OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

Gravis Ultrasound GF1 sound card emulation (malc).

Browse Source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3921 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2008-01-14 22:09:11 +00:00
parent a8981ddad8
commit 423d65f4f9
8 changed files with 1345 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Makefile.target
View File

@ -421,6 +421,9 @@ endif
ifdef CONFIG_ADLIB
SOUND_HW += fmopl.o adlib.o
endif
ifdef CONFIG_GUS
SOUND_HW += gus.o gusemu_hal.o gusemu_mixer.o
endif
ifdef CONFIG_VNC_TLS
CPPFLAGS += $(CONFIG_VNC_TLS_CFLAGS)

9
configure vendored
View File

@ -86,6 +86,7 @@ gdbstub="yes"
slirp="yes"
adlib="no"
ac97="no"
gus="no"
oss="no"
dsound="no"
coreaudio="no"
@ -283,6 +284,8 @@ for opt do
;;
--enable-ac97) ac97="yes"
;;
--enable-gus) gus="yes"
;;
--disable-kqemu) kqemu="no"
;;
--enable-profiler) profiler="yes"
@ -410,6 +413,7 @@ echo " --enable-cocoa enable COCOA (Mac OS X only)"
echo " --enable-mingw32 enable Win32 cross compilation with mingw32"
echo " --enable-adlib enable Adlib emulation"
echo " --enable-ac97 enable AC97 emulation"
echo " --enable-gus enable Gravis Ultrasound emulation"
echo " --enable-coreaudio enable Coreaudio audio driver"
echo " --enable-alsa enable ALSA audio driver"
echo " --enable-esd enable EsoundD audio driver"
@ -724,6 +728,7 @@ fi
echo "mingw32 support $mingw32"
echo "Adlib support $adlib"
echo "AC97 support $ac97"
echo "GUS support $gus"
echo "CoreAudio support $coreaudio"
echo "ALSA support $alsa"
echo "EsounD support $esd"
@ -904,6 +909,10 @@ if test "$ac97" = "yes" ; then
echo "CONFIG_AC97=yes" >> $config_mak
echo "#define CONFIG_AC97 1" >> $config_h
fi
if test "$gus" = "yes" ; then
echo "CONFIG_GUS=yes" >> $config_mak
echo "#define CONFIG_GUS 1" >> $config_h
fi
if test "$oss" = "yes" ; then
echo "CONFIG_OSS=yes" >> $config_mak
echo "#define CONFIG_OSS 1" >> $config_h

300
hw/gus.c Normal file
View File

@ -0,0 +1,300 @@
/*
* QEMU Proxy for Gravis Ultrasound GF1 emulation by Tibor "TS" Schütz
*
* Copyright (c) 2002-2005 Vassili Karpov (malc)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "audiodev.h"
#include "audio/audio.h"
#include "isa.h"
#include "gusemu.h"
#include "gustate.h"
#define dolog(...) AUD_log ("audio", __VA_ARGS__)
#ifdef DEBUG
#define ldebug(...) dolog (__VA_ARGS__)
#else
#define ldebug(...)
#endif
#ifdef WORDS_BIGENDIAN
#define GUS_ENDIANNESS 1
#else
#define GUS_ENDIANNESS 0
#endif
#define IO_READ_PROTO(name) \
uint32_t name (void *opaque, uint32_t nport)
#define IO_WRITE_PROTO(name) \
void name (void *opaque, uint32_t nport, uint32_t val)
static struct {
int port;
int irq;
int dma;
int freq;
} conf = {0x240, 7, 3, 44100};
typedef struct GUSState {
GUSEmuState emu;
QEMUSoundCard card;
int freq;
int pos, left, shift, irqs;
uint16_t *mixbuf;
uint8_t himem[1024 * 1024 + 32 + 4096];
int samples;
SWVoiceOut *voice;
int64_t last_ticks;
qemu_irq *pic;
} GUSState;
IO_READ_PROTO (gus_readb)
{
GUSState *s = opaque;
return gus_read (&s->emu, nport, 1);
}
IO_READ_PROTO (gus_readw)
{
GUSState *s = opaque;
return gus_read (&s->emu, nport, 2);
}
IO_WRITE_PROTO (gus_writeb)
{
GUSState *s = opaque;
gus_write (&s->emu, nport, 1, val);
}
IO_WRITE_PROTO (gus_writew)
{
GUSState *s = opaque;
gus_write (&s->emu, nport, 2, val);
}
static int write_audio (GUSState *s, int samples)
{
int net = 0;
int pos = s->pos;
while (samples) {
int nbytes, wbytes, wsampl;
nbytes = samples << s->shift;
wbytes = AUD_write (
s->voice,
s->mixbuf + (pos << (s->shift - 1)),
nbytes
);
if (wbytes) {
wsampl = wbytes >> s->shift;
samples -= wsampl;
pos = (pos + wsampl) % s->samples;
net += wsampl;
}
else {
break;
}
}
return net;
}
static void GUS_callback (void *opaque, int free)
{
int samples, to_play, net = 0;
GUSState *s = opaque;
samples = free >> s->shift;
to_play = audio_MIN (samples, s->left);
while (to_play) {
int written = write_audio (s, to_play);
if (!written) {
goto reset;
}
s->left -= written;
to_play -= written;
samples -= written;
net += written;
}
samples = audio_MIN (samples, s->samples);
if (samples) {
gus_mixvoices (&s->emu, s->freq, samples, s->mixbuf);
while (samples) {
int written = write_audio (s, samples);
if (!written) {
break;
}
samples -= written;
net += written;
}
}
s->left = samples;
reset:
gus_irqgen (&s->emu, (double) (net * 1000000) / s->freq);
}
int GUS_irqrequest (GUSEmuState *emu, int hwirq, int n)
{
GUSState *s = emu->opaque;
/* qemu_irq_lower (s->pic[hwirq]); */
qemu_irq_raise (s->pic[hwirq]);
s->irqs += n;
ldebug ("irqrequest %d %d %d\n", hwirq, n, s->irqs);
return n;
}
void GUS_irqclear (GUSEmuState *emu, int hwirq)
{
GUSState *s = emu->opaque;
ldebug ("irqclear %d %d\n", hwirq, s->irqs);
qemu_irq_lower (s->pic[hwirq]);
s->irqs -= 1;
#ifdef IRQ_STORM
if (s->irqs > 0) {
qemu_irq_raise (s->pic[hwirq]);
}
#endif
}
void GUS_dmarequest (GUSEmuState *der)
{
/* GUSState *s = (GUSState *) der; */
ldebug ("dma request %d\n", der->gusdma);
DMA_hold_DREQ (der->gusdma);
}
int GUS_read_DMA (void *opaque, int nchan, int dma_pos, int dma_len)
{
GUSState *s = opaque;
int8_t tmpbuf[4096];
int pos = dma_pos, mode, left = dma_len - dma_pos;
ldebug ("read DMA %#x %d\n", dma_pos, dma_len);
mode = DMA_get_channel_mode (s->emu.gusdma);
while (left) {
int to_copy = audio_MIN ((size_t) left, sizeof (tmpbuf));
int copied;
ldebug ("left=%d to_copy=%d pos=%d\n", left, to_copy, pos);
copied = DMA_read_memory (nchan, tmpbuf, pos, to_copy);
gus_dma_transferdata (&s->emu, tmpbuf, copied, left == copied);
left -= copied;
pos += copied;
}
if (0 == ((mode >> 4) & 1)) {
DMA_release_DREQ (s->emu.gusdma);
}
return dma_len;
}
int GUS_init (AudioState *audio, qemu_irq *pic)
{
GUSState *s;
audsettings_t as;
if (!audio) {
dolog ("No audio state\n");
return -1;
}
s = qemu_mallocz (sizeof (*s));
if (!s) {
dolog ("Could not allocate memory for GUS (%zu bytes)\n",
sizeof (*s));
return -1;
}
AUD_register_card (audio, "gus", &s->card);
as.freq = conf.freq;
as.nchannels = 2;
as.fmt = AUD_FMT_S16;
as.endianness = GUS_ENDIANNESS;
s->voice = AUD_open_out (
&s->card,
NULL,
"gus",
s,
GUS_callback,
&as
);
if (!s->voice) {
AUD_remove_card (&s->card);
qemu_free (s);
return -1;
}
s->shift = 2;
s->samples = AUD_get_buffer_size_out (s->voice) >> s->shift;
s->mixbuf = qemu_mallocz (s->samples << s->shift);
if (!s->mixbuf) {
AUD_close_out (&s->card, s->voice);
AUD_remove_card (&s->card);
qemu_free (s);
return -1;
}
register_ioport_write (conf.port, 1, 1, gus_writeb, s);
register_ioport_write (conf.port, 1, 2, gus_writew, s);
register_ioport_read ((conf.port + 0x100) & 0xf00, 1, 1, gus_readb, s);
register_ioport_read ((conf.port + 0x100) & 0xf00, 1, 2, gus_readw, s);
register_ioport_write (conf.port + 6, 10, 1, gus_writeb, s);
register_ioport_write (conf.port + 6, 10, 2, gus_writew, s);
register_ioport_read (conf.port + 6, 10, 1, gus_readb, s);
register_ioport_read (conf.port + 6, 10, 2, gus_readw, s);
register_ioport_write (conf.port + 0x100, 8, 1, gus_writeb, s);
register_ioport_write (conf.port + 0x100, 8, 2, gus_writew, s);
register_ioport_read (conf.port + 0x100, 8, 1, gus_readb, s);
register_ioport_read (conf.port + 0x100, 8, 2, gus_readw, s);
DMA_register_channel (conf.dma, GUS_read_DMA, s);
s->emu.gusirq = conf.irq;
s->emu.gusdma = conf.dma;
s->emu.himemaddr = s->himem;
s->emu.gusdatapos = s->emu.himemaddr + 1024 * 1024 + 32;
s->emu.opaque = s;
s->freq = conf.freq;
s->pic = pic;
AUD_set_active_out (s->voice, 1);
return 0;
}

