X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dos_sbtest;a=blobdiff_plain;f=src%2Fau_sb.c;fp=src%2Fau_sb.c;h=c49b2cf646da07a5f2f541d667263d89f927c546;hp=2046f915d515403865417373ac5642d88d390469;hb=07c19444f4f2a55abf97d181ab62aeaa51033c62;hpb=01a545fde6dc446fe626382f8bba50b9b7c1a35b diff --git a/src/au_sb.c b/src/au_sb.c index 2046f91..c49b2cf 100644 --- a/src/au_sb.c +++ b/src/au_sb.c @@ -1,431 +1,507 @@ -#include -#include -#include -#include -#include -#include -#include "audio.h" -#include "au_sb.h" -#include "dma.h" - -#define IRQ_TO_INTR(x) ((x) + 8) - -/* PIC command and data ports */ -#define PIC1_CMD 0x20 -#define PIC1_DATA 0x21 -#define PIC2_CMD 0xa0 -#define PIC2_DATA 0xa1 -/* PIC operation command word 2 bits */ -#define OCW2_EOI (1 << 5) - -#define REG_MIXPORT (base_port + 0x4) -#define REG_MIXDATA (base_port + 0x5) -#define REG_RESET (base_port + 0x6) -#define REG_RDATA (base_port + 0xa) -#define REG_WDATA (base_port + 0xc) -#define REG_WSTAT (base_port + 0xc) -#define REG_RSTAT (base_port + 0xe) -#define REG_INTACK (base_port + 0xe) -#define REG_INT16ACK (base_port + 0xf) - -#define WSTAT_BUSY 0x80 -#define RSTAT_RDY 0x80 - -#define CMD_RATE 0x40 -#define CMD_SB16_OUT_RATE 0x41 -#define CMD_SB16_IN_RATE 0x42 -#define CMD_GET_VER 0xe1 - -/* start DMA playback/recording. combine with fifo/auto/input flags */ -#define CMD_START_DMA8 0xc0 -#define CMD_START_DMA16 0xb0 -#define CMD_FIFO 0x02 -#define CMD_AUTO 0x04 -#define CMD_INPUT 0x08 - -/* immediately pause/continue */ -#define CMD_PAUSE_DMA8 0xd0 -#define CMD_ENABLE_OUTPUT 0xd1 -#define CMD_DISABLE_OUTPUT 0xd3 -#define CMD_CONT_DMA8 0xd4 -#define CMD_PAUSE_DMA16 0xd5 -#define CMD_CONT_DMA16 0xd6 - -/* end the playback at the end of the current buffer */ -#define CMD_END_DMA16 0xd9 -#define CMD_END_DMA8 0xda - -/* transfer mode commands */ -#define CMD_MODE_SIGNED 0x10 -#define CMD_MODE_STEREO 0x20 - -/* mixer registers */ -#define MIX_IRQ_SEL 0x80 -#define MIX_DMA_SEL 0x81 - -#define VER_MAJOR(x) ((x) >> 8) -#define VER_MINOR(x) ((x) & 0xff) - -/* delay for about 1us */ -#define iodelay() outportb(0x80, 0) - -static void intr_handler(); -static void start_dma_transfer(uint32_t addr, int size); -static void write_dsp(unsigned char val); -static unsigned char read_dsp(void); -static void write_mix(unsigned char val, int reg); -static unsigned char read_mix(int reg); -static int get_dsp_version(void); -static int sb16_detect_irq(void); -static int sb16_detect_dma(void); -static const char *sbname(int ver); - -extern unsigned char low_mem_buffer[]; - -static int base_port; -static int irq, dma_chan, dma16_chan; -static int sb16; -static void *buffer; -static int xfer_mode; - -int sb_detect(void) -{ - int i, ver; - - for(i=0; i<6; i++) { - base_port = 0x200 + ((i + 1) << 4); - if(sb_reset_dsp() == 0) { - ver = get_dsp_version(); - sb16 = VER_MAJOR(ver) >= 4; - - if(sb16) { - if(sb16_detect_irq() == -1) { - printf("sb_detect: failed to configure IRQ\n"); - return 0; - } - if(sb16_detect_dma() == -1) { - printf("sb_detect: failed to configure DMA\n"); - return 0; - } - - printf("sb_detect: found %s (DSP v%d.