6e2b91c3d1
Fixed FDI stream parameters passed to the 86F handler, FDI stream images now read correctly again; The National Semiconductors PC87306 SuperI/O chip now supports enhanced FDC mode.
755 lines
33 KiB
C
755 lines
33 KiB
C
/*12log2(r) * 4096
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freq = 2^((in - 0xe000) / 4096)*/
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/*LFO - lowest (0.042 Hz) = 2^20 steps = 1048576
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highest (10.72 Hz) = 2^12 steps = 4096*/
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#include <stdlib.h>
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#include <math.h>
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#include "ibm.h"
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#include "device.h"
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#include "sound.h"
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#include "sound_emu8k.h"
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#include "timer.h"
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enum
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{
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ENV_STOPPED = 0,
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ENV_ATTACK = 1,
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ENV_DECAY = 2,
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ENV_SUSTAIN = 3,
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ENV_RELEASE = 4
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};
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static int64_t freqtable[65536];
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static int attentable[256];
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static int envtable[4096];
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static int lfotable[4096];
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static int32_t filt_w0[256];
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/*static float filt_w0[256];*/
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#define READ16(addr, var) switch ((addr) & 2) \
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{ \
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case 0: ret = (var) & 0xffff; break; \
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case 2: ret = ((var) >> 16) & 0xffff; break; \
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}
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#define WRITE16(addr, var, val) switch ((addr) & 2) \
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{ \
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case 0: var = (var & 0xffff0000) | (val); break; \
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case 2: var = (var & 0x0000ffff) | ((val) << 16); break; \
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}
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static inline int16_t EMU8K_READ(emu8k_t *emu8k, uint32_t addr)
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{
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addr &= 0xffffff;
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if (addr < 0x80000)
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return emu8k->rom[addr];
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if (addr < 0x200000 || addr >= emu8k->ram_end_addr)
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return 0;
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if (!emu8k->ram)
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return 0;
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return emu8k->ram[addr - 0x200000];
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}
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static inline int16_t EMU8K_READ_INTERP(emu8k_t *emu8k, uint32_t addr)
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{
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int16_t dat1 = EMU8K_READ(emu8k, addr >> 8);
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int16_t dat2 = EMU8K_READ(emu8k, (addr >> 8) + 1);
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return ((dat1 * (0xff - (addr & 0xff))) + (dat2 * (addr & 0xff))) >> 8;
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}
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static inline void EMU8K_WRITE(emu8k_t *emu8k, uint32_t addr, uint16_t val)
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{
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addr &= 0xffffff;
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if (emu8k->ram && addr >= 0x200000 && addr < emu8k->ram_end_addr)
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emu8k->ram[addr - 0x200000] = val;
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}
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static int ff = 0;
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static int voice_count = 0;
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uint16_t emu8k_inw(uint32_t addr, void *p)
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{
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emu8k_t *emu8k = (emu8k_t *)p;
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uint16_t ret;
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/* pclog("emu8k_inw %04X reg=%i voice=%i\n", addr, emu8k->cur_reg, emu8k->cur_voice);*/
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addr -= 0x220;
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switch (addr & 0xc02)
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{
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case 0x400: case 0x402: /*Data0*/
