPPER_MOVE(REGN_BPL1PTH, (uint32_t)fb0 >> 16);
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nuclear@2
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57 coplist[1] = COPPER_MOVE(REGN_BPL1PTL, (uint32_t)fb0);
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nuclear@2
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58 REG32_COP1LC = (uint32_t)coplist;
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nuclear@2
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59 REG_COPJMP1 = 0;
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nuclear@1
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60
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nuclear@2
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61 fb0[128 * 320 / 8 + 160 / 8] = 8;
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nuclear@1
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62
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nuclear@2
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63 REG_DMACON = SETBITS(DMA_BPL | DMA_COPPER | DMA_MASTER);
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nuclear@1
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64
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nuclear@2
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65 for(;;) {
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nuclear@2
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66 wait_vblank();
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nuclear@2
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67 }
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nuclear@1
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68
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nuclear@1
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69 return 0;
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nuclear@1
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70 }
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