mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-12-26 03:30:46 +00:00
718112a8fe
Currently none of these is being used, but eventually they will, once more code gets ported over. So it's better to have them right away and avoid editing the project file too much, only to revert that later.
416 lines
9.7 KiB
C++
416 lines
9.7 KiB
C++
// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
|
|
|
|
#include "Kss_Emu.h"
|
|
|
|
#include "blargg_endian.h"
|
|
#include <string.h>
|
|
|
|
/* Copyright (C) 2006 Shay Green. This module is free software; you
|
|
can redistribute it and/or modify it under the terms of the GNU Lesser
|
|
General Public License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version. This
|
|
module 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 Lesser General Public License for more
|
|
details. You should have received a copy of the GNU Lesser General Public
|
|
License along with this module; if not, write to the Free Software Foundation,
|
|
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
#include "blargg_source.h"
|
|
|
|
long const clock_rate = 3579545;
|
|
int const osc_count = Ay_Apu::osc_count + Scc_Apu::osc_count;
|
|
|
|
Kss_Emu::Kss_Emu()
|
|
{
|
|
sn = 0;
|
|
set_type( gme_kss_type );
|
|
set_silence_lookahead( 6 );
|
|
static const char* const names [osc_count] = {
|
|
"Square 1", "Square 2", "Square 3",
|
|
"Wave 1", "Wave 2", "Wave 3", "Wave 4", "Wave 5"
|
|
};
|
|
set_voice_names( names );
|
|
|
|
static int const types [osc_count] = {
|
|
wave_type | 0, wave_type | 1, wave_type | 2,
|
|
wave_type | 3, wave_type | 4, wave_type | 5, wave_type | 6, wave_type | 7
|
|
};
|
|
set_voice_types( types );
|
|
|
|
memset( unmapped_read, 0xFF, sizeof unmapped_read );
|
|
}
|
|
|
|
Kss_Emu::~Kss_Emu() { unload(); }
|
|
|
|
void Kss_Emu::unload()
|
|
{
|
|
delete sn;
|
|
sn = 0;
|
|
Classic_Emu::unload();
|
|
}
|
|
|
|
// Track info
|
|
|
|
static void copy_kss_fields( Kss_Emu::header_t const& h, track_info_t* out )
|
|
{
|
|
const char* system = "MSX";
|
|
if ( h.device_flags & 0x02 )
|
|
{
|
|
system = "Sega Master System";
|
|
if ( h.device_flags & 0x04 )
|
|
system = "Game Gear";
|
|
}
|
|
Gme_File::copy_field_( out->system, system );
|
|
}
|
|
|
|
blargg_err_t Kss_Emu::track_info_( track_info_t* out, int ) const
|
|
{
|
|
copy_kss_fields( header_, out );
|
|
return 0;
|
|
}
|
|
|
|
static blargg_err_t check_kss_header( void const* header )
|
|
{
|
|
if ( memcmp( header, "KSCC", 4 ) && memcmp( header, "KSSX", 4 ) )
|
|
return gme_wrong_file_type;
|
|
return 0;
|
|
}
|
|
|
|
struct Kss_File : Gme_Info_
|
|
{
|
|
Kss_Emu::header_t header_;
|
|
|
|
Kss_File() { set_type( gme_kss_type ); }
|
|
|
|
blargg_err_t load_( Data_Reader& in )
|
|
{
|
|
blargg_err_t err = in.read( &header_, Kss_Emu::header_size );
|
|
if ( err )
|
|
return (err == in.eof_error ? gme_wrong_file_type : err);
|
|
return check_kss_header( &header_ );
|
|
}
|
|
|
|
blargg_err_t track_info_( track_info_t* out, int ) const
|
|
{
|
|
copy_kss_fields( header_, out );
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
static Music_Emu* new_kss_emu () { return BLARGG_NEW Kss_Emu ; }
|
|
static Music_Emu* new_kss_file() { return BLARGG_NEW Kss_File; }
|
|
|
|
static gme_type_t_ const gme_kss_type_ = { "MSX", 256, &new_kss_emu, &new_kss_file, "KSS", 0x03 };
|
|
BLARGG_EXPORT extern gme_type_t const gme_kss_type = &gme_kss_type_;
|
|
|
|
|
|
// Setup
|
|
|
|
void Kss_Emu::update_gain()
|
|
{
|
|
double g = gain() * 1.4;
