paulaemul.h File Reference

Detailed Description

Paula emulator header.

Author:: Benjamin Gerard <ben@sashipa.com>

Date:: 1998/07/18

Id: paulaemul.h,v 2.2 2003/11/11 10:18:58 benjihan Exp

#include "emu68/struct68.h"

Go to the source code of this file.

Data Structures

struct paulav_t

Paula voice information data structure. More...

Amiga interruption registers

All hardware registers involved with interruption handling use the same bit organisation :

bit 7 Audio channel A
bit 8 Audio channel B
bit 9 Audio channel C
bit 10 Audio channel D
bit 14 Master interrupt

#define PAULA_INTREQR   0x1E

Interruption request read.

#define PAULA_INTREQRH   0x1E

Interruption request read MSB.

#define PAULA_INTREQRL   0x1F

Interruption request read LSB.

#define PAULA_INTREQ   0x9C

Interruption request write.

#define PAULA_INTREQH   0x9C

Interruption request write MSB.

#define PAULA_INTREQL   0x9D

Interruption request write LSB.

#define PAULA_INTENAR   0x1C

Interruption enable read.

#define PAULA_INTENARH   0x1C

Interruption enable read MSB.

#define PAULA_INTENARL   0x1D

Interruption enable read LSB.

#define PAULA_INTENA   0x9A

Interruption enable write.

#define PAULA_INTENAH   0x9A

Interruption enable write MSB.

#define PAULA_INTENAL   0x9B

Interruption enable write LSB.

Amiga DMA registers.

Amiga DMA control register bits :

bit 0 Audio DMA channel A
bit 1 Audio DMA channel B
bit 2 Audio DMA channel C
bit 3 Audio DMA channel D
bit 9 General DMA

#define PAULA_DMACONR   0x02

DMA control read.

#define PAULA_DMACONRH   0x02

DMA control read MSB.

#define PAULA_DMACONRL   0x03

DMA control read LSB.

#define PAULA_DMACON   0x96

DMA control write.

#define PAULA_DMACONH   0x96

DMA control write MSB.

#define PAULA_DMACONL   0x97

DMA control write LSB.

The Audio & Disk Control Registers.

Bits:

07 USE3PN Use audio channel 3 to modulate nothing.
06 USE2P3 Use audio channel 2 to modulate period of channel 3.
05 USE1P2 Use audio channel 1 to modulate period of channel 2.
04 USE0P1 Use audio channel 0 to modulate period of channel 1.
03 USE3VN Use audio channel 3 to modulate nothing.
02 USE2V3 Use audio channel 2 to modulate volume of channel 3.
01 USE1V2 Use audio channel 1 to modulate volume of channel 2.
00 USE0V1 Use audio channel 0 to modulate volume of channel 1.

Note:
If both period/volume are modulated on the same channel, the period and volume will be alternated. First word xxxxxxxx V6-V0, Second word P15-P0 (etc).

#define PAULA_ADKCON   0x9E

Audio, disk, control write.

#define PAULA_ADKCONR   0x10

Audio, disk, control read.

#define PAULA_ADKCONRH   0x10

Audio, disk, control write.

#define PAULA_ADKCONRL   0x11

Audio, disk, control write.

Amiga Paula registers.

#define PAULA_VOICE(I)   ((0xA+(I))<<4)

Paula channel I register base.

#define PAULA_VOICEA   0xA0

Paula channel A register base.

#define PAULA_VOICEB   0xB0

Paula channel B register base.

#define PAULA_VOICEC   0xC0

Paula channel C register base.

#define PAULA_VOICED   0xD0

Paula channel D register base.

Amiga Paula frequencies (PAL).

#define PAULA_PER   2.79365E-7

Paula period (1 cycle duration).

#define PAULA_FRQ   3579610.53837

Paula frequency (1/PAULA_PER).

Initialization functions.

unsigned int PL_sampling_rate (unsigned int f)

Set/Get sampling rate.

int PL_reset (void)

Paula hardware reset.

int PL_init (void)

Paula first one first initialization.

Emulation functions

void PL_mix (u32 *b, u8 *mem68, int n)

Execute Paula emulation.

Internal Paula emulation data.

u8 paula []

Paula regiter data storage.

paulav_t paulav []

Paula voices(channel) table (4 voices).

int paula_dmacon

Shadow DMACON.

int paula_intena

Shadow INTENA.

int paula_intreq

Shadow INTREQ.

int paula_adkcon

Shadow ADKCON.

int paula_interpol

Interpolation mode [0:none 1:linear].

Defines

#define PAULA_VHPOSR   0x06

Amiga Vertical/Horizontal electron bean position.

#define PAULA_CT_FIX   13

Counter fixed point precision 13+19(512kb)=>32 bit.