%02d) at port %xh, irq %d, dma %d/%d\n", - sbname(ver), VER_MAJOR(ver), VER_MINOR(ver), - base_port, irq, dma_chan, dma16_chan); - - } else { - /* XXX for old sound blasters, hard-code to IRQ 5 DMA 1 for now */ - irq = 5; - dma_chan = 1; - dma16_chan = -1; - - printf("sb_detect: found %s (DSP v%d.%02d) at port %xh\n", sbname(ver), - VER_MAJOR(ver), VER_MINOR(ver), base_port); - printf("sb_detect: old sound blaster dsp. assuming: irq 5, dma 1\n"); - } - - return 1; - } - } - - return 0; -} - -int sb_reset_dsp(void) -{ - int i; - - outportb(REG_RESET, 1); - for(i=0; i<3; i++) iodelay(); - outportb(REG_RESET, 0); - - for(i=0; i<128; i++) { - if(inportb(REG_RSTAT) & RSTAT_RDY) { - if(inportb(REG_RDATA) == 0xaa) { - return 0; - } - } - } - - return -1; -} - -void sb_set_output_rate(int rate) -{ - if(sb16) { - write_dsp(CMD_SB16_OUT_RATE); - write_dsp(rate >> 8); - write_dsp(rate & 0xff); - } else { - int tcon = 256 - 1000000 / rate; - write_dsp(CMD_RATE); - write_dsp(tcon); - } -} - -void *sb_buffer(int *size) -{ - *size = 65536; - return buffer; -} - -void sb_start(int rate, int nchan) -{ - int seg, pmsel; - uint32_t addr; - int size; - _go32_dpmi_seginfo intr; - - if(!buffer) { - __djgpp_nearptr_enable(); - - /* allocate a 64k-aligned 64k buffer in low memory */ - if((seg = __dpmi_allocate_dos_memory(65536 * 2 / 16, &pmsel)) <= 0) { - fprintf(stderr, "sb_start: failed to allocate DMA buffer\n"); - return; - } - - printf("allocated seg: %d, addr: %lx\n", seg, (unsigned long)seg << 4); - - addr = ((uint32_t)(seg << 4) + 0xffff) & 0xffff0000; - printf("aligned: %lx\n", (unsigned long)addr); - buffer = (void*)(addr - __djgpp_base_address); - } else { - addr = (uint32_t)buffer; - } - - xfer_mode = CMD_MODE_SIGNED; - if(nchan > 1) { - xfer_mode |= CMD_MODE_STEREO; - } - - if(!(size = audio_callback(buffer, 65536))) { - return; - } - - intr.pm_offset = (intptr_t)intr_handler; - intr.pm_selector = _go32_my_cs(); - _disable(); - _go32_dpmi_set_protected_mode_interrupt_vector(IRQ_TO_INTR(irq), &intr); - _enable(); - - sb_set_output_rate(rate); - start_dma_transfer(addr, size); - write_dsp(CMD_ENABLE_OUTPUT); -} - -void sb_pause(void) -{ - write_dsp(CMD_PAUSE_DMA8); -} - -void sb_continue(void) -{ - write_dsp(CMD_CONT_DMA8); -} - -void sb_stop(void) -{ - write_dsp(CMD_END_DMA8); - write_dsp(CMD_DISABLE_OUTPUT); -} - -void sb_volume(int vol) -{ - /* TODO */ -} - -static void intr_handler() -{ - int size; - - /* ask for more data */ - if(!(size = audio_callback(buffer, 65536))) { - sb_stop(); - return; - } - start_dma_transfer((uint32_t)buffer, size); - - /* acknowledge the interrupt */ - inportb(REG_INTACK); - - if(irq > 7) { - outportb(PIC2_CMD, OCW2_EOI); - } - outportb(PIC1_CMD, OCW2_EOI); -} - -static void start_dma_transfer(uint32_t addr, int size) -{ - /* set up the next DMA transfer */ - dma_out(dma_chan, addr, size, DMA_SINGLE); - - /* program the DSP to accept the DMA transfer */ - write_dsp(CMD_START_DMA8 | CMD_FIFO); - write_dsp(xfer_mode); - size--; - write_dsp(size & 0xff); - write_dsp((size >> 8) & 0xff); -} - -static void write_dsp(unsigned char val) -{ - while(inportb(REG_WSTAT) & WSTAT_BUSY); - outportb(REG_WDATA, val); -} - -static unsigned char read_dsp(void) -{ - while((inportb(REG_RSTAT) & RSTAT_RDY) == 0); - return inportb(REG_RDATA); -} - -static void write_mix(unsigned char val, int reg) -{ - outportb(REG_MIXPORT, reg); - outportb(REG_MIXDATA, val); -} - -static unsigned char read_mix(int reg) -{ - outportb(REG_MIXPORT, reg); - return inportb(REG_MIXDATA); -} - -static int get_dsp_version(void) -{ - int major, minor; - - write_dsp(CMD_GET_VER); - major = read_dsp(); - minor = read_dsp(); - - return (major << 8) | minor; -} - -static int sb16_detect_irq(void) -{ - int i, irqsel; - static int irqtab[] = {2, 5, 7, 10}; - - irq = 0; - irqsel = read_mix(MIX_IRQ_SEL); - for(i=0; i<4; i++) { - if(irqsel & (1 << i)) { - irq = irqtab[i]; - break; - } - } - if(!irq) { - /* try to force IRQ 5 */ - write_mix(2, MIX_IRQ_SEL); /* bit1 selects irq 5 */ - - /* re-read to verify */ - irqsel = read_mix(MIX_IRQ_SEL); - if(irqsel != 2) { - return -1; - } - irq = 5; - } - - return irq; -} - -static int sb16_detect_dma(void) -{ - int i, dmasel, tmp; - static int dmatab[] = {0, 1, -1, 3, -1, 5, 6, 7}; - - dma_chan = -1; - dma16_chan = -1; - dmasel = read_mix(MIX_DMA_SEL); - for(i=0; i<4; i++) { - if(dmasel & (1 << i)) { - dma_chan = dmatab[i]; - break; - } - } - for(i=5; i<8; i++) { - if(dmasel & (1 << i)) { - dma16_chan = dmatab[i]; - break; - } - } - if(dma_chan == -1) { - /* try to force DMA 1 */ - dmasel |= 2; - } - if(dma16_chan == -1) { - /* try to force 16bit DMA 5 */ - dmasel |= 0x20; - } - - if(dma_chan == -1 || dma16_chan == -1) { - write_mix(dmasel, MIX_DMA_SEL); - - /* re-read to verify */ - tmp = read_mix(MIX_DMA_SEL); - if(tmp != dmasel) { - return -1; - } - dma_chan = 1; - dma16_chan = 5; - } - - return dma_chan; -} - -#define V(maj, min) (((maj) << 8) | (min)) - -static const char *sbname(int ver) -{ - int major = VER_MAJOR(ver); - int minor = VER_MINOR(ver); - - switch(major) { - case 1: - if(minor == 5) { - return "Sound Blaster 1.5"; - } - return "Sound Blaster 1.0"; - - case 2: - if(minor == 1 || minor == 2) { - return "Sound Blaster 2.0"; - } - break; - - case 3: - switch(minor) { - case 0: - return "Sound Blaster Pro"; - case 1: - case 2: - return "Sound Blaster Pro 2"; - case 5: - return "Gallant SC-6000"; - default: - break; - } - break; - - case 4: - switch(minor) { - case 4: - case 5: - return "Sound Blaster 16"; - case 11: - return "Sound Blaster 16 SCSI-2"; - case 12: - return "Sound Blaster AWE 32"; - case 13: - return "Sound Blaster ViBRA16C"; - case 16: - return "Sound Blaster AWE 64"; - default: - break; - } - break; - } - - return "Unknown Sound Blaster"; -} +#include +#include +#include +#include +#include +#include "audio.h" +#include "au_sb.h" +#include "dpmi.h" +#include "dma.h" +#include "intr.h" + +#define REG_MIXPORT (base_port + 0x4) +#define REG_MIXDATA (base_port + 0x5) +#define REG_RESET (base_port + 0x6) +#define REG_RDATA (base_port + 0xa) +#define REG_WDATA (base_port + 0xc) +#define REG_WSTAT (base_port + 0xc) +#define REG_RSTAT (base_port + 0xe) +#define REG_INTACK (base_port + 0xe) +#define REG_INT16ACK (base_port + 0xf) + +#define WSTAT_BUSY 0x80 +#define RSTAT_RDY 0x80 + +#define DSP_RATE 0x40 +#define DSP4_OUT_RATE 0x41 +#define DSP4_IN_RATE 0x42 +#define DSP_GET_VER 0xe1 + +/* start DMA playback/recording. combine with fifo/auto/input flags */ +#define DSP4_START_DMA8 0xc0 +#define DSP4_START_DMA16 0xb0 +#define DSP4_FIFO 0x02 +#define DSP4_AUTO 0x04 +#define DSP4_INPUT 