103
hw/gusemu.h Normal file
View File

@ -0,0 +1,103 @@
/*
* GUSEMU32 - API
*
* Copyright (C) 2000-2007 Tibor "TS" Schütz
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUSEMU_H
#define GUSEMU_H
/* data types (need to be adjusted if neither a VC6 nor a C99 compatible compiler is used) */
#if defined _WIN32 && defined _MSC_VER /* doesnt support other win32 compilers yet, do it yourself... */
typedef unsigned char GUSbyte;
typedef unsigned short GUSword;
typedef unsigned int GUSdword;
typedef signed char GUSchar;
#else
#include <stdint.h>
typedef int8_t GUSchar;
typedef uint8_t GUSbyte;
typedef uint16_t GUSword;
typedef uint32_t GUSdword;
#endif
typedef struct _GUSEmuState
{
GUSbyte *himemaddr; /* 1024*1024 bytes used for storing uploaded samples (+32 additional bytes for read padding) */
GUSbyte *gusdatapos; /* (gusdataend-gusdata) bytes used for storing emulated GF1/mixer register states (32*32+4 bytes in initial GUSemu32 version) */
int gusirq;
int gusdma;
unsigned int timer1fraction;
unsigned int timer2fraction;
void *opaque;
} GUSEmuState;
/* ** Callback functions needed: */
/* NMI is defined as hwirq=-1 (not supported (yet?)) */
/* GUS_irqrequest returns the number of IRQs actually scheduled into the virtual machine */
/* Level triggered IRQ simulations normally return 1 */
/* Event triggered IRQ simulation can safely ignore GUS_irqclear calls */
int GUS_irqrequest(GUSEmuState *state, int hwirq, int num);/* needed in both mixer and bus emulation functions. */
void GUS_irqclear( GUSEmuState *state, int hwirq); /* used by gus_write() only - can be left empty for mixer functions */
void GUS_dmarequest(GUSEmuState *state); /* used by gus_write() only - can be left empty for mixer functions */
/* ** ISA bus interface functions: */
/* Port I/O handlers */
/* support the following ports: */
/* 2x0,2x6,2x8...2xF,3x0...3x7; */
/* optional: 388,389 (at least writes should be forwarded or some GUS detection algorithms will fail) */
/* data is passed in host byte order */
unsigned int gus_read( GUSEmuState *state, int port, int size);
void gus_write(GUSEmuState *state, int port, int size, unsigned int data);
/* size is given in bytes (1 for byte, 2 for word) */
/* DMA data transfer function */
/* data pointed to is passed in native x86 order */
void gus_dma_transferdata(GUSEmuState *state, char *dma_addr, unsigned int count, int TC);
/* Called back by GUS_start_DMA as soon as the emulated DMA controller is ready for a transfer to or from GUS */
/* (might be immediately if the DMA controller was programmed first) */
/* dma_addr is an already translated address directly pointing to the beginning of the memory block */
/* do not forget to update DMA states after the call, including the DREQ and TC flags */
/* it is possible to break down a single transfer into multiple ones, but take care that: */
/* -dma_count is actually count-1 */
/* -before and during a transfer, DREQ is set and TC cleared */
/* -when calling gus_dma_transferdata(), TC is only set true for call transfering the last byte */
/* -after the last transfer, DREQ is cleared and TC is set */
/* ** GF1 mixer emulation functions: */
/* Usually, gus_irqgen should be called directly after gus_mixvoices if you can meet the recommended ranges. */
/* If the interrupts are executed immediately (i.e., are synchronous), it may be useful to break this */
/* down into a sequence of gus_mixvoice();gus_irqgen(); calls while mixing an audio block. */
/* If the interrupts are asynchronous, it may be needed to use a separate thread mixing into a temporary */
/* audio buffer in order to avoid quality loss caused by large numsamples and elapsed_time values. */
void gus_mixvoices(GUSEmuState *state, unsigned int playback_freq, unsigned int numsamples, short *bufferpos);
/* recommended range: 10 < numsamples < 100 */
/* lower values may result in increased rounding error, higher values often cause audible timing delays */
void gus_irqgen(GUSEmuState *state, unsigned int elapsed_time);
/* recommended range: 80us < elapsed_time < max(1000us, numsamples/playback_freq) */
/* lower values won´t provide any benefit at all, higher values can cause audible timing delays */
/* note: masked timers are also calculated by this function, thus it might be needed even without any IRQs in use! */
#endif /* gusemu.h */