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switch (emu8k->cur_reg)
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{
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case 0:
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READ16(addr, emu8k->voice[emu8k->cur_voice].cpf);
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return ret;
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case 1:
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READ16(addr, emu8k->voice[emu8k->cur_voice].ptrx);
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return ret;
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case 2:
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READ16(addr, emu8k->voice[emu8k->cur_voice].cvcf);
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return ret;
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case 3:
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READ16(addr, emu8k->voice[emu8k->cur_voice].vtft);
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return ret;
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case 4: case 5: /*???*/
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return 0xffff;
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case 6:
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READ16(addr, emu8k->voice[emu8k->cur_voice].psst);
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return ret;
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case 7:
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READ16(addr, emu8k->voice[emu8k->cur_voice].cpf);
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return ret;
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}
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break;
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case 0x800: /*Data1*/
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switch (emu8k->cur_reg)
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{
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case 0:
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{
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uint32_t val = (emu8k->voice[emu8k->cur_voice].ccca & 0xff000000) | (emu8k->voice[emu8k->cur_voice].addr >> 8);
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READ16(addr, emu8k->voice[emu8k->cur_voice].ccca);
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return ret;
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}
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case 1:
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switch (emu8k->cur_voice)
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{
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case 20:
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READ16(addr, emu8k->smalr);
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return ret;
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case 21:
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READ16(addr, emu8k->smarr);
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return ret;
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case 22:
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READ16(addr, emu8k->smalw);
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return ret;
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case 23:
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READ16(addr, emu8k->smarw);
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return ret;
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case 26:
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{
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uint16_t val = emu8k->smld_buffer;
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emu8k->smld_buffer = EMU8K_READ(emu8k, emu8k->smalr);
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/* pclog("emu8k_SMLR in %04X (%04X) %08X\n", val, emu8k->smld_buffer, emu8k->smalr);*/
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emu8k->smalr++;
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return val;
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}
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/*The EMU8000 PGM describes the return values of these registers as 'a VLSI error'*/
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case 29: /*Configuration Word 1*/
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return (emu8k->hwcf1 & 0xfe) | (emu8k->hwcf3 & 0x01);
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case 30: /*Configuration Word 2*/
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return ((emu8k->hwcf2 >> 4) & 0x0e) | (emu8k->hwcf1 & 0x01) | ((emu8k->hwcf3 & 0x02) ? 0x10 : 0) | ((emu8k->hwcf3 & 0x04) ? 0x40 : 0) | ((emu8k->hwcf3 & 0x08) ? 0x20 : 0) | ((emu8k->hwcf3 & 0x10) ? 0x80 : 0);
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case 31: /*Configuration Word 3*/
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return emu8k->hwcf2 & 0x1f;
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}
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break;
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case 2: /*INIT1*/
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case 3: /*INIT3*/
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return 0xffff; /*Can we read anything useful from here?*/
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case 5:
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return emu8k->voice[emu8k->cur_voice].dcysusv;
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case 7:
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return emu8k->voice[emu8k->cur_voice].dcysus;