|
|
if ( scc_accessed )
|
|
g *= 1.5;
|
|
ay.volume( g );
|
|
scc.volume( g );
|
|
if ( sn )
|
|
sn->volume( g );
|
|
}
|
|
|
|
blargg_err_t Kss_Emu::load_( Data_Reader& in )
|
|
{
|
|
memset( &header_, 0, sizeof header_ );
|
|
assert( offsetof (header_t,device_flags) == header_size - 1 );
|
|
assert( offsetof (ext_header_t,msx_audio_vol) == ext_header_size - 1 );
|
|
RETURN_ERR( rom.load( in, header_size, STATIC_CAST(header_t*,&header_), 0 ) );
|
|
|
|
RETURN_ERR( check_kss_header( header_.tag ) );
|
|
|
|
if ( header_.tag [3] == 'C' )
|
|
{
|
|
if ( header_.extra_header )
|
|
{
|
|
header_.extra_header = 0;
|
|
set_warning( "Unknown data in header" );
|
|
}
|
|
if ( header_.device_flags & ~0x0F )
|
|
{
|
|
header_.device_flags &= 0x0F;
|
|
set_warning( "Unknown data in header" );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ext_header_t& ext = header_;
|
|
memcpy( &ext, rom.begin(), min( (int) ext_header_size, (int) header_.extra_header ) );
|
|
if ( header_.extra_header > 0x10 )
|
|
set_warning( "Unknown data in header" );
|
|
}
|
|
|
|
if ( header_.device_flags & 0x09 )
|
|
set_warning( "FM sound not supported" );
|
|
|
|
scc_enabled = 0xC000;
|
|
if ( header_.device_flags & 0x04 )
|
|
scc_enabled = 0;
|
|
|
|
if ( header_.device_flags & 0x02 && !sn )
|
|
CHECK_ALLOC( sn = BLARGG_NEW( Sms_Apu ) );
|
|
|
|
set_voice_count( osc_count );
|
|
|
|
return setup_buffer( ::clock_rate );
|
|
}
|
|
|
|
void Kss_Emu::update_eq( blip_eq_t const& eq )
|
|
{
|
|
ay.treble_eq( eq );
|
|
scc.treble_eq( eq );
|
|
if ( sn )
|
|
sn->treble_eq( eq );
|
|
}
|
|
|
|
void Kss_Emu::set_voice( int i, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
|
|
{
|
|
int i2 = i - ay.osc_count;
|
|
if ( i2 >= 0 )
|
|
scc.osc_output( i2, center );
|
|
else
|
|
ay.osc_output( i, center );
|
|
if ( sn && i < sn->osc_count )
|
|
sn->osc_output( i, center, left, right );
|
|
}
|
|
|
|
// Emulation
|
|
|
|
void Kss_Emu::set_tempo_( double t )
|
|
{
|
|
blip_time_t period =
|
|
(header_.device_flags & 0x40 ? ::clock_rate / 50 : ::clock_rate / 60);
|
|
play_period = blip_time_t (period / t);
|
|
}
|
|
|
|
blargg_err_t Kss_Emu::start_track_( int track )
|
|
{
|
|
RETURN_ERR( Classic_Emu::start_track_( track ) );
|
|
|
|
memset( ram, 0xC9, 0x4000 );
|
|
memset( ram + 0x4000, 0, sizeof ram - 0x4000 );
|
|
|
|
// copy driver code to lo RAM
|
|
static byte const bios [] = {
|
|
0xD3, 0xA0, 0xF5, 0x7B, 0xD3, 0xA1, 0xF1, 0xC9, // $0001: WRTPSG
|
|
0xD3, 0xA0, 0xDB, 0xA2, 0xC9 // $0009: RDPSG
|
|
};
|
|
static byte const vectors [] = {
|
|
0xC3, 0x01, 0x00, // $0093: WRTPSG vector
|
|
0xC3, 0x09, 0x00, // $0096: RDPSG vector
|
|
};
|
|
memcpy( ram + 0x01, bios, sizeof bios );
|
|
memcpy( ram + 0x93, vectors, sizeof vectors );
|
|
|
|
// copy non-banked data into RAM
|
|
unsigned load_addr = get_le16( header_.load_addr );
|
|
long orig_load_size = get_le16( header_.load_size );
|
|
long load_size = min( orig_load_size, rom.file_size() );
|
|
load_size = min( load_size, long (mem_size - load_addr) );
|
|
if ( load_size != orig_load_size )
|
|
set_warning( "Excessive data size" );
|
|
memcpy( ram + load_addr, rom.begin() + header_.extra_header, load_size );
|
|
|
|
rom.set_addr( -load_size - header_.extra_header );
|
|
|
|
// check available bank data
|
|
blargg_long const bank_size = this->bank_size();
|
|
int max_banks = (rom.file_size() - load_size + bank_size - 1) / bank_size;
|
|
bank_count = header_.bank_mode & 0x7F;
|
|
if ( bank_count > max_banks )
|
|
{
|
|