554
hw/gusemu_hal.c Normal file
View File

@ -0,0 +1,554 @@
/*
* GUSEMU32 - bus interface part
*
* Copyright (C) 2000-2007 Tibor "TS" Schütz
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
* TODO: check mixer: see 7.20 of sdk for panning pos (applies to all gus models?)?
*/
#include "gustate.h"
#include "gusemu.h"
#define GUSregb(position) (* (gusptr+(position)))
#define GUSregw(position) (*(GUSword *) (gusptr+(position)))
#define GUSregd(position) (*(GUSdword *)(gusptr+(position)))
/* size given in bytes */
unsigned int gus_read(GUSEmuState * state, int port, int size)
{
int value_read = 0;
GUSbyte *gusptr;
gusptr = state->gusdatapos;
GUSregd(portaccesses)++;
switch (port & 0xff0f)
{
/* MixerCtrlReg (read not supported on GUS classic) */
/* case 0x200: return GUSregb(MixerCtrlReg2x0); */
case 0x206: /* IRQstatReg / SB2x6IRQ */
/* adlib/sb bits set in port handlers */
/* timer/voice bits set in gus_irqgen() */
/* dma bit set in gus_dma_transferdata */
/* midi not implemented yet */
return GUSregb(IRQStatReg2x6);
/* case 0x308: */ /* AdLib388 */
case 0x208:
if (GUSregb(GUS45TimerCtrl) & 1)
return GUSregb(TimerStatus2x8);
return GUSregb(AdLibStatus2x8); /* AdLibStatus */
case 0x309: /* AdLib389 */
case 0x209:
return GUSregb(AdLibData2x9); /* AdLibData */
case 0x20A:
return GUSregb(AdLibCommand2xA); /* AdLib2x8_2xA */
#if 0
case 0x20B: /* GUS hidden registers (read not supported on GUS classic) */
switch (GUSregb(RegCtrl_2xF) & 0x07)
{
case 0: /* IRQ/DMA select */
if (GUSregb(MixerCtrlReg2x0) & 0x40)
return GUSregb(IRQ_2xB); /* control register select bit */
else
return GUSregb(DMA_2xB);
/* case 1-5: */ /* general purpose emulation regs */
/* return ... */ /* + status reset reg (write only) */
case 6:
return GUSregb(Jumper_2xB); /* Joystick/MIDI enable (JumperReg) */
default:;
}
break;
#endif
case 0x20C: /* SB2xCd */
value_read = GUSregb(SB2xCd);
if (GUSregb(StatRead_2xF) & 0x20)
GUSregb(SB2xCd) ^= 0x80; /* toggle MSB on read */
return value_read;
/* case 0x20D: */ /* SB2xD is write only -> 2xE writes to it*/
case 0x20E:
if (GUSregb(RegCtrl_2xF) & 0x80) /* 2xE read IRQ enabled? */
{
GUSregb(StatRead_2xF) |= 0x80;
GUS_irqrequest(state, state->gusirq, 1);
}
return GUSregb(SB2xE); /* SB2xE */
case 0x20F: /* StatRead_2xF */
/*set/clear fixed bits */
/*value_read = (GUSregb(StatRead_2xF) & 0xf9)|1; */ /*(LSB not set on GUS classic!)*/
value_read = (GUSregb(StatRead_2xF) & 0xf9);
if (GUSregb(MixerCtrlReg2x0) & 0x08)
value_read |= 2; /* DMA/IRQ enabled flag */
return value_read;
/* case 0x300: */ /* MIDI (not implemented) */
/* case 0x301: */ /* MIDI (not implemented) */
case 0x302:
return GUSregb(VoiceSelReg3x2); /* VoiceSelReg */
case 0x303:
return GUSregb(FunkSelReg3x3); /* FunkSelReg */
case 0x304: /* DataRegLoByte3x4 + DataRegWord3x4 */
case 0x305: /* DataRegHiByte3x5 */
switch (GUSregb(FunkSelReg3x3))
{
/* common functions */
case 0x41: /* DramDMAContrReg */
value_read = GUSregb(GUS41DMACtrl); /* &0xfb */
GUSregb(GUS41DMACtrl) &= 0xbb;
if (state->gusdma >= 4)
value_read |= 0x04;
if (GUSregb(IRQStatReg2x6) & 0x80)
{
value_read |= 0x40;
GUSregb(IRQStatReg2x6) &= 0x7f;
if (!GUSregb(IRQStatReg2x6))
GUS_irqclear(state, state->gusirq);
}
return (GUSbyte) value_read;
/* DramDMAmemPosReg */
/* case 0x42: value_read=GUSregw(GUS42DMAStart); break;*/
/* 43h+44h write only */
case 0x45:
return GUSregb(GUS45TimerCtrl); /* TimerCtrlReg */
/* 46h+47h write only */
/* 48h: samp freq - write only */
case 0x49:
return GUSregb(GUS49SampCtrl) & 0xbf; /* SampCtrlReg */
/* case 4bh: */ /* joystick trim not supported */
/* case 0x4c: return GUSregb(GUS4cReset); */ /* GUSreset: write only*/
/* voice specific functions */
case 0x80:
case 0x81:
case 0x82:
case 0x83:
case 0x84:
case 0x85:
case 0x86:
case 0x87:
case 0x88:
case 0x89:
case 0x8a:
case 0x8b:
case 0x8c:
case 0x8d:
{
int offset = 2 * (GUSregb(FunkSelReg3x3) & 0x0f);
offset += ((int) GUSregb(VoiceSelReg3x2) & 0x1f) << 5; /* = Voice*32 + Funktion*2 */
value_read = GUSregw(offset);
}
break;
/* voice unspecific functions */
case 0x8e: /* NumVoice */
return GUSregb(NumVoices);
case 0x8f: /* irqstatreg */
/* (pseudo IRQ-FIFO is processed during a gus_write(0x3X3,0x8f)) */
return GUSregb(SynVoiceIRQ8f);
default:
return 0xffff;
}
if (size == 1)
{
if ((port & 0xff0f) == 0x305)
value_read = value_read >> 8;
value_read &= 0xff;
}
return (GUSword) value_read;
/* case 0x306: */ /* Mixer/Version info */
/* return 0xff; */ /* Pre 3.6 boards, ICS mixer NOT present */
case 0x307: /* DRAMaccess */
{
GUSbyte *adr;
adr = state->himemaddr + (GUSregd(GUSDRAMPOS24bit) & 0xfffff);
return *adr;
}
default:;
}
return 0xffff;
}
void gus_write(GUSEmuState * state, int port, int size, unsigned int data)
{
GUSbyte *gusptr;
gusptr = state->gusdatapos;
GUSregd(portaccesses)++;
switch (port & 0xff0f)
{
case 0x200: /* MixerCtrlReg */
GUSregb(MixerCtrlReg2x0) = (GUSbyte) data;
break;
case 0x206: /* IRQstatReg / SB2x6IRQ */
if (GUSregb(GUS45TimerCtrl) & 0x20) /* SB IRQ enabled? -> set 2x6IRQ bit */
{
GUSregb(TimerStatus2x8) |= 0x08;
GUSregb(IRQStatReg2x6) = 0x10;
