Commit | Line | Data |
---|---|---|
ef79bbde P |
1 | /***************************************************************************\r |
2 | dma.c - description\r | |
3 | -------------------\r | |
4 | begin : Wed May 15 2002\r | |
5 | copyright : (C) 2002 by Pete Bernert\r | |
6 | email : BlackDove@addcom.de\r | |
7 | ***************************************************************************/\r | |
8 | /***************************************************************************\r | |
9 | * *\r | |
10 | * This program is free software; you can redistribute it and/or modify *\r | |
11 | * it under the terms of the GNU General Public License as published by *\r | |
12 | * the Free Software Foundation; either version 2 of the License, or *\r | |
13 | * (at your option) any later version. See also the license.txt file for *\r | |
14 | * additional informations. *\r | |
15 | * *\r | |
16 | ***************************************************************************/\r | |
17 | \r | |
18 | #include "stdafx.h"\r | |
19 | \r | |
20 | #define _IN_DMA\r | |
21 | \r | |
22 | #include "externals.h"\r | |
23 | \r | |
24 | ////////////////////////////////////////////////////////////////////////\r | |
25 | // READ DMA (one value)\r | |
26 | ////////////////////////////////////////////////////////////////////////\r | |
27 | \r | |
28 | unsigned short CALLBACK SPUreadDMA(void)\r | |
29 | {\r | |
30 | unsigned short s=spuMem[spuAddr>>1];\r | |
31 | spuAddr+=2;\r | |
32 | if(spuAddr>0x7ffff) spuAddr=0;\r | |
33 | \r | |
34 | iSpuAsyncWait=0;\r | |
35 | \r | |
36 | return s;\r | |
37 | }\r | |
38 | \r | |
39 | ////////////////////////////////////////////////////////////////////////\r | |
40 | // READ DMA (many values)\r | |
41 | ////////////////////////////////////////////////////////////////////////\r | |
42 | \r | |
43 | void CALLBACK SPUreadDMAMem(unsigned short * pusPSXMem,int iSize)\r | |
44 | {\r | |
45 | int i;\r | |
46 | \r | |
47 | for(i=0;i<iSize;i++)\r | |
48 | {\r | |
49 | *pusPSXMem++=spuMem[spuAddr>>1]; // spu addr got by writeregister\r | |
50 | spuAddr+=2; // inc spu addr\r | |
51 | if(spuAddr>0x7ffff) spuAddr=0; // wrap\r | |
52 | }\r | |
53 | \r | |
54 | iSpuAsyncWait=0;\r | |
55 | }\r | |
56 | \r | |
57 | ////////////////////////////////////////////////////////////////////////\r | |
58 | ////////////////////////////////////////////////////////////////////////\r | |
59 | ////////////////////////////////////////////////////////////////////////\r | |
60 | \r | |
61 | // to investigate: do sound data updates by writedma affect spu\r | |
62 | // irqs? Will an irq be triggered, if new data is written to\r | |
63 | // the memory irq address?\r | |
64 | \r | |
65 | ////////////////////////////////////////////////////////////////////////\r | |
66 | // WRITE DMA (one value)\r | |
67 | ////////////////////////////////////////////////////////////////////////\r | |
68 | \r | |
69 | void CALLBACK SPUwriteDMA(unsigned short val)\r | |
70 | {\r | |
71 | spuMem[spuAddr>>1] = val; // spu addr got by writeregister\r | |
72 | \r | |
73 | spuAddr+=2; // inc spu addr\r | |
74 | if(spuAddr>0x7ffff) spuAddr=0; // wrap\r | |
75 | \r | |
76 | iSpuAsyncWait=0;\r | |
77 | }\r | |
78 | \r | |
79 | ////////////////////////////////////////////////////////////////////////\r | |
80 | // WRITE DMA (many values)\r | |
81 | ////////////////////////////////////////////////////////////////////////\r | |
82 | \r | |
83 | void CALLBACK SPUwriteDMAMem(unsigned short * pusPSXMem,int iSize)\r | |
84 | {\r | |
85 | int i;\r | |
86 | \r | |
87 | for(i=0;i<iSize;i++)\r | |
88 | {\r | |
89 | spuMem[spuAddr>>1] = *pusPSXMem++; // spu addr got by writeregister\r | |
90 | spuAddr+=2; // inc spu addr\r | |
91 | if(spuAddr>0x7ffff) spuAddr=0; // wrap\r | |
92 | }\r | |
93 | \r | |
94 | iSpuAsyncWait=0;\r | |
95 | }\r | |
96 | \r | |
97 | ////////////////////////////////////////////////////////////////////////\r |