be4808f6e2
This is based on Voxware 3.5, and corresponds to Amancio's `guspnp21'. Bug reports to Amancio, please!
262 lines
7.9 KiB
C
262 lines
7.9 KiB
C
/*
|
|
* opl3.h - Definitions of the OPL-3 registers
|
|
*
|
|
* Copyright by Hannu Savolainen 1993
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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 exeptions 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 PERCUSSION_REGISTER 0xbd /* Left side only */
|
|
#define TREMOLO_DEPTH 0x80
|
|
#define VIBRATO_DEPTH 0x40
|
|
#define PERCUSSION_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 halfs (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 halfs.
|
|
*
|
|
* 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}}
|
|
};
|