cd: integrate new gfx code
[picodrive.git] / pico / cd / gfx_dma.c
CommitLineData
a93a80de 1/*
2 * PicoDrive
3 * (C) notaz, 2007
4 *
5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
7 */
8
9#include "../pico_int.h"
10
11#include "cell_map.c"
12
13#ifndef UTYPES_DEFINED
14typedef unsigned short u16;
15#endif
16
17// check: Heart of the alien, jaguar xj 220
18PICO_INTERNAL void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
19{
20 unsigned char *base;
21 unsigned int asrc, a2;
22 u16 *r;
23
24 base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
25
26 switch (Pico.video.type)
27 {
28 case 1: // vram
29 r = Pico.vram;
30 for(; len; len--)
31 {
32 asrc = cell_map(source >> 2) << 2;
33 asrc |= source & 2;
34 // if(a&1) d=(d<<8)|(d>>8); // ??
35 r[a>>1] = *(u16 *)(base + asrc);
36 source += 2;
37 // AutoIncrement
38 a=(u16)(a+inc);
39 }
40 rendstatus |= PDRAW_SPRITES_MOVED;
41 break;
42
43 case 3: // cram
44 Pico.m.dirtyPal = 1;
45 r = Pico.cram;
46 for(a2=a&0x7f; len; len--)
47 {
48 asrc = cell_map(source >> 2) << 2;
49 asrc |= source & 2;
50 r[a2>>1] = *(u16 *)(base + asrc);
51 source += 2;
52 // AutoIncrement
53 a2+=inc;
54 // good dest?
55 if(a2 >= 0x80) break;
56 }
57 a=(a&0xff00)|a2;
58 break;
59
60 case 5: // vsram[a&0x003f]=d;
61 r = Pico.vsram;
62 for(a2=a&0x7f; len; len--)
63 {
64 asrc = cell_map(source >> 2) << 2;
65 asrc |= source & 2;
66 r[a2>>1] = *(u16 *)(base + asrc);
67 source += 2;
68 // AutoIncrement
69 a2+=inc;
70 // good dest?
71 if(a2 >= 0x80) break;
72 }
73 a=(a&0xff00)|a2;
74 break;
75 }
76 // remember addr
77 Pico.video.addr=(u16)a;
78}
79