/* * t6721.h - Toshiba 6721a Emulation * * Written by * groepaz * * This file is part of VICE, the Versatile Commodore Emulator. * See README for copyright notice. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA * 02111-1307 USA. * */ #ifndef VICE_T6721_H #define VICE_T6721_H #include "types.h" /* t6721a.pdf:581 status output */ #define T6721_STATUS_END_OF_SPEECH 0x01 #define T6721_STATUS_SYSTEM_POWER_DOWN 0x02 #define T6721_STATUS_ROM_DATA_ERROR 0x04 #define T6721_STATUS_COMMAND_ERROR 0x08 /* t6721a.pdf:577,578 commands */ #define T6721_COMMAND_NOP 0x00 #define T6721_COMMAND_STRT 0x01 #define T6721_COMMAND_STOP 0x02 #define T6721_COMMAND_ADLD 0x03 /* 6 nibbles */ #define T6721_COMMAND_AAGN 0x04 #define T6721_COMMAND_SPLD 0x05 /* 2 nibbles */ #define T6721_COMMAND_CNDT1 0x06 /* 2 nibbles */ #define T6721_COMMAND_CNDT2 0x07 /* 2 nibbles */ #define T6721_COMMAND_RRDM 0x08 #define T6721_COMMAND_SPDN 0x09 #define T6721_COMMAND_APDN 0x0a #define T6721_COMMAND_SAGN 0x0b /* 0x0c..0x0f are "redundant" */ #define T6721_COMMAND_UND_0C 0x0c #define T6721_COMMAND_UND_0D 0x0d #define T6721_COMMAND_UND_0E 0x0e #define T6721_COMMAND_UND_0F 0x0f /* t6721a.pdf:571 codes for speed */ #define T6721_SPEED_0_7 0x01 #define T6721_SPEED_0_8 0x02 #define T6721_SPEED_0_9 0x03 #define T6721_SPEED_1_0 0x04 #define T6721_SPEED_1_1 0x05 #define T6721_SPEED_1_2 0x06 #define T6721_SPEED_1_3 0x07 #define T6721_SPEED_1_4 0x08 #define T6721_SPEED_1_5 0x09 #define T6721_SPEED_1_55 0x0a /* 0x00, 0x0b..0x0f are undefined */ #define T6721_SPEED_UND_00 0x00 #define T6721_SPEED_UND_0B 0x0b #define T6721_SPEED_UND_0C 0x0c #define T6721_SPEED_UND_0D 0x0d #define T6721_SPEED_UND_0E 0x0e #define T6721_SPEED_UND_0F 0x0f /* t6721a.pdf:580 bits of CONDITION 1 */ #define T6721_COND1_LOSS (1 << 2) #define T6721_COND1_SHAPE (1 << 3) /* bit 0..1 should be 0 */ #define T6721_COND1_UND0 (1 << 0) #define T6721_COND1_UND1 (1 << 1) /* t6721a.pdf:580 bits of CONDITION 2 */ #define T6721_COND2_STAGES (1 << 0) /* filter stages 0: 10 1: 8 */ #define T6721_COND2_REPEAT (1 << 1) /* repeat 0: available 1: none */ #define T6721_COND2_LENGTH (1 << 2) /* frame lemgth 0: 20ms 1: 10ms */ #define T6721_COND2_BPFRAME (1 << 3) /* bits per frame 0: 48 1: 96 */ /* parameter values for CONDITION 1 */ #define T6721_LOSS_DISABLED 0 #define T6721_LOSS_ENABLED 1 #define T6721_SHAPE_PITCH 0 #define T6721_SHAPE_TRIANGLE 1 /* parameter values for CONDITION 2 */ #define T6721_STAGES_8 8 #define T6721_STAGES_10 10 #define T6721_REPEAT_DISABLED 0 #define T6721_REPEAT_ENABLED 1 #define T6721_FRAME_10MS 1 #define T6721_FRAME_20MS 2 #define T6721_FRAME_48BIT 0 #define T6721_FRAME_96BIT 1 /* reading from D0..D3 either gives status or speach ROM */ #define T6721_READMODE_STATUS 0 #define T6721_READMODE_ROM 1 /* t6721a.pdf:595 pin description */ #define T6721_FRAMETYPE_EOS 0 /* 1 */ #define T6721_FRAMETYPE_ZERO 1 /* 1 */ #define T6721_FRAMETYPE_SILENT 2 /* 1 */ #define T6721_FRAMETYPE_UNVOICED 3 /* 6 */ #define T6721_FRAMETYPE_VOICED 4 /* 12 */ typedef struct _t6721_state { int cmd_nibbles; /* nibbles left for current command */ int cmd_current; /* current command */ int speed; /* set by speed load cmd */ int condition1; /* set by condition1 cmd */ int condition2; /* set by condition2 cmd */ /* individual parameter values set by condition1 and condition 2 */ int cond1_loss; int cond1_shape; int cond2_stages; int cond2_repeat; int cond2_framelen; int cond2_framebits; int rd, wr; /* input: read and write */ int rd_last, wr_last; /* internal flags for edge triggered operation */ int busy; /* output: BSY busy */ int apd; /* output: APD external APD audio power down */ int eos; /* output: EOS end of speech */ int dtrd; /* output: data read */ int status; /* output: D0..D3 */ int playing; /* chip is playing audio */ int playing_delay; int readmode; /* chip readmode, rom or status */ int eos_samples; /* samples left until eos is deasserted */ int samples_per_sec; /* output samples per second */ int cycles_per_sec; /* CPU/System cycles per second */ int cycles_done; /* number of cycles the chip has run since last update_output */ uint8_t (*read_data)(struct _t6721_state*, unsigned int *bit); /* input: DI */ void (*set_apd)(struct _t6721_state*); void (*set_eos)(struct _t6721_state*); void (*set_dtrd)(struct _t6721_state*); } t6721_state; void t6721_reset(t6721_state *t6721); void t6721_sound_machine_init(t6721_state *t6721, int samples_per_sec, int cycles_per_sec); void t6721_sound_machine_init_vbr(t6721_state *t6721, int speed, int cycles_per_sec, int factor); /* read/write from/to d0..d3 */ uint8_t t6721_read(t6721_state *t6721); /* read from d0..d3 (status) */ void t6721_store(t6721_state *t6721, uint8_t data); /* store to d0..d3 (command) */ /* run chip for N cpu/system cycles */ void t6721_update_tick(t6721_state *t6721); void t6721_update_ticks(t6721_state *t6721, int ticks); /* update output sound buffer, run chip (remaining ticks) */ #ifdef SOUND_SYSTEM_FLOAT void t6721_update_output(t6721_state *t6721, float *buf, int num); #else void t6721_update_output(t6721_state *t6721, int16_t *buf, int num); #endif int t6721_dump(t6721_state *t6721); struct snapshot_s; int t6721_snapshot_read_module(struct snapshot_s *s, t6721_state *t6721); int t6721_snapshot_write_module(struct snapshot_s *s, t6721_state *t6721); #endif