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annotate src/audio/mint/SDL_mintaudio_dma8.h @ 809:dba98fb391e7

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Date: Tue, 13 Jan 2004 19:25:37 +0300 From: Dmitry Yakimov Subject: [SDL] [PATCH] SDL bug patch Let me introduce 2 fixes to SDL. 1. Preventing great slowdown on fast machines while hardware flipping (it's obviously bug). 2. Setting up 85 Hz of monitor if supported. The reason is that Win98 by default sets lowest frequency 60 Hz. And we can't set up maximum frequency because some users can have wrong monitor drivers. This is important for shareware and commercial programs.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 11 Feb 2004 16:10:16 +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 audio definitions
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25
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26 Patrice Mandin
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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_select; /* CODEC only */
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61 unsigned char mode;
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62 };
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63 #define DMAAUDIO_IO ((*(volatile struct DMAAUDIO_IO_S *)DMAAUDIO_IO_BASE))
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64
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65 #endif /* _SDL_mintaudio_dma8_h */