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/*
* opl3.h - Definitions of the OPL-3 registers
*/
/*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*/
/*
* The OPL-3 mode is switched on by writing 0x01, to the offset 5
* of the right side.
*
* Another special register at the right side is at offset 4. It contains
* a bit mask defining which voices are used as 4 OP voices.
*
* The percussive mode is implemented in the left side only.
*
* With the above exceptions the both sides can be operated independently.
*
* A 4 OP voice can be created by setting the corresponding
* bit at offset 4 of the right side.
*
* For example setting the rightmost bit (0x01) changes the
* first voice on the right side to the 4 OP mode. The fourth
* voice is made inaccessible.
*
* If a voice is set to the 2 OP mode, it works like 2 OP modes
* of the original YM3812 (AdLib). In addition the voice can
* be connected the left, right or both stereo channels. It can
* even be left unconnected. This works with 4 OP voices also.
*
* The stereo connection bits are located in the FEEDBACK_CONNECTION
* register of the voice (0xC0-0xC8). In 4 OP voices these bits are
* in the second half of the voice.
*/
/*
* Register numbers for the global registers
*/
#define TEST_REGISTER 0x01
#define ENABLE_WAVE_SELECT 0x20
#define TIMER1_REGISTER 0x02
#define TIMER2_REGISTER 0x03
#define TIMER_CONTROL_REGISTER 0x04 /* Left side */
#define IRQ_RESET 0x80
#define TIMER1_MASK 0x40
#define TIMER2_MASK 0x20
#define TIMER1_START 0x01
#define TIMER2_START 0x02
#define CONNECTION_SELECT_REGISTER 0x04 /* Right side */
#define RIGHT_4OP_0 0x01
#define RIGHT_4OP_1 0x02
#define RIGHT_4OP_2 0x04
#define LEFT_4OP_0 0x08
#define LEFT_4OP_1 0x10
#define LEFT_4OP_2 0x20
#define OPL3_MODE_REGISTER 0x05 /* Right side */
#define OPL3_ENABLE 0x01
#define OPL4_ENABLE 0x02
#define KBD_SPLIT_REGISTER 0x08 /* Left side */
#define COMPOSITE_SINE_WAVE_MODE 0x80 /* Don't use with OPL-3? */
#define KEYBOARD_SPLIT 0x40
#define PERCOSSION_REGISTER 0xbd /* Left side only */
#define TREMOLO_DEPTH 0x80
#define VIBRATO_DEPTH 0x40
#define PERCOSSION_ENABLE 0x20
#define BASSDRUM_ON 0x10
#define SNAREDRUM_ON 0x08
#define TOMTOM_ON 0x04
#define CYMBAL_ON 0x02
#define HIHAT_ON 0x01
/*
* Offsets to the register banks for operators. To get the
* register number just add the operator offset to the bank offset
*
* AM/VIB/EG/KSR/Multiple (0x20 to 0x35)
*/
#define AM_VIB 0x20
#define TREMOLO_ON 0x80
#define VIBRATO_ON 0x40
#define SUSTAIN_ON 0x20
#define KSR 0x10 /* Key scaling rate */
#define MULTIPLE_MASK 0x0f /* Frequency multiplier */
/*
* KSL/Total level (0x40 to 0x55)
*/
#define KSL_LEVEL 0x40
#define KSL_MASK 0xc0 /* Envelope scaling bits */
#define TOTAL_LEVEL_MASK 0x3f /* Strength (volume) of OP */
/*
* Attack / Decay rate (0x60 to 0x75)
*/
#define ATTACK_DECAY 0x60
#define ATTACK_MASK 0xf0
#define DECAY_MASK 0x0f
/*
* Sustain level / Release rate (0x80 to 0x95)
*/
#define SUSTAIN_RELEASE 0x80
#define SUSTAIN_MASK 0xf0
#define RELEASE_MASK 0x0f
/*
* Wave select (0xE0 to 0xF5)
*/
#define WAVE_SELECT 0xe0
/*
* Offsets to the register banks for voices. Just add to the
* voice number to get the register number.
*
* F-Number low bits (0xA0 to 0xA8).