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}
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break;
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case 0x802: /*Data2*/
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switch (emu8k->cur_reg)
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{
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case 0:
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{
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uint32_t val = (emu8k->voice[emu8k->cur_voice].ccca & 0xff000000) | (emu8k->voice[emu8k->cur_voice].addr >> 8);
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READ16(addr, emu8k->voice[emu8k->cur_voice].ccca);
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return ret;
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}
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case 1:
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switch (emu8k->cur_voice)
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{
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case 20:
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READ16(addr, emu8k->smalr | ff);
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ff ^= 0x80000000;
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return ret;
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case 21:
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READ16(addr, emu8k->smarr | ff);
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ff ^= 0x80000000;
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return ret;
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case 22:
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READ16(addr, emu8k->smalw);
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return ret;
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case 23:
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READ16(addr, emu8k->smarw);
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return ret;
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case 26:
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{
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uint16_t val = emu8k->smrd_buffer;
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emu8k->smrd_buffer = EMU8K_READ(emu8k, emu8k->smarr);
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/* pclog("emu8k_SMRR in %04X (%04X) %08X\n", val, emu8k->smrd_buffer, emu8k->smarr);*/
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emu8k->smarr++;
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return val;
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}
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case 27: /*Sample Counter*/
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return emu8k->wc;
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}
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break;
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case 2: /*INIT2*/
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case 3: /*INIT4*/
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return 0xffff; /*Can we read anything useful from here?*/
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case 4:
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return emu8k->voice[emu8k->cur_voice].atkhldv;
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}
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break;
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case 0xc00: /*Data3*/
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switch (emu8k->cur_reg)
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{
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case 0:
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return emu8k->voice[emu8k->cur_voice].ip;
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case 1:
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return emu8k->voice[emu8k->cur_voice].ifatn;
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case 2:
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return emu8k->voice[emu8k->cur_voice].pefe;
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case 3:
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return emu8k->voice[emu8k->cur_voice].fmmod;
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case 4:
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return emu8k->voice[emu8k->cur_voice].tremfrq;
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case 5:
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return emu8k->voice[emu8k->cur_voice].fm2frq2;
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case 6:
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return 0xffff;
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case 7: /*ID?*/
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return 0x1c | ((emu8k->id & 0x0002) ? 0xff02 : 0);
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}
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break;
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case 0xc02: /*Status - I think!*/
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voice_count = (voice_count + 1) & 0x1f;
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/* emu8k->c02_read ^= 0x1000;
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pclog("Read status %04X\n", 0x803f | (voice_count << 8));*/
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return 0x803f | (voice_count << 8);
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}
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/* fatal("Bad EMU8K inw from %08X\n", addr);*/