GUS_irqrequest(state, state->gusirq, 1);
}
break;
case 0x308: /* AdLib 388h */
case 0x208: /* AdLibCommandReg */
GUSregb(AdLibCommand2xA) = (GUSbyte) data;
break;
case 0x309: /* AdLib 389h */
case 0x209: /* AdLibDataReg */
if ((GUSregb(AdLibCommand2xA) == 0x04) && (!(GUSregb(GUS45TimerCtrl) & 1))) /* GUS auto timer mode enabled? */
{
if (data & 0x80)
GUSregb(TimerStatus2x8) &= 0x1f; /* AdLib IRQ reset? -> clear maskable adl. timer int regs */
else
GUSregb(TimerDataReg2x9) = (GUSbyte) data;
}
else
{
GUSregb(AdLibData2x9) = (GUSbyte) data;
if (GUSregb(GUS45TimerCtrl) & 0x02)
{
GUSregb(TimerStatus2x8) |= 0x01;
GUSregb(IRQStatReg2x6) = 0x10;
GUS_irqrequest(state, state->gusirq, 1);
}
}
break;
case 0x20A:
GUSregb(AdLibStatus2x8) = (GUSbyte) data;
break; /* AdLibStatus2x8 */
case 0x20B: /* GUS hidden registers */
switch (GUSregb(RegCtrl_2xF) & 0x7)
{
case 0:
if (GUSregb(MixerCtrlReg2x0) & 0x40)
GUSregb(IRQ_2xB) = (GUSbyte) data; /* control register select bit */
else
GUSregb(DMA_2xB) = (GUSbyte) data;
break;
/* case 1-4: general purpose emulation regs */
case 5: /* clear stat reg 2xF */
GUSregb(StatRead_2xF) = 0; /* ToDo: is this identical with GUS classic? */
if (!GUSregb(IRQStatReg2x6))
GUS_irqclear(state, state->gusirq);
break;
case 6: /* Jumper reg (Joystick/MIDI enable) */
GUSregb(Jumper_2xB) = (GUSbyte) data;
break;
default:;
}
break;
case 0x20C: /* SB2xCd */
if (GUSregb(GUS45TimerCtrl) & 0x20)
{
GUSregb(TimerStatus2x8) |= 0x10; /* SB IRQ enabled? -> set 2xCIRQ bit */
GUSregb(IRQStatReg2x6) = 0x10;
GUS_irqrequest(state, state->gusirq, 1);
}
case 0x20D: /* SB2xCd no IRQ */
GUSregb(SB2xCd) = (GUSbyte) data;
break;
case 0x20E: /* SB2xE */
GUSregb(SB2xE) = (GUSbyte) data;
break;
case 0x20F:
GUSregb(RegCtrl_2xF) = (GUSbyte) data;
break; /* CtrlReg2xF */
case 0x302: /* VoiceSelReg */
GUSregb(VoiceSelReg3x2) = (GUSbyte) data;
break;
case 0x303: /* FunkSelReg */
GUSregb(FunkSelReg3x3) = (GUSbyte) data;
if ((GUSbyte) data == 0x8f) /* set irqstatreg, get voicereg and clear IRQ */
{
int voice;
if (GUSregd(voicewavetableirq)) /* WavetableIRQ */
{
for (voice = 0; voice < 31; voice++)
{
if (GUSregd(voicewavetableirq) & (1 << voice))
{
GUSregd(voicewavetableirq) ^= (1 << voice); /* clear IRQ bit */
GUSregb(voice << 5) &= 0x7f; /* clear voice reg irq bit */
if (!GUSregd(voicewavetableirq))
GUSregb(IRQStatReg2x6) &= 0xdf;
if (!GUSregb(IRQStatReg2x6))
GUS_irqclear(state, state->gusirq);
GUSregb(SynVoiceIRQ8f) = voice | 0x60; /* (bit==0 => IRQ wartend) */
return;
}
}
}
else if (GUSregd(voicevolrampirq)) /* VolRamp IRQ */
{
for (voice = 0; voice < 31; voice++)
{
if (GUSregd(voicevolrampirq) & (1 << voice))
{
GUSregd(voicevolrampirq) ^= (1 << voice); /* clear IRQ bit */
GUSregb((voice << 5) + VSRVolRampControl) &= 0x7f; /* clear voice volume reg irq bit */
if (!GUSregd(voicevolrampirq))
GUSregb(IRQStatReg2x6) &= 0xbf;
if (!GUSregb(IRQStatReg2x6))
GUS_irqclear(state, state->gusirq);
GUSregb(SynVoiceIRQ8f) = voice | 0x80; /* (bit==0 => IRQ wartend) */
return;
}
}
}
GUSregb(SynVoiceIRQ8f) = 0xe8; /* kein IRQ wartet */
}
break;
case 0x304:
case 0x305:
{
GUSword writedata = (GUSword) data;
GUSword readmask = 0x0000;
if (size == 1)
{
readmask = 0xff00;
writedata &= 0xff;
if ((port & 0xff0f) == 0x305)
{
writedata = (GUSword) (writedata << 8);
readmask = 0x00ff;
}
}
switch (GUSregb(FunkSelReg3x3))
{
/* voice specific functions */
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x08:
case 0x09:
case 0x0a:
case 0x0b:
case 0x0c:
case 0x0d:
{
int offset;
if (!(GUSregb(GUS4cReset) & 0x01))
break; /* reset flag active? */
offset = 2 * (GUSregb(FunkSelReg3x3) & 0x0f);
offset += (GUSregb(VoiceSelReg3x2) & 0x1f) << 5; /* = Voice*32 + Funktion*2 */
GUSregw(offset) = (GUSword) ((GUSregw(offset) & readmask) | writedata);
}
break;
/* voice unspecific functions */
case 0x0e: /* NumVoices */
GUSregb(NumVoices) = (GUSbyte) data;
break;
/* case 0x0f: */ /* read only */
/* common functions */
case 0x41: /* DramDMAContrReg */
GUSregb(GUS41DMACtrl) = (GUSbyte) data;
if (data & 0x01)
GUS_dmarequest(state);
break;
case 0x42: /* DramDMAmemPosReg */
GUSregw(GUS42DMAStart) = (GUSregw(GUS42DMAStart) & readmask) | writedata;
GUSregb(GUS50DMAHigh) &= 0xf; /* compatibility stuff... */
break;
case 0x43: /* DRAMaddrLo */
GUSregd(GUSDRAMPOS24bit) =
(GUSregd(GUSDRAMPOS24bit) & (readmask | 0xff0000)) | writedata;
break;
case 0x44: /* DRAMaddrHi */
GUSregd(GUSDRAMPOS24bit) =
(GUSregd(GUSDRAMPOS24bit) & 0xffff) | ((data & 0x0f) << 16);
break;
case 0x45: /* TCtrlReg */
GUSregb(GUS45TimerCtrl) = (GUSbyte) data;
if (!(data & 0x20))
GUSregb(TimerStatus2x8) &= 0xe7; /* sb IRQ dis? -> clear 2x8/2xC sb IRQ flags */
if (!(data & 0x02))
GUSregb(TimerStatus2x8) &= 0xfe; /* adlib data IRQ dis? -> clear 2x8 adlib IRQ flag */
if (!(GUSregb(TimerStatus2x8) & 0x19))
GUSregb(IRQStatReg2x6) &= 0xef; /* 0xe6; $$clear IRQ if both IRQ bits are inactive or cleared */
/* catch up delayed timer IRQs: */
if ((GUSregw(TimerIRQs) > 1) && (GUSregb(TimerDataReg2x9) & 3))
{
if (GUSregb(TimerDataReg2x9) & 1) /* start timer 1 (80us decrement rate) */
