diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/gus.c | 300 | ||||
| -rw-r--r-- | hw/gusemu.h | 103 | ||||
| -rw-r--r-- | hw/gusemu_hal.c | 554 | ||||
| -rw-r--r-- | hw/gusemu_mixer.c | 240 | ||||
| -rw-r--r-- | hw/gustate.h | 132 |
5 files changed, 1329 insertions, 0 deletions
diff --git a/hw/gus.c b/hw/gus.c new file mode 100644 index 0000000000..57753a7f5c --- /dev/null +++ b/hw/gus.c @@ -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; +} diff --git a/hw/gusemu.h b/hw/gusemu.h new file mode 100644 index 0000000000..2e9c1c0c77 --- /dev/null +++ b/hw/gusemu.h @@ -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 */ diff --git a/hw/gusemu_hal.c b/hw/gusemu_hal.c new file mode 100644 index 0000000000..c6f9537483 --- /dev/null +++ b/hw/gusemu_hal.c @@ -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); + } + } +} diff --git a/hw/gusemu_mixer.c b/hw/gusemu_mixer.c new file mode 100644 index 0000000000..b3b5aa5d79 --- /dev/null +++ b/hw/gusemu_mixer.c @@ -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); +} diff --git a/hw/gustate.h b/hw/gustate.h new file mode 100644 index 0000000000..ece903abb9 --- /dev/null +++ b/hw/gustate.h @@ -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 */ |