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return 0xffff;
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}
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void emu8k_outw(uint32_t addr, uint16_t val, void *p)
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{
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emu8k_t *emu8k = (emu8k_t *)p;
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emu8k_update(emu8k);
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/* pclog("emu8k_outw : addr=%08X reg=%i voice=%i val=%04X\n", addr, emu8k->cur_reg, emu8k->cur_voice, val);*/
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//emu8k_outw : addr=00000A22 reg=3 voice=21 val=0265
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addr -= 0x220;
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switch (addr & 0xc02)
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{
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case 0x400: case 0x402: /*Data0*/
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switch (emu8k->cur_reg)
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{
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case 0:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].cpf, val);
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return;
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case 1:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].ptrx, val);
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return;
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case 2:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].cvcf, val);
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return;
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case 3:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].vtft, val);
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return;
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case 6:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].psst, val);
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emu8k->voice[emu8k->cur_voice].loop_start = (uint64_t)(emu8k->voice[emu8k->cur_voice].psst & 0xffffff) << 32;
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if (addr & 2)
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{
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emu8k->voice[emu8k->cur_voice].vol_l = val >> 8;
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emu8k->voice[emu8k->cur_voice].vol_r = 255 - (val >> 8);
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}
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/* pclog("emu8k_outl : write PSST %08X l %i r %i\n", emu8k->voice[emu8k->cur_voice].psst, emu8k->voice[emu8k->cur_voice].vol_l, emu8k->voice[emu8k->cur_voice].vol_r);*/
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return;
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case 7:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].cpf, val);
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emu8k->voice[emu8k->cur_voice].loop_end = (uint64_t)(emu8k->voice[emu8k->cur_voice].cpf & 0xffffff) << 32;
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/* pclog("emu8k_outl : write CPF %08X\n", emu8k->voice[emu8k->cur_voice].cpf);*/
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return;
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}
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break;
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case 0x800: /*Data1*/
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switch (emu8k->cur_reg)
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{
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case 0:
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].ccca, val);
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emu8k->voice[emu8k->cur_voice].addr = (uint64_t)(emu8k->voice[emu8k->cur_voice].ccca & 0xffffff) << 32;
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/* pclog("emu8k_outl : write CCCA %08X\n", emu8k->voice[emu8k->cur_voice].ccca);*/
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return;
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case 1:
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switch (emu8k->cur_voice)
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{
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case 20:
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WRITE16(addr, emu8k->smalr, val);
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return;
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case 21:
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WRITE16(addr, emu8k->smarr, val);
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return;
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case 22:
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WRITE16(addr, emu8k->smalw, val);
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return;
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case 23:
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WRITE16(addr, emu8k->smarw, val);
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return;
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case 26:
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EMU8K_WRITE(emu8k, emu8k->smalw, val);
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/* pclog("emu8k_SMLW %04X %08X\n", val, emu8k->smalw);*/
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/* if (val = 0xffff && emu8k->smalw == 0x200000)
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output = 3;*/
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emu8k->smalw++;
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break;