{
if (!(GUSregb(TimerDataReg2x9) & 0x40))
GUSregb(TimerStatus2x8) |= 0xc0; /* maskable bits */
if (data & 4) /* timer1 irq enable */
{
GUSregb(TimerStatus2x8) |= 4; /* nonmaskable bit */
GUSregb(IRQStatReg2x6) |= 4; /* timer 1 irq pending */
}
}
if (GUSregb(TimerDataReg2x9) & 2) /* start timer 2 (320us decrement rate) */
{
if (!(GUSregb(TimerDataReg2x9) & 0x20))
GUSregb(TimerStatus2x8) |= 0xa0; /* maskable bits */
if (data & 8) /* timer2 irq enable */
{
GUSregb(TimerStatus2x8) |= 2; /* nonmaskable bit */
GUSregb(IRQStatReg2x6) |= 8; /* timer 2 irq pending */
}
}
GUSregw(TimerIRQs)--;
if (GUSregw(BusyTimerIRQs) > 1)
GUSregw(BusyTimerIRQs)--;
else
GUSregw(BusyTimerIRQs) =
GUS_irqrequest(state, state->gusirq, GUSregw(TimerIRQs));
}
else
GUSregw(TimerIRQs) = 0;
if (!(data & 0x04))
{
GUSregb(TimerStatus2x8) &= 0xfb; /* clear non-maskable timer1 bit */
GUSregb(IRQStatReg2x6) &= 0xfb;
}
if (!(data & 0x08))
{
GUSregb(TimerStatus2x8) &= 0xfd; /* clear non-maskable timer2 bit */
GUSregb(IRQStatReg2x6) &= 0xf7;
}
if (!GUSregb(IRQStatReg2x6))
GUS_irqclear(state, state->gusirq);
break;
case 0x46: /* Counter1 */
GUSregb(GUS46Counter1) = (GUSbyte) data;
break;
case 0x47: /* Counter2 */
GUSregb(GUS47Counter2) = (GUSbyte) data;
break;
/* case 0x48: */ /* sampling freq reg not emulated (same as interwave) */
case 0x49: /* SampCtrlReg */
GUSregb(GUS49SampCtrl) = (GUSbyte) data;
break;
/* case 0x4b: */ /* joystick trim not emulated */
case 0x4c: /* GUSreset */
GUSregb(GUS4cReset) = (GUSbyte) data;
if (!(GUSregb(GUS4cReset) & 1)) /* reset... */
{
GUSregd(voicewavetableirq) = 0;
GUSregd(voicevolrampirq) = 0;
GUSregw(TimerIRQs) = 0;
GUSregw(BusyTimerIRQs) = 0;
GUSregb(NumVoices) = 0xcd;
GUSregb(IRQStatReg2x6) = 0;
GUSregb(TimerStatus2x8) = 0;
GUSregb(AdLibData2x9) = 0;
GUSregb(TimerDataReg2x9) = 0;
GUSregb(GUS41DMACtrl) = 0;
GUSregb(GUS45TimerCtrl) = 0;
GUSregb(GUS49SampCtrl) = 0;
GUSregb(GUS4cReset) &= 0xf9; /* clear IRQ and DAC enable bits */
GUS_irqclear(state, state->gusirq);
}
/* IRQ enable bit checked elsewhere */
/* EnableDAC bit may be used by external callers */
break;
}
}
break;
case 0x307: /* DRAMaccess */
{
GUSbyte *adr;
adr = state->himemaddr + (GUSregd(GUSDRAMPOS24bit) & 0xfffff);
*adr = (GUSbyte) data;
}
break;
}
}
/* Attention when breaking up a single DMA transfer to multiple ones:
* it may lead to multiple terminal count interrupts and broken transfers:
*
* 1. Whenever you transfer a piece of data, the gusemu callback is invoked
* 2. The callback may generate a TC irq (if the register was set up to do so)
* 3. The irq may result in the program using the GUS to reprogram the GUS
*
* Some programs also decide to upload by just checking if TC occurs
* (via interrupt or a cleared GUS dma flag)
* and then start the next transfer, without checking DMA state
*
* Thus: Always make sure to set the TC flag correctly!
*
* Note that the genuine GUS had a granularity of 16 bytes/words for low/high DMA
* while later cards had atomic granularity provided by an additional GUS50DMAHigh register
* GUSemu also uses this register to support byte-granular transfers for better compatibility
* with emulators other than GUSemu32
*/
void gus_dma_transferdata(GUSEmuState * state, char *dma_addr, unsigned int count, int TC)
{
/* this function gets called by the callback function as soon as a DMA transfer is about to start
* dma_addr is a translated address within accessible memory, not the physical one,
* count is (real dma count register)+1
* note that the amount of bytes transfered is fully determined by values in the DMA registers
* do not forget to update DMA states after transferring the entire block:
* DREQ cleared & TC asserted after the _whole_ transfer */
char *srcaddr;
char *destaddr;
char msbmask = 0;
GUSbyte *gusptr;
gusptr = state->gusdatapos;
srcaddr = dma_addr; /* system memory address */
{
int offset = (GUSregw(GUS42DMAStart) << 4) + (GUSregb(GUS50DMAHigh) & 0xf);
if (state->gusdma >= 4)
offset = (offset & 0xc0000) + (2 * (offset & 0x1fff0)); /* 16 bit address translation */
destaddr = (char *) state->himemaddr + offset; /* wavetable RAM adress */
}
GUSregw(GUS42DMAStart) += (GUSword) (count >> 4); /* ToDo: add 16bit GUS page limit? */
GUSregb(GUS50DMAHigh) = (GUSbyte) ((count + GUSregb(GUS50DMAHigh)) & 0xf); /* ToDo: add 16bit GUS page limit? */
if (GUSregb(GUS41DMACtrl) & 0x02) /* direction, 0 := sysram->gusram */
{
char *tmpaddr = destaddr;
destaddr = srcaddr;
srcaddr = tmpaddr;
}
if ((GUSregb(GUS41DMACtrl) & 0x80) && (!(GUSregb(GUS41DMACtrl) & 0x02)))
msbmask = (const char) 0x80; /* invert MSB */
for (; count > 0; count--)
{
if (GUSregb(GUS41DMACtrl) & 0x40)
*(destaddr++) = *(srcaddr++); /* 16 bit lobyte */
else
*(destaddr++) = (msbmask ^ (*(srcaddr++))); /* 8 bit */
if (state->gusdma >= 4)
*(destaddr++) = (msbmask ^ (*(srcaddr++))); /* 16 bit hibyte */
}
if (TC)
{
(GUSregb(GUS41DMACtrl)) &= 0xfe; /* clear DMA request bit */
if (GUSregb(GUS41DMACtrl) & 0x20) /* DMA terminal count IRQ */
{
GUSregb(IRQStatReg2x6) |= 0x80;
GUS_irqrequest(state, state->gusirq, 1);
}
}
}

