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annotate src/audio/mint/SDL_mintaudio_dma8.h @ 961:185acc07127a

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Date: Fri, 29 Oct 2004 11:47:09 +0200 From: Patrice Mandin Subject: Reworked audio drivers for Atari platform These are reworked audio drivers for the Atari platform. Previous drivers were missing some features: - Test external clock plugged to DSP port on Atari Falcon 030. - Ability to select internal or external clock. So now, I generate a list of frequencies available, with the master clock and predivisor to use. One big caveat to this: I do not have an external clock, so I hope it works.
author Patrice Mandin <patmandin@gmail.com>
date Fri, 29 Oct 2004 09:56:53 +0000
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /*
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24 DMA 8bits and Falcon Codec audio definitions
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25
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26 Patrice Mandin, Didier Méquignon
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27 */
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28
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29 #ifndef _SDL_mintaudio_dma8_h
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30 #define _SDL_mintaudio_dma8_h
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31
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32 #define DMAAUDIO_IO_BASE (0xffff8900)
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33 struct DMAAUDIO_IO_S {
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34 unsigned char int_ctrl;
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35 unsigned char control;
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36
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37 unsigned char dummy1;
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38 unsigned char start_high;
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39 unsigned char dummy2;
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40 unsigned char start_mid;
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41 unsigned char dummy3;
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42 unsigned char start_low;
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43
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44 unsigned char dummy4;
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45 unsigned char cur_high;
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46 unsigned char dummy5;
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47 unsigned char cur_mid;
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48 unsigned char dummy6;
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49 unsigned char cur_low;
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50
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51 unsigned char dummy7;
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52 unsigned char end_high;
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53 unsigned char dummy8;
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54 unsigned char end_mid;
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55 unsigned char dummy9;
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56 unsigned char end_low;
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57
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58 unsigned char dummy10[12];
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59
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60 unsigned char track_ctrl; /* CODEC only */
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61 unsigned char sound_ctrl;
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62 unsigned short sound_data;
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63 unsigned short sound_mask;
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64
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65 unsigned char dummy11[10];
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66
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67 unsigned short dev_ctrl;
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68 unsigned short dest_ctrl;
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69 unsigned short sync_div;
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70 unsigned char track_rec;
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71 unsigned char adderin_input;
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72 unsigned char channel_input;
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73 unsigned char channel_amplification;
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74 unsigned char channel_reduction;
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75
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76 unsigned char dummy12[6];
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77
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78 unsigned char data_direction;
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79 unsigned char dummy13;
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80 unsigned char dev_data;
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81 };
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82 #define DMAAUDIO_IO ((*(volatile struct DMAAUDIO_IO_S *)DMAAUDIO_IO_BASE))
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83
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84 #endif /* _SDL_mintaudio_dma8_h */