0x08 + +/* transfer mode commands */ +#define DSP4_MODE_SIGNED 0x10 +#define DSP4_MODE_STEREO 0x20 + +/* immediately pause/continue */ +#define DSP_PAUSE_DMA8 0xd0 +#define DSP_ENABLE_OUTPUT 0xd1 +#define DSP_DISABLE_OUTPUT 0xd3 +#define DSP_CONT_DMA8 0xd4 +#define DSP_PAUSE_DMA16 0xd5 +#define DSP_CONT_DMA16 0xd6 + +/* end the playback at the end of the current buffer */ +#define DSP_END_DMA16 0xd9 +#define DSP_END_DMA8 0xda + +/* mixer registers */ +#define MIX_MASTER 0x02 +#define MIX_VOICE 0x0a +#define MIX_SBPRO_VOICE 0x04 +#define MIX_SBPRO_MASTER 0x22 +#define MIX_SB16_MASTER_L 0x30 +#define MIX_SB16_MASTER_R 0x31 +#define MIX_SB16_VOICE_L 0x32 +#define MIX_SB16_VOICE_R 0x33 +#define MIX_SB16_IRQ_SEL 0x80 +#define MIX_SB16_DMA_SEL 0x81 + +#define VER_MAJOR(x) ((x) >> 8) +#define VER_MINOR(x) ((x) & 0xff) + +/* delay for about 1us */ +#define iodelay() outp(0x80, 0) + +static void INTERRUPT intr_handler(); +static void start_dsp4(int bits, unsigned int mode, int num_samples); +static void start_dsp(int nchan, int num_samples); +static void write_dsp(unsigned char val); +static unsigned char read_dsp(void); +static void write_mix(unsigned char val, int reg); +static unsigned char read_mix(int reg); +static int get_dsp_version(void); +static int dsp4_detect_irq(void); +static int dsp4_detect_dma(void); +static void print_dsp_info(void); +static const char *sbname(int ver); + +static int base_port; +static int irq, dma_chan, dma16_chan, dsp_ver; +static int dsp4; +static void *buffer; +static int xfer_mode; + +static int isplaying; +static int cur_bits, cur_mode; + +static void (INTERRUPT *prev_intr_handler)(); + +int sb_detect(void) +{ + int i; + char *env; + + if((env = getenv("BLASTER"))) { + dma16_chan = -1; + if(sscanf(env, "A%x I%d D%d H%d", &base_port, &irq, &dma_chan, &dma16_chan) >= 3) { + if(sb_reset_dsp() == 0) { + dsp_ver = get_dsp_version(); + dsp4 = VER_MAJOR(dsp_ver) >= 4 ? 1 : 0; + print_dsp_info(); + return 1; + } + } else { + printf("sb_detect: malformed BLASTER environment variable. Fallback to probing.\n"); + } + } + + for(i=0; i<6; i++) { + base_port = 0x200 + ((i + 1) << 4); + if(sb_reset_dsp() == 0) { + dsp_ver = get_dsp_version(); + dsp4 = VER_MAJOR(dsp_ver) >= 4 ? 1 : 0; + + if(dsp4) { + if(dsp4_detect_irq() == -1) { + printf("sb_detect: failed to configure IRQ\n"); + return 0; + } + if(dsp4_detect_dma() == -1) { + printf("sb_detect: failed to configure DMA\n"); + return 0; + } + + } else { + /* XXX for old sound blasters, hard-code to IRQ 5 DMA 1 for now */ + irq = 5; + dma_chan = 1; + dma16_chan = -1; + + printf("sb_detect: old sound blaster dsp. assuming: irq 5, dma 1\n"); + } + print_dsp_info(); + + return 1; + } + } + + return 0; +} + +int sb_reset_dsp(void) +{ + int i; + + outp(REG_RESET, 1); + for(i=0; i<3; i++) iodelay(); + outp(REG_RESET, 0); + + for(i=0; i<128; i++) { + if(inp(REG_RSTAT) & RSTAT_RDY) { + if(inp(REG_RDATA) == 0xaa) { + return 0; + } + } + } + + return -1; +} + +void sb_set_output_rate(int rate) +{ + if(dsp4) { + write_dsp(DSP4_OUT_RATE); + write_dsp(rate >> 8); + write_dsp(rate & 0xff); + } else { + int tcon = 256 - 1000000 / rate; + write_dsp(DSP_RATE); + write_dsp(tcon); + } +} + +void *sb_buffer(int *size) +{ + *size = 65536; + return buffer; +} + +void sb_start(int rate, int nchan) +{ + uint16_t seg, pmsel; + uint32_t addr; + int size; + + if(!buffer) { + /* allocate a 64k-aligned 64k buffer in low memory */ + if(!