240
hw/gusemu_mixer.c Normal file
View File

@ -0,0 +1,240 @@
/*
* GUSEMU32 - mixing engine (similar to Interwave GF1 compatibility)
*
* Copyright (C) 2000-2007 Tibor "TS" Schütz
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "gusemu.h"
#include "gustate.h"
#define GUSregb(position) (* (gusptr+(position)))
#define GUSregw(position) (*(GUSword *) (gusptr+(position)))
#define GUSregd(position) (*(GUSdword *)(gusptr+(position)))
#define GUSvoice(position) (*(GUSword *)(voiceptr+(position)))
/* samples are always 16bit stereo (4 bytes each, first right then left interleaved) */
void gus_mixvoices(GUSEmuState * state, unsigned int playback_freq, unsigned int numsamples,
short *bufferpos)
{
/* note that byte registers are stored in the upper half of each voice register! */
GUSbyte *gusptr;
int Voice;
GUSword *voiceptr;
unsigned int count;
for (count = 0; count < numsamples * 2; count++)
*(bufferpos + count) = 0; /* clear */
gusptr = state->gusdatapos;
voiceptr = (GUSword *) gusptr;
if (!(GUSregb(GUS4cReset) & 0x01)) /* reset flag active? */
return;
for (Voice = 0; Voice <= (GUSregb(NumVoices) & 31); Voice++)
{
if (GUSvoice(wVSRControl) & 0x200)
GUSvoice(wVSRControl) |= 0x100; /* voice stop request */
if (GUSvoice(wVSRVolRampControl) & 0x200)
GUSvoice(wVSRVolRampControl) |= 0x100; /* Volume ramp stop request */
if (!(GUSvoice(wVSRControl) & GUSvoice(wVSRVolRampControl) & 0x100)) /* neither voice nor volume calculation active - save some time here ;) */
{
unsigned int sample;
unsigned int LoopStart = (GUSvoice(wVSRLoopStartHi) << 16) | GUSvoice(wVSRLoopStartLo); /* 23.9 format */
unsigned int LoopEnd = (GUSvoice(wVSRLoopEndHi) << 16) | GUSvoice(wVSRLoopEndLo); /* 23.9 format */
unsigned int CurrPos = (GUSvoice(wVSRCurrPosHi) << 16) | GUSvoice(wVSRCurrPosLo); /* 23.9 format */
int VoiceIncrement = ((((unsigned long) GUSvoice(wVSRFreq) * 44100) / playback_freq) * (14 >> 1)) /
((GUSregb(NumVoices) & 31) + 1); /* 6.10 increment/frame to 23.9 increment/sample */
int PanningPos = (GUSvoice(wVSRPanning) >> 8) & 0xf;
unsigned int Volume32 = 32 * GUSvoice(wVSRCurrVol); /* 32 times larger than original gus for maintaining precision while ramping */
unsigned int StartVol32 = (GUSvoice(wVSRVolRampStartVol) & 0xff00) * 32;
unsigned int EndVol32 = (GUSvoice(wVSRVolRampEndVol) & 0xff00) * 32;
int VolumeIncrement32 = (32 * 16 * (GUSvoice(wVSRVolRampRate) & 0x3f00) >> 8) >> ((((GUSvoice(wVSRVolRampRate) & 0xc000) >> 8) >> 6) * 3); /* including 1/8/64/512 volume speed divisor */
VolumeIncrement32 = (((VolumeIncrement32 * 44100 / 2) / playback_freq) * 14) / ((GUSregb(NumVoices) & 31) + 1); /* adjust ramping speed to playback speed */
if (GUSvoice(wVSRControl) & 0x4000)
VoiceIncrement = -VoiceIncrement; /* reverse playback */
if (GUSvoice(wVSRVolRampControl) & 0x4000)
VolumeIncrement32 = -VolumeIncrement32; /* reverse ramping */
for (sample = 0; sample < numsamples; sample++)
{
int sample1, sample2, Volume;
if (GUSvoice(wVSRControl) & 0x400) /* 16bit */
{
int offset = ((CurrPos >> 9) & 0xc0000) + (((CurrPos >> 9) & 0x1ffff) << 1);
GUSchar *adr;
adr = (GUSchar *) state->himemaddr + offset;
sample1 = (*adr & 0xff) + (*(adr + 1) * 256);
sample2 = (*(adr + 2) & 0xff) + (*(adr + 2 + 1) * 256);
}
else /* 8bit */
{
int offset = (CurrPos >> 9) & 0xfffff;
GUSchar *adr;
adr = (GUSchar *) state->himemaddr + offset;
sample1 = (*adr) * 256;
sample2 = (*(adr + 1)) * 256;
}
Volume = ((((Volume32 >> (4 + 5)) & 0xff) + 256) << (Volume32 >> ((4 + 8) + 5))) / 512; /* semi-logarithmic volume, +5 due to additional precision */
sample1 = (((sample1 * Volume) >> 16) * (512 - (CurrPos % 512))) / 512;
sample2 = (((sample2 * Volume) >> 16) * (CurrPos % 512)) / 512;
sample1 += sample2;
if (!(GUSvoice(wVSRVolRampControl) & 0x100))
{
Volume32 += VolumeIncrement32;
if ((GUSvoice(wVSRVolRampControl) & 0x4000) ? (Volume32 <= StartVol32) : (Volume32 >= EndVol32)) /* ramp up boundary cross */
{
if (GUSvoice(wVSRVolRampControl) & 0x2000)
GUSvoice(wVSRVolRampControl) |= 0x8000; /* volramp IRQ enabled? -> IRQ wait flag */