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case 29: /*Configuration Word 1*/
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emu8k->hwcf1 = val;
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return;
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case 30: /*Configuration Word 2*/
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emu8k->hwcf2 = val;
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return;
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case 31: /*Configuration Word 3*/
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emu8k->hwcf3 = val;
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return;
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}
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break;
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case 5:
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/* pclog("emu8k_outw : write DCYSUSV %04X\n", val);*/
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emu8k->voice[emu8k->cur_voice].dcysusv = val;
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emu8k->voice[emu8k->cur_voice].env_sustain = (((val >> 8) & 0x7f) << 5) << 9;
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if (val & 0x8000) /*Release*/
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{
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emu8k->voice[emu8k->cur_voice].env_state = ENV_RELEASE;
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emu8k->voice[emu8k->cur_voice].env_release = val & 0x7f;
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}
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else /*Decay*/
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emu8k->voice[emu8k->cur_voice].env_decay = val & 0x7f;
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if (val & 0x80)
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emu8k->voice[emu8k->cur_voice].env_state = ENV_STOPPED;
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return;
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case 7:
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/* pclog("emu8k_outw : write DCYSUS %04X\n", val);*/
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emu8k->voice[emu8k->cur_voice].dcysus = val;
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emu8k->voice[emu8k->cur_voice].menv_sustain = (((val >> 8) & 0x7f) << 5) << 9;
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if (val & 0x8000) /*Release*/
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{
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emu8k->voice[emu8k->cur_voice].menv_state = ENV_RELEASE;
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emu8k->voice[emu8k->cur_voice].menv_release = val & 0x7f;
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}
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else /*Decay*/
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emu8k->voice[emu8k->cur_voice].menv_decay = val & 0x7f;
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if (val & 0x80)
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emu8k->voice[emu8k->cur_voice].menv_state = ENV_STOPPED;
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return;
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}
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break;
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case 0x802: /*Data2*/
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switch (emu8k->cur_reg)
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{
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case 0:
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{
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float q;
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WRITE16(addr, emu8k->voice[emu8k->cur_voice].ccca, val);
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emu8k->voice[emu8k->cur_voice].addr = (uint64_t)(emu8k->voice[emu8k->cur_voice].ccca & 0xffffff) << 32;
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q = (float)(emu8k->voice[emu8k->cur_voice].ccca >> 28) / 15.0f;
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q /= 10.0f; /*Horrible and wrong hack*/
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emu8k->voice[emu8k->cur_voice].q = (int32_t)((1.0f / (0.707f + q)) * 256.0f);
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/* pclog("emu8k_outl : write CCCA %08X Q %f invQ %X\n", emu8k->voice[emu8k->cur_voice].ccca, q, emu8k->voice[emu8k->cur_voice].q);*/
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}
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return;
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case 1:
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switch (emu8k->cur_voice)
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{
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case 20:
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WRITE16(addr, emu8k->smalr, val);
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return;
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case 21:
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WRITE16(addr, emu8k->smarr, val);
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return;
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case 22:
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WRITE16(addr, emu8k->smalw, val);
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return;
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case 23:
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WRITE16(addr, emu8k->smarw, val);
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return;
