mirror of https://github.com/cc65/cc65.git
69 lines
3.5 KiB
C
69 lines
3.5 KiB
C
/*****************************************************************************/
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/* */
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/* _sid.h */
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/* */
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/* Internal include file, do not use directly */
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/* */
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/* */
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/* */
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/* (C) 1998-2000 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef __SID_H
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#define __SID_H
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/* Define a structure with the sid register offsets */
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struct __sid_voice {
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unsigned freq; /* Frequency */
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unsigned pw; /* Pulse width */
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unsigned char ctrl; /* Control register */
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unsigned char ad; /* Attack/decay */
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unsigned char sr; /* Sustain/release */
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};
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struct __sid {
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struct __sid_voice v1; /* Voice 1 */
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struct __sid_voice v2; /* Voice 2 */
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struct __sid_voice v3; /* Voice 3 */
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unsigned flt_freq; /* Filter frequency */
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unsigned char flt_ctrl; /* Filter control register */
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unsigned char amp; /* Amplitude */
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unsigned char ad1; /* A/D converter 1 */
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unsigned char ad2; /* A/D converter 2 */
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unsigned char noise; /* Noise generator */
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unsigned char read3; /* Value of voice 3 */
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};
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/* End of _sid.h */
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#endif
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