if (GUSvoice(wVSRVolRampControl) & 0x800) /* loop enabled */
{
if (GUSvoice(wVSRVolRampControl) & 0x1000) /* bidir. loop */
{
GUSvoice(wVSRVolRampControl) ^= 0x4000; /* toggle dir */
VolumeIncrement32 = -VolumeIncrement32;
}
else
Volume32 = (GUSvoice(wVSRVolRampControl) & 0x4000) ? EndVol32 : StartVol32; /* unidir. loop ramp */
}
else
{
GUSvoice(wVSRVolRampControl) |= 0x100;
Volume32 =
(GUSvoice(wVSRVolRampControl) & 0x4000) ? StartVol32 : EndVol32;
}
}
}
if ((GUSvoice(wVSRVolRampControl) & 0xa000) == 0xa000) /* volramp IRQ set and enabled? */
{
GUSregd(voicevolrampirq) |= 1 << Voice; /* set irq slot */
}
else
{
GUSregd(voicevolrampirq) &= (~(1 << Voice)); /* clear irq slot */
GUSvoice(wVSRVolRampControl) &= 0x7f00;
}
if (!(GUSvoice(wVSRControl) & 0x100))
{
CurrPos += VoiceIncrement;
if ((GUSvoice(wVSRControl) & 0x4000) ? (CurrPos <= LoopStart) : (CurrPos >= LoopEnd)) /* playback boundary cross */
{
if (GUSvoice(wVSRControl) & 0x2000)
GUSvoice(wVSRControl) |= 0x8000; /* voice IRQ enabled -> IRQ wait flag */
if (GUSvoice(wVSRControl) & 0x800) /* loop enabled */
{
if (GUSvoice(wVSRControl) & 0x1000) /* pingpong loop */
{
GUSvoice(wVSRControl) ^= 0x4000; /* toggle dir */
VoiceIncrement = -VoiceIncrement;
}
else
CurrPos = (GUSvoice(wVSRControl) & 0x4000) ? LoopEnd : LoopStart; /* unidir. loop */
}
else if (!(GUSvoice(wVSRVolRampControl) & 0x400))
GUSvoice(wVSRControl) |= 0x100; /* loop disabled, rollover check */
}
}
if ((GUSvoice(wVSRControl) & 0xa000) == 0xa000) /* wavetable IRQ set and enabled? */
{
GUSregd(voicewavetableirq) |= 1 << Voice; /* set irq slot */
}
else
{
GUSregd(voicewavetableirq) &= (~(1 << Voice)); /* clear irq slot */
GUSvoice(wVSRControl) &= 0x7f00;
}
/* mix samples into buffer */
*(bufferpos + 2 * sample) += (short) ((sample1 * PanningPos) >> 4); /* right */
*(bufferpos + 2 * sample + 1) += (short) ((sample1 * (15 - PanningPos)) >> 4); /* left */
}
/* write back voice and volume */
GUSvoice(wVSRCurrVol) = Volume32 / 32;
GUSvoice(wVSRCurrPosHi) = CurrPos >> 16;
GUSvoice(wVSRCurrPosLo) = CurrPos & 0xffff;
}
voiceptr += 16; /* next voice */
}
}
void gus_irqgen(GUSEmuState * state, unsigned int elapsed_time)
/* time given in microseconds */
{
int requestedIRQs = 0;
GUSbyte *gusptr;
gusptr = state->gusdatapos;
if (GUSregb(TimerDataReg2x9) & 1) /* start timer 1 (80us decrement rate) */
{
unsigned int timer1fraction = state->timer1fraction;
int newtimerirqs;
newtimerirqs = (elapsed_time + timer1fraction) / (80 * (256 - GUSregb(GUS46Counter1)));
state->timer1fraction = (elapsed_time + timer1fraction) % (80 * (256 - GUSregb(GUS46Counter1)));
if (newtimerirqs)
{
if (!(GUSregb(TimerDataReg2x9) & 0x40))
GUSregb(TimerStatus2x8) |= 0xc0; /* maskable bits */
if (GUSregb(GUS45TimerCtrl) & 4) /* timer1 irq enable */
{
GUSregb(TimerStatus2x8) |= 4; /* nonmaskable bit */
GUSregb(IRQStatReg2x6) |= 4; /* timer 1 irq pending */
GUSregw(TimerIRQs) += newtimerirqs;
requestedIRQs += newtimerirqs;
}
}
}
if (GUSregb(TimerDataReg2x9) & 2) /* start timer 2 (320us decrement rate) */
{
unsigned int timer2fraction = state->timer2fraction;
int newtimerirqs;
newtimerirqs = (elapsed_time + timer2fraction) / (320 * (256 - GUSregb(GUS47Counter2)));
state->timer2fraction = (elapsed_time + timer2fraction) % (320 * (256 - GUSregb(GUS47Counter2)));
if (newtimerirqs)
{
if (!(GUSregb(TimerDataReg2x9) & 0x20))
GUSregb(TimerStatus2x8) |= 0xa0; /* maskable bits */
if (GUSregb(GUS45TimerCtrl) & 8) /* timer2 irq enable */
{
GUSregb(TimerStatus2x8) |= 2; /* nonmaskable bit */
GUSregb(IRQStatReg2x6) |= 8; /* timer 2 irq pending */
GUSregw(TimerIRQs) += newtimerirqs;
requestedIRQs += newtimerirqs;
}
}
}
if (GUSregb(GUS4cReset) & 0x4) /* synth IRQ enable */
{
if (GUSregd(voicewavetableirq))
GUSregb(IRQStatReg2x6) |= 0x20;
if (GUSregd(voicevolrampirq))
GUSregb(IRQStatReg2x6) |= 0x40;
}
if ((!requestedIRQs) && GUSregb(IRQStatReg2x6))
requestedIRQs++;
if (GUSregb(IRQStatReg2x6))
GUSregw(BusyTimerIRQs) = GUS_irqrequest(state, state->gusirq, requestedIRQs);
}