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case 26:
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EMU8K_WRITE(emu8k, emu8k->smarw, val);
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/* pclog("emu8k_SMRW %04X %08X\n", val, emu8k->smarw);*/
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emu8k->smarw++;
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break;
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}
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break;
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case 4:
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/* pclog("emu8k_outw : write ATKHLDV %04X\n", val);*/
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emu8k->voice[emu8k->cur_voice].atkhldv = val;
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emu8k->voice[emu8k->cur_voice].env_attack = (val & 0x7f) << 6;
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if (!(val & 0x8000)) /*Trigger attack*/
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emu8k->voice[emu8k->cur_voice].env_state = ENV_ATTACK;
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return;
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case 6:
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/* pclog("emu8k_outw : write ATKHLD %04X\n", val);*/
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emu8k->voice[emu8k->cur_voice].atkhld = val;
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emu8k->voice[emu8k->cur_voice].menv_attack = (val & 0x7f) << 6;
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if (!(val & 0x8000)) /*Trigger attack*/
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emu8k->voice[emu8k->cur_voice].menv_state = ENV_ATTACK;
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return;
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}
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break;
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case 0xc00: /*Data3*/
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switch (emu8k->cur_reg)
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{
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case 0:
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emu8k->voice[emu8k->cur_voice].ip = val;
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emu8k->voice[emu8k->cur_voice].pitch = val;
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return;
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case 1:
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emu8k->voice[emu8k->cur_voice].ifatn = val;
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emu8k->voice[emu8k->cur_voice].attenuation = attentable[val & 0xff];
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emu8k->voice[emu8k->cur_voice].cutoff = (val >> 8);
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/* pclog("Attenuation now %02X %i\n", val & 0xff, emu8k->voice[emu8k->cur_voice].attenuation);*/
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return;
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case 2:
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emu8k->voice[emu8k->cur_voice].pefe = val;
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emu8k->voice[emu8k->cur_voice].fe_height = (int8_t)(val & 0xff);
|
|
return;
|
|
|
|
case 3:
|
|
emu8k->voice[emu8k->cur_voice].fmmod = val;
|
|
emu8k->voice[emu8k->cur_voice].lfo1_fmmod = (val >> 8);
|
|
return;
|
|
|
|
case 4:
|
|
emu8k->voice[emu8k->cur_voice].tremfrq = val;
|
|
emu8k->voice[emu8k->cur_voice].lfo1_trem = (val >> 8);
|
|
return;
|
|
|
|
case 5:
|
|
emu8k->voice[emu8k->cur_voice].fm2frq2 = val;
|
|
emu8k->voice[emu8k->cur_voice].lfo2_fmmod = (val >> 8);
|
|
return;
|
|
|
|
case 7: /*ID?*/
|
|
emu8k->id = val;
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 0xc02: /*Pointer*/
|
|
emu8k->cur_voice = (val & 31);
|
|
emu8k->cur_reg = ((val >> 5) & 7);
|
|
return;
|
|
}
|
|
}
|
|
|
|
uint8_t emu8k_inb(uint32_t addr, void *p)
|
|
{
|
|
if (addr & 1)
|
|
return emu8k_inw(addr & ~1, p) >> 1;
|
|
return emu8k_inw(addr, p) & 0xff;
|
|
}
|
|
|
|
void emu8k_outb(uint32_t addr, uint8_t val, void *p)
|
|
{
|
|
if (addr & 1)
|
|
emu8k_outw(addr & ~1, val << 8, p);
|
|
else
|
|
emu8k_outw(addr, val, p);
|
|
}
|
|
|
|
void emu8k_update(emu8k_t *emu8k)
|
|
{
|
|
int new_pos = (sound_pos_global * 44100) / 48000;
|
|
if (emu8k->pos < new_pos)
|
|
{
|
|
int32_t *buf;
|
|
int pos;
|
|
int c;
|
|
int32_t out_l = 0, out_r = 0;
|
|
|
|
buf = &emu8k->buffer[emu8k->pos*2];
|
|
|
|
for (pos = emu8k->pos; pos < new_pos; pos++)
|
|
emu8k->buffer[pos*2] = emu8k->buffer[pos*2 + 1] = 0;
|
|
|
|
for (c = 0; c < 32; c++)
|
|
{
|
|
buf = &emu8k->buffer[emu8k->pos*2];
|
|
|
|
for (pos = emu8k->pos; pos < new_pos; pos++)
|
|
{
|
|
int32_t voice_l, voice_r;
|
|
int32_t dat;
|
|
int lfo1_vibrato, lfo2_vibrato;
|
|
int tremolo;
|
|
|
|
tremolo = ((lfotable[(emu8k->voice[c].lfo1_count >> 8) & 4095] * emu8k->voice[c].lfo1_trem) * 4) >> 12;
|
|
|
|
if (freqtable[emu8k->voice[c].pitch] >> 32)
|
|
dat = EMU8K_READ(emu8k, emu8k->voice[c].addr >> 32);
|
|
else
|
|
dat = EMU8K_READ_INTERP(emu8k, emu8k->voice[c].addr >> 24);
|
|
|
|
dat = (dat * emu8k->voice[c].attenuation) >> 16;
|
|
|
|
dat = (dat * envtable[emu8k->voice[c].env_vol >> 9]) >> 16;
|
|
|
|
if ((emu8k->voice[c].ccca >> 28) || (emu8k->voice[c].cutoff != 0xff))
|
|
{
|
|
int cutoff = emu8k->voice[c].cutoff + ((emu8k->voice[c].menv_vol * emu8k->voice[c].fe_height) >> 20);
|
|
if (cutoff < 0)
|
|
cutoff = 0;
|
|
if (cutoff > 255)
|
|
cutoff = 255;
|
|
|
|
emu8k->voice[c].vhp = ((-emu8k->voice[c].vbp * emu8k->voice[c].q) >> 8) - emu8k->voice[c].vlp - dat;
|
|