*/
#define FNUM_LOW 0xa0
/*
* F-number high bits / Key on / Block (octave) (0xB0 to 0xB8)
*/
#define KEYON_BLOCK 0xb0
#define KEYON_BIT 0x20
#define BLOCKNUM_MASK 0x1c
#define FNUM_HIGH_MASK 0x03
/*
* Feedback / Connection (0xc0 to 0xc8)
*
* These registers have two new bits when the OPL-3 mode
* is selected. These bits controls connecting the voice
* to the stereo channels. For 4 OP voices this bit is
* defined in the second half of the voice (add 3 to the
* register offset).
*
* For 4 OP voices the connection bit is used in the
* both halves (gives 4 ways to connect the operators).
*/
#define FEEDBACK_CONNECTION 0xc0
#define FEEDBACK_MASK 0x0e /* Valid just for 1st OP of a voice */
#define CONNECTION_BIT 0x01
/*
* In the 4 OP mode there is four possible configurations how the
* operators can be connected together (in 2 OP modes there is just
* AM or FM). The 4 OP connection mode is defined by the rightmost
* bit of the FEEDBACK_CONNECTION (0xC0-0xC8) on the both halves.
*
* First half Second half Mode
*
* +---+
* v |
* 0 0 >+-1-+--2--3--4-->
*
*
*
* +---+
* | |
* 0 1 >+-1-+--2-+
* |->
* >--3----4-+
*
* +---+
* | |
* 1 0 >+-1-+-----+
* |->
* >--2--3--4-+
*
* +---+
* | |
* 1 1 >+-1-+--+
* |
* >--2--3-+->
* |
* >--4----+
*/
#define STEREO_BITS 0x30 /* OPL-3 only */
#define VOICE_TO_LEFT 0x10
#define VOICE_TO_RIGHT 0x20
/*
* Definition table for the physical voices
*/
struct physical_voice_info {
unsigned char voice_num;
unsigned char voice_mode; /* 0=unavailable, 2=2 OP, 4=4 OP */
unsigned short ioaddr; /* I/O port (left or right side) */
unsigned char op[4]; /* Operator offsets */
};
/*
* There is 18 possible 2 OP voices
* (9 in the left and 9 in the right).
* The first OP is the modulator and 2nd is the carrier.
*
* The first three voices in the both sides may be connected
* with another voice to a 4 OP voice. For example voice 0
* can be connected with voice 3. The operators of voice 3 are
* used as operators 3 and 4 of the new 4 OP voice.
* In this case the 2 OP voice number 0 is the 'first half' and
* voice 3 is the second.
*/
#define USE_LEFT 0
#define USE_RIGHT 1
static struct physical_voice_info pv_map[18] =
{
/* No Mode Side OP1 OP2 OP3 OP4 */
/* --------------------------------------------------- */
{ 0, 2, USE_LEFT, {0x00, 0x03, 0x08, 0x0b}},
{ 1, 2, USE_LEFT, {0x01, 0x04, 0x09, 0x0c}},
{ 2, 2, USE_LEFT, {0x02, 0x05, 0x0a, 0x0d}},
{ 3, 2, USE_LEFT, {0x08, 0x0b, 0x00, 0x00}},
{ 4, 2, USE_LEFT, {0x09, 0x0c, 0x00, 0x00}},
{ 5, 2, USE_LEFT, {0x0a, 0x0d, 0x00, 0x00}},
{ 6, 2, USE_LEFT, {0x10, 0x13, 0x00, 0x00}}, /* Used by percussive voices */
{ 7, 2, USE_LEFT, {0x11, 0x14, 0x00, 0x00}}, /* if the percussive mode */
{ 8, 2, USE_LEFT, {0x12, 0x15, 0x00, 0x00}}, /* is selected */
{ 0, 2, USE_RIGHT, {0x00, 0x03, 0x08, 0x0b}},
{ 1, 2, USE_RIGHT, {0x01, 0x04, 0x09, 0x0c}},
{ 2, 2, USE_RIGHT, {0x02, 0x05, 0x0a, 0x0d}},
{ 3, 2, USE_RIGHT, {0x08, 0x0b, 0x00, 0x00}},
{ 4, 2, USE_RIGHT, {0x09, 0x0c, 0x00, 0x00}},
{ 5, 2, USE_RIGHT, {0x0a, 0x0d, 0x00, 0x00}},
{ 6, 2, USE_RIGHT, {0x10, 0x13, 0x00, 0x00}},
{ 7, 2, USE_RIGHT, {0x11, 0x14, 0x00, 0x00}},
{ 8, 2, USE_RIGHT, {0x12, 0x15, 0x00, 0x00}}
};
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