132
hw/gustate.h Normal file
View File

@ -0,0 +1,132 @@
/*
* GUSEMU32 - persistent GUS register state
*
* Copyright (C) 2000-2007 Tibor "TS" Schütz
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUSTATE_H
#define GUSTATE_H
/*state block offset*/
#define gusdata (0)
/* data stored using this structure is in host byte order! */
/*access type*/
#define PortRead (0)
#define PortWrite (1)
#define Port8Bitacc (0)
#define Port16Bitacc (1)
/*voice register offsets (in bytes)*/
#define VSRegs (0)
#define VSRControl (0)
#define VSRegsEnd (VSRControl+VSRegs + 32*(16*2))
#define VSRFreq (2)
#define VSRLoopStartHi (4)
#define VSRLoopStartLo (6)
#define VSRLoopEndHi (8)
#define VSRLoopEndLo (10)
#define VSRVolRampRate (12)
#define VSRVolRampStartVol (14)
#define VSRVolRampEndVol (16)
#define VSRCurrVol (18)
#define VSRCurrPosHi (20)
#define VSRCurrPosLo (22)
#define VSRPanning (24)
#define VSRVolRampControl (26)
/*voice register offsets (in words)*/
#define wVSRegs (0)
#define wVSRControl (0)
#define wVSRegsEnd (wVSRControl+wVSRegs + 32*(16))
#define wVSRFreq (1)
#define wVSRLoopStartHi (2)
#define wVSRLoopStartLo (3)
#define wVSRLoopEndHi (4)
#define wVSRLoopEndLo (5)
#define wVSRVolRampRate (6)
#define wVSRVolRampStartVol (7)
#define wVSRVolRampEndVol (8)
#define wVSRCurrVol (9)
#define wVSRCurrPosHi (10)
#define wVSRCurrPosLo (11)
#define wVSRPanning (12)
#define wVSRVolRampControl (13)
/*GUS register state block: 32 voices, padding filled with remaining registers*/
#define DataRegLoByte3x4 (VSRVolRampControl+2)
#define DataRegWord3x4 (DataRegLoByte3x4)
#define DataRegHiByte3x5 (VSRVolRampControl+2 +1)
#define DMA_2xB (VSRVolRampControl+2+2)
#define IRQ_2xB (VSRVolRampControl+2+3)
#define RegCtrl_2xF (VSRVolRampControl+2+(16*2))
#define Jumper_2xB (VSRVolRampControl+2+(16*2)+1)
#define GUS42DMAStart (VSRVolRampControl+2+(16*2)+2)
#define GUS43DRAMIOlo (VSRVolRampControl+2+(16*2)*2)
#define GUSDRAMPOS24bit (GUS43DRAMIOlo)
#define GUS44DRAMIOhi (VSRVolRampControl+2+(16*2)*2+2)
#define voicewavetableirq (VSRVolRampControl+2+(16*2)*3) /* voice IRQ pseudoqueue: 1 bit per voice */
#define voicevolrampirq (VSRVolRampControl+2+(16*2)*4) /* voice IRQ pseudoqueue: 1 bit per voice */
#define startvoices (VSRVolRampControl+2+(16*2)*5) /* statistics / optimizations */
#define IRQStatReg2x6 (VSRVolRampControl+2+(16*2)*6)
#define TimerStatus2x8 (VSRVolRampControl+2+(16*2)*6+1)
#define TimerDataReg2x9 (VSRVolRampControl+2+(16*2)*6+2)
#define MixerCtrlReg2x0 (VSRVolRampControl+2+(16*2)*6+3)
#define VoiceSelReg3x2 (VSRVolRampControl+2+(16*2)*7)
#define FunkSelReg3x3 (VSRVolRampControl+2+(16*2)*7+1)
#define AdLibStatus2x8 (VSRVolRampControl+2+(16*2)*7+2)
#define StatRead_2xF (VSRVolRampControl+2+(16*2)*7+3)
#define GUS48SampSpeed (VSRVolRampControl+2+(16*2)*8)
#define GUS41DMACtrl (VSRVolRampControl+2+(16*2)*8+1)
#define GUS45TimerCtrl (VSRVolRampControl+2+(16*2)*8+2)
#define GUS46Counter1 (VSRVolRampControl+2+(16*2)*8+3)
#define GUS47Counter2 (VSRVolRampControl+2+(16*2)*9)
#define GUS49SampCtrl (VSRVolRampControl+2+(16*2)*9+1)
#define GUS4cReset (VSRVolRampControl+2+(16*2)*9+2)
#define NumVoices (VSRVolRampControl+2+(16*2)*9+3)
#define TimerIRQs (VSRVolRampControl+2+(16*2)*10) /* delayed IRQ, statistics */
#define BusyTimerIRQs (VSRVolRampControl+2+(16*2)*10+2) /* delayed IRQ, statistics */
#define AdLibCommand2xA (VSRVolRampControl+2+(16*2)*11)
#define AdLibData2x9 (VSRVolRampControl+2+(16*2)*11+1)
#define SB2xCd (VSRVolRampControl+2+(16*2)*11+2)
#define SB2xE (VSRVolRampControl+2+(16*2)*11+3)
#define SynVoiceIRQ8f (VSRVolRampControl+2+(16*2)*12)
#define GUS50DMAHigh (VSRVolRampControl+2+(16*2)*12+1)
#define portaccesses (VSRegsEnd) /* statistics / suspend mode */
#define gusdataend (VSRegsEnd+4)
#endif /* gustate.h */

6
qemu-doc.texi
View File

@ -175,14 +175,16 @@ PCI UHCI USB controller and a virtual USB hub.
SMP is supported with up to 255 CPUs.
Note that adlib and ac97 are only available when QEMU was configured
with --enable-adlib, --enable-ac97 respectively.
Note that adlib, ac97 and gus are only available when QEMU was configured
with --enable-adlib, --enable-ac97 or --enable-gus respectively.
QEMU uses the PC BIOS from the Bochs project and the Plex86/Bochs LGPL
VGA BIOS.
QEMU uses YM3812 emulation by Tatsuyuki Satoh.
QEMU uses GUS emulation(GUSEMU32) by Tibor "TS" Schütz.
@c man end
@node pcsys_quickstart