1 // SPDX-License-Identifier: GPL-2.0
3  *	Mac bong noise generator. Note - we ought to put a boingy noise
6  *	----------------------------------------------------------------------
10  *	Juergen Mellinger (juergen.mellinger@t-online.de)
27  * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric)
31 	0, -39, -75, -103, -121, -127, -121, -103, -75, -39
44 static unsigned long mac_bell_phase; /* 0..2*Pi -> 0..0x800 (wavetable size) */
75 	 * this makes no sense here, because we have to set the default sample  in mac_init_asc()
78 	switch ( macintosh_config->ident )  in mac_init_asc()
106 			 * current location of the Apple Sound Chip--ASC--in other Macs.)  The  in mac_init_asc()
111 			 *   Macintosh models have 16-bit audio input and output capability  in mac_init_asc()
112 			 *   because of the AT&T DSP3210 hardware circuitry and the 16-bit Singer  in mac_init_asc()
115 			 *   16-bit I/O functionality.  The PowerBook 500 series computers  in mac_init_asc()
116 			 *   support 16-bit stereo output, but only mono input."  in mac_init_asc()
121 			 * --David Kilzer  in mac_init_asc()
150 		mac_asc_wave_tab[ i + 0x400 ] = 0xFF - i / 4;  in mac_init_asc()
164 void mac_mksound( unsigned int freq, unsigned int length )  in mac_mksound()  argument
166 	__u32 cfreq = ( freq << 5 ) / 468;  in mac_mksound()
181 		mac_special_bell( freq, length, 128 );  in mac_mksound()
185 	if ( freq < 20 || freq > 20000 || length == 0 )  in mac_mksound()
227 static void mac_quadra_start_bell( unsigned int freq, unsigned int length, unsigned int volume )  in mac_quadra_start_bell()  argument
240 	mac_bell_phasepersample = ( freq * sizeof( mac_asc_wave_tab ) ) / mac_asc_samplespersec;  in mac_quadra_start_bell()
289 	if ( mac_bell_duration-- > 0 )  in mac_quadra_ring_bell()
294 			mac_asc_regs[ 0 ] = mac_asc_wave_tab[ mac_bell_phase & ( sizeof( mac_asc_wave_tab ) - 1 ) ];  in mac_quadra_ring_bell()
306  * AV code - please fill in.
308 static void mac_av_start_bell( unsigned int freq, unsigned int length, unsigned int volume )  in mac_av_start_bell()  argument