(seg = dpmi_alloc(65536 * 2 / 16, &pmsel))) { + fprintf(stderr, "sb_start: failed to allocate DMA buffer\n"); + return; + } + + printf("DBG allocated seg: %x, addr: %lx\n", (unsigned int)seg, + (unsigned long)seg << 4); + + addr = ((uint32_t)(seg << 4) + 0xffff) & 0xffff0000; + printf("DBG aligned: %lx\n", (unsigned long)addr); + buffer = (void*)addr; + } else { + addr = (uint32_t)buffer; + } + + if(!(size = audio_callback(buffer, 65536))) { + return; + } + + _disable(); + if(!prev_intr_handler) { + prev_intr_handler = _dos_getvect(IRQ_TO_INTR(irq)); + } + _dos_setvect(IRQ_TO_INTR(irq), intr_handler); + _enable(); + + unmask_irq(irq); + + cur_bits = 8; + cur_mode = 0; + if(nchan > 1) { + cur_mode |= DSP4_MODE_STEREO; + } + + write_dsp(DSP_ENABLE_OUTPUT); + dma_out(dma_chan, addr, size, DMA_SINGLE); + sb_set_output_rate(rate); + start_dsp4(cur_bits, cur_mode, size); + isplaying = 1; +} + +static void start_dsp4(int bits, unsigned int mode, int num_samples) +{ + unsigned char cmd = bits == 8 ? DSP4_START_DMA8 : DSP4_START_DMA16; + assert(bits == 8 || bits == 16); + + /* program the DSP to start the DMA transfer */ + write_dsp(cmd); + write_dsp(mode); + num_samples--; + write_dsp(num_samples & 0xff); + write_dsp((num_samples >> 8) & 0xff); +} + +static void start_dsp(int nchan, int num_samples) +{ + /* program the DSP to start the DMA transfer */ + /* TODO */ +} + +void sb_pause(void) +{ + write_dsp(cur_bits == 8 ? DSP_PAUSE_DMA8 : DSP_PAUSE_DMA16); +} + +void sb_continue(void) +{ + write_dsp(cur_bits == 8 ? DSP_CONT_DMA8 : DSP_CONT_DMA16); +} + +void sb_stop(void) +{ + write_dsp(DSP_DISABLE_OUTPUT); + + mask_irq(irq); + /* TODO: don't _enable, restore state */ + _disable(); + _dos_setvect(IRQ_TO_INTR(irq), prev_intr_handler); + _enable(); + + /* no need to stop anything if we're in single-cycle mode */ + if(cur_mode & DSP4_AUTO) { + write_dsp(cur_bits == 8 ? DSP_END_DMA8 : DSP_END_DMA16); + } + isplaying = 0; +} + +int sb_isplaying(void) +{ + return isplaying; +} + +void sb_volume(int vol) +{ + /* TODO */ +} + +static void INTERRUPT intr_handler() +{ + int size; + + /* ask for more data */ + if(!(size = audio_callback(buffer, 65536))) { + sb_stop(); + } else { + dma_out(dma_chan, (uint32_t)buffer, size, DMA_SINGLE); + start_dsp4(cur_bits, cur_mode, size); + } + + /* acknowledge the interrupt */ + inp(REG_INTACK); + + if(irq > 7) { + outp(PIC2_CMD, OCW2_EOI); + } + outp(PIC1_CMD, OCW2_EOI); +} + +static void write_dsp(unsigned char val) +{ + while(inp(REG_WSTAT) & WSTAT_BUSY); + outp(REG_WDATA, val); +} + +static unsigned char read_dsp(void) +{ + while((inp(REG_RSTAT) & RSTAT_RDY) == 0); + return inp(REG_RDATA); +} + +static void write_mix(unsigned char val, int reg) +{ + outp(REG_MIXPORT, reg); + outp(REG_MIXDATA, val); +} + +static unsigned char read_mix(int reg) +{ + outp(REG_MIXPORT, reg); + return inp(REG_MIXDATA); +} + +static int get_dsp_version(void) +{ + int major, minor; + + write_dsp(DSP_GET_VER); + major = read_dsp(); + minor = read_dsp(); + + return (major << 8) | minor; +} + +static int dsp4_detect_irq(void) +{ + int i, irqsel; + static int irqtab[] = {2, 5, 7, 10}; + + irq = 0; + irqsel = read_mix(MIX_SB16_IRQ_SEL); + for(i=0; i<4; i++) { + if(irqsel & (1 << i)) { + irq = irqtab[i]; + break; + } + } + if(!irq) { + /* try to force IRQ 5 */ + write_mix(2, MIX_SB16_IRQ_SEL); /* bit1 selects irq 5 */ + + /* re-read to verify */ + irqsel = read_mix(MIX_SB16_IRQ_SEL); + if(irqsel != 2) { + return -1; + } + irq = 5; + } + + return irq; +} + +static int dsp4_detect_dma(void) +{ + int i, dmasel, tmp; + static int dmatab[] = {0, 1, -1, 3, -1, 5, 6, 7}; + + dma_chan = -1; + dma16_chan = -1; + dmasel = read_mix(MIX_SB16_DMA_SEL); + for(i=0; i<4; i++) { + if(dmasel & (1 << i)) { + dma_chan = dmatab[i]; + break; + } + } + for(i=5; i<8; i++) { + if(dmasel & (1 << i)) { + dma16_chan = dmatab[i]; + break; + } + } + if(dma_chan == -1) { + /* try to force DMA 1 */ + dmasel |= 2; + } + if(dma16_chan == -1) { + /* try to force 16bit DMA 5 */ + dmasel |= 0x20; + } + + if(dma_chan == -1 || dma16_chan == -1) { + write_mix(dmasel, MIX_SB16_DMA_SEL); + + /* re-read to verify */ + tmp = read_mix(MIX_SB16_DMA_SEL); + if(tmp != dmasel) { + return -1; + } + dma_chan = 1; + dma16_chan = 5; + } + + return dma_chan; +} + +static void print_dsp_info(void) +{ + int master[2], voice[2]; + int val; + + printf("sb_detect: %s (DSP v%d.%02d) port %xh, irq %d", sbname(dsp_ver), + VER_MAJOR(dsp_ver), VER_MINOR(dsp_ver), base_port, irq); + if(VER_MAJOR(dsp_ver) >= 4) { + printf(" dma %d/%d\n", dma_chan, dma16_chan); + } else { + printf(" dma %d\n", dma_chan); + } + + if(VER_MAJOR(dsp_ver) >= 4) { + master[0] = 100 * (int)(read_mix(MIX_SB16_MASTER_L) >> 3) / 31; + master[1] = 100 * (int)(read_mix(MIX_SB16_MASTER_R) >> 3) / 31; + voice[0] = 100 * (int)(read_mix(MIX_SB16_VOICE_L) >> 3) / 31; + voice[1] = 100 * (int)(read_mix(MIX_SB16_VOICE_R) >> 3) / 31; + } else if(VER_MAJOR(dsp_ver) >= 3) { + val = read_mix(MIX_SBPRO_MASTER); + master[0] = 100 * (val >> 5) / 7; + master[1] = 100 * ((val >> 1) & 7) / 7; + val = read_mix(MIX_SBPRO_VOICE); + voice[0] = 100 * (val >> 5) / 7; + voice[1] = 100 * ((val >> 1) & 7) / 7; + } else { + val = read_mix(MIX_MASTER); + master[0] = master[1] = 100 * ((val >> 1) & 7) / 7; + val = read_mix(MIX_VOICE); + voice[0] = voice[1] = 100 * ((val >> 1) & 3) / 3; + } + printf(" mixer: master(%d|%d) voice(%d|%d)\n", master[0], master[1], + voice[0], voice[1]); +} + +#define V(maj, min) (((maj) << 8) | (min)) + +static const char *sbname(int ver) +{ + int major = VER_MAJOR(ver); + int minor = VER_MINOR(ver); + + switch(major) { + case 1: + if(minor == 5) { + return "Sound Blaster 1.5"; + } + return "Sound Blaster 1.0"; + + case 2: + if(minor == 1 || minor == 2) { + return "Sound Blaster 2.0"; + } + break; + + case 3: + switch(minor) { + case 0: + return "Sound Blaster Pro"; + case 1: + case 2: + return "Sound Blaster Pro 2"; + case 5: + return "Gallant SC-6000"; + default: + break; + } + break; + + case 4: + switch(minor) { + case 4: + case 5: + return "Sound Blaster 16"; + case 11: + return "Sound Blaster 16 SCSI-2"; + case 12: + return "Sound Blaster AWE 32"; + case 13: + return "Sound Blaster ViBRA16C"; + case 16: + return "Sound Blaster AWE 64"; + default: + break; + } + break; + } + + return "Unknown Sound Blaster"; +}