emu8k->voice[c].vlp += (emu8k->voice[c].vbp * filt_w0[cutoff]) >> 8;
|
|
emu8k->voice[c].vbp += (emu8k->voice[c].vhp * filt_w0[cutoff]) >> 8;
|
|
if (emu8k->voice[c].vlp < -32767)
|
|
dat = -32767;
|
|
else if (emu8k->voice[c].vlp > 32767)
|
|
dat = 32767;
|
|
else
|
|
dat = (int16_t)emu8k->voice[c].vlp;
|
|
}
|
|
|
|
voice_l = (dat * emu8k->voice[c].vol_l) >> 7;
|
|
voice_r = (dat * emu8k->voice[c].vol_r) >> 7;
|
|
|
|
(*buf++) += voice_l * 8192;
|
|
(*buf++) += voice_r * 8192;
|
|
|
|
switch (emu8k->voice[c].env_state)
|
|
{
|
|
case ENV_ATTACK:
|
|
emu8k->voice[c].env_vol += emu8k->voice[c].env_attack;
|
|
emu8k->voice[c].vtft |= 0xffff0000;
|
|
if (emu8k->voice[c].env_vol >= (1 << 21))
|
|
{
|
|
emu8k->voice[c].env_vol = 1 << 21;
|
|
emu8k->voice[c].env_state = ENV_DECAY;
|
|
}
|
|
break;
|
|
|
|
case ENV_DECAY:
|
|
emu8k->voice[c].env_vol -= emu8k->voice[c].env_decay;
|
|
emu8k->voice[c].vtft = (emu8k->voice[c].vtft & ~0xffff0000) | ((emu8k->voice[c].env_sustain >> 5) << 16);
|
|
if (emu8k->voice[c].env_vol <= emu8k->voice[c].env_sustain)
|
|
{
|
|
emu8k->voice[c].env_vol = emu8k->voice[c].env_sustain;
|
|
emu8k->voice[c].env_state = ENV_SUSTAIN;
|
|
}
|
|
break;
|
|
|
|
case ENV_RELEASE:
|
|
emu8k->voice[c].env_vol -= emu8k->voice[c].env_release;
|
|
emu8k->voice[c].vtft &= ~0xffff0000;
|
|
if (emu8k->voice[c].env_vol <= 0)
|
|
{
|
|
emu8k->voice[c].env_vol = 0;
|
|
emu8k->voice[c].env_state = ENV_STOPPED;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (emu8k->voice[c].env_vol >= (1 << 21))
|
|
emu8k->voice[c].cvcf &= ~0xffff0000;
|
|
else
|
|
emu8k->voice[c].cvcf = (emu8k->voice[c].cvcf & ~0xffff0000) | ((emu8k->voice[c].env_vol >> 5) << 16);
|
|
|
|
switch (emu8k->voice[c].menv_state)
|
|
{
|
|
case ENV_ATTACK:
|
|
emu8k->voice[c].menv_vol += emu8k->voice[c].menv_attack;
|
|
if (emu8k->voice[c].menv_vol >= (1 << 21))
|
|
{
|
|
emu8k->voice[c].menv_vol = 1 << 21;
|
|
emu8k->voice[c].menv_state = ENV_DECAY;
|
|
}
|
|
break;
|
|
|
|
case ENV_DECAY:
|
|
emu8k->voice[c].menv_vol -= emu8k->voice[c].menv_decay;
|
|
if (emu8k->voice[c].menv_vol <= emu8k->voice[c].menv_sustain)
|
|
{
|
|
emu8k->voice[c].menv_vol = emu8k->voice[c].menv_sustain;
|
|
emu8k->voice[c].menv_state = ENV_SUSTAIN;
|
|
}
|
|
break;
|
|
|
|
case ENV_RELEASE:
|
|
emu8k->voice[c].menv_vol -= emu8k->voice[c].menv_release;
|
|
if (emu8k->voice[c].menv_vol <= 0)
|
|
{
|
|
emu8k->voice[c].menv_vol = 0;
|
|
emu8k->voice[c].menv_state = ENV_STOPPED;
|
|
}
|
|
break;
|
|
}
|
|
|
|
lfo1_vibrato = (lfotable[(emu8k->voice[c].lfo1_count >> 8) & 4095] * emu8k->voice[c].lfo1_fmmod) >> 9;
|
|
lfo2_vibrato = (lfotable[(emu8k->voice[c].lfo2_count >> 8) & 4095] * emu8k->voice[c].lfo2_fmmod) >> 9;
|
|
|
|
emu8k->voice[c].addr += freqtable[(emu8k->voice[c].pitch + lfo1_vibrato + lfo2_vibrato) & 0xffff];
|
|
if (emu8k->voice[c].addr >= emu8k->voice[c].loop_end)
|
|
emu8k->voice[c].addr -= (emu8k->voice[c].loop_end - emu8k->voice[c].loop_start);
|
|
|
|
emu8k->voice[c].lfo1_count += (emu8k->voice[c].tremfrq & 0xff);
|
|
emu8k->voice[c].lfo2_count += (emu8k->voice[c].fm2frq2 & 0xff);
|
|
}
|
|
}
|
|
|
|
buf = &emu8k->buffer[emu8k->pos*2];
|
|
|
|
for (pos = emu8k->pos; pos < new_pos; pos++)
|
|
{
|
|
buf[0] >>= 15;
|
|
buf[1] >>= 15;
|
|
|
|
if (buf[0] < -32768)
|
|
buf[0] = -32768;
|
|
else if (buf[0] > 32767)
|
|
buf[0] = 32767;
|
|
|
|
if (buf[1] < -32768)
|
|
buf[1] = -32768;
|
|
else if (buf[1] > 32767)
|
|
buf[1] = 32767;
|
|
|
|
buf += 2;
|
|
}
|
|
|
|
emu8k->wc += (new_pos - emu8k->pos);
|
|
|
|
emu8k->pos = new_pos;
|
|
}
|
|
}
|
|
|
|
void emu8k_init(emu8k_t *emu8k, int onboard_ram)
|
|
{
|
|
FILE *f;
|
|
int c;
|
|
double out;
|
|
|
|
f = romfopen("roms/awe32.raw", "rb");
|
|
if (!f)
|
|
fatal("ROMS/AWE32.RAW not found\n");
|
|
|
|
if (onboard_ram)
|
|
{
|
|
emu8k->ram = malloc(onboard_ram * 1024);
|
|
emu8k->ram_end_addr = 0x200000 + ((onboard_ram * 1024) / 2);
|
|
}
|
|
|
|
emu8k->rom = malloc(1024 * 1024);
|
|
|
|
fread(emu8k->rom, 1024 * 1024, 1, f);
|
|
fclose(f);
|
|
|
|
/*AWE-DUMP creates ROM images offset by 2 bytes, so if we detect this
|
|
then correct it*/
|
|
if (emu8k->rom[3] == 0x314d && emu8k->rom[4] == 0x474d)
|
|
{
|
|
memcpy(&emu8k->rom[0], &emu8k->rom[1], (1024 * 1024) - 2);
|
|
emu8k->rom[0x7ffff] = 0;
|
|
}
|
|
io_sethandler(0x0620, 0x0004, emu8k_inb, emu8k_inw, NULL, emu8k_outb, emu8k_outw, NULL, emu8k);
|
|
io_sethandler(0x0a20, 0x0004, emu8k_inb, emu8k_inw, NULL, emu8k_outb, emu8k_outw, NULL, emu8k);
|
|
io_sethandler(0x0e20, 0x0004, emu8k_inb, emu8k_inw, NULL, emu8k_outb, emu8k_outw, NULL, emu8k);
|
|
|
|
/*Create frequency table*/
|
|
for (c = 0; c < 0x10000; c++)
|
|
{
|
|
freqtable[c] = (uint64_t)(exp2((double)(c - 0xe000) / 4096.0) * 65536.0 * 65536.0);
|
|
}
|
|
|
|
out = 65536.0;
|
|
|
|
for (c = 0; c < 256; c++)
|
|
{
|
|
attentable[c] = (int)out;
|
|
out /= sqrt(1.09018); /*0.375 dB steps*/
|
|
}
|
|
|
|
out = 65536;
|
|
|
|
for (c = 0; c < 4096; c++)
|
|
{
|
|
envtable[4095 - c] = (int)out;
|
|
out /= 1.002709201; /*0.0235 dB Steps*/
|
|
}
|
|
|
|
for (c = 0; c < 4096; c++)
|
|
{
|
|
int d = (c + 1024) & 4095;
|
|
if (d >= 2048)
|
|
lfotable[c] = 4096 - ((2048 - d) * 4);
|
|
else
|
|
lfotable[c] = (d * 4) - 4096;
|
|
}
|
|
|
|
out = 125.0;
|
|
for (c = 0; c < 256; c++)
|
|
{
|
|
/* filt_w0[c] = (int32_t)((2.0 * 3.142 * (out / 44100.0)) * 0.707 * 256.0);*/
|
|
/* filt_w0[c] = 2.0 * 3.142 * (out / 44100.0);*/
|
|
filt_w0[c] = (int32_t)(2.0 * 3.142 * (out / 44100.0) * 256.0);
|
|
out *= 1.016378315;
|
|
}
|
|
|
|
emu8k->hwcf1 = 0x59;
|
|
emu8k->hwcf2 = 0x20;
|
|
emu8k->hwcf3 = 0x04;
|
|
}
|
|
|
|
void emu8k_close(emu8k_t *emu8k)
|
|
{
|
|
free(emu8k->rom);
|
|
free(emu8k->ram);
|
|
}
|