bank_count = max_banks;
|
|
set_warning( "Bank data missing" );
|
|
}
|
|
//debug_printf( "load_size : $%X\n", load_size );
|
|
//debug_printf( "bank_size : $%X\n", bank_size );
|
|
//debug_printf( "bank_count: %d (%d claimed)\n", bank_count, header_.bank_mode & 0x7F );
|
|
|
|
ram [idle_addr] = 0xFF;
|
|
cpu::reset( unmapped_write, unmapped_read );
|
|
cpu::map_mem( 0, mem_size, ram, ram );
|
|
|
|
ay.reset();
|
|
scc.reset();
|
|
if ( sn )
|
|
sn->reset();
|
|
r.sp = 0xF380;
|
|
ram [--r.sp] = idle_addr >> 8;
|
|
ram [--r.sp] = idle_addr & 0xFF;
|
|
r.b.a = track;
|
|
r.pc = get_le16( header_.init_addr );
|
|
next_play = play_period;
|
|
scc_accessed = false;
|
|
gain_updated = false;
|
|
update_gain();
|
|
ay_latch = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void Kss_Emu::set_bank( int logical, int physical )
|
|
{
|
|
unsigned const bank_size = this->bank_size();
|
|
|
|
unsigned addr = 0x8000;
|
|
if ( logical && bank_size == 8 * 1024 )
|
|
addr = 0xA000;
|
|
|
|
physical -= header_.first_bank;
|
|
if ( (unsigned) physical >= (unsigned) bank_count )
|
|
{
|
|
byte* data = ram + addr;
|
|
cpu::map_mem( addr, bank_size, data, data );
|
|
}
|
|
else
|
|
{
|
|
long phys = physical * (blargg_long) bank_size;
|
|
for ( unsigned offset = 0; offset < bank_size; offset += page_size )
|
|
cpu::map_mem( addr + offset, page_size,
|
|
unmapped_write, rom.at_addr( phys + offset ) );
|
|
}
|
|
}
|
|
|
|
void Kss_Emu::cpu_write( unsigned addr, int data )
|
|
{
|
|
data &= 0xFF;
|
|
switch ( addr )
|
|
{
|
|
case 0x9000:
|
|
set_bank( 0, data );
|
|
return;
|
|
|
|
case 0xB000:
|
|
set_bank( 1, data );
|
|
return;
|
|
}
|
|
|
|
int scc_addr = (addr & 0xDFFF) ^ 0x9800;
|
|
if ( scc_addr < scc.reg_count )
|
|
{
|
|
scc_accessed = true;
|
|
scc.write( time(), scc_addr, data );
|
|
return;
|
|
}
|
|
|
|
debug_printf( "LD ($%04X),$%02X\n", addr, data );
|
|
}
|
|
|
|
void kss_cpu_write( Kss_Cpu* cpu, unsigned addr, int data )
|
|
{
|
|
*cpu->write( addr ) = data;
|
|
if ( (addr & STATIC_CAST(Kss_Emu&,*cpu).scc_enabled) == 0x8000 )
|
|
STATIC_CAST(Kss_Emu&,*cpu).cpu_write( addr, data );
|
|
}
|
|
|
|
void kss_cpu_out( Kss_Cpu* cpu, cpu_time_t time, unsigned addr, int data )
|
|
{
|
|
data &= 0xFF;
|
|
Kss_Emu& emu = STATIC_CAST(Kss_Emu&,*cpu);
|
|
switch ( addr & 0xFF )
|
|
{
|
|
case 0xA0:
|
|
emu.ay_latch = data & 0x0F;
|
|
return;
|
|
|
|
case 0xA1:
|
|
GME_APU_HOOK( &emu, emu.ay_latch, data );
|
|
emu.ay.write( time, emu.ay_latch, data );
|
|
return;
|
|
|
|
case 0x06:
|
|
if ( emu.sn && (emu.header_.device_flags & 0x04) )
|
|
{
|
|
emu.sn->write_ggstereo( time, data );
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 0x7E:
|
|
case 0x7F:
|
|
if ( emu.sn )
|
|
{
|
|
GME_APU_HOOK( &emu, 16, data );
|
|
emu.sn->write_data( time, data );
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case 0xFE:
|
|
emu.set_bank( 0, data );
|
|
return;
|
|
|
|
#ifndef NDEBUG
|
|
case 0xF1: // FM data
|
|
if ( data )
|
|
break; // trap non-zero data
|
|
case 0xF0: // FM addr
|
|
case 0xA8: // PPI
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
debug_printf( "OUT $%04X,$%02X\n", addr, data );
|
|
}
|
|
|
|
int kss_cpu_in( Kss_Cpu*, cpu_time_t, unsigned addr )
|
|
{
|
|
//Kss_Emu& emu = STATIC_CAST(Kss_Emu&,*cpu);
|
|
//switch ( addr & 0xFF )
|
|
//{
|
|
//}
|
|
|
|
debug_printf( "IN $%04X\n", addr );
|
|
return 0;
|
|
}
|
|
|
|
// Emulation
|
|
|
|
blargg_err_t Kss_Emu::run_clocks( blip_time_t& duration, int )
|
|
{
|
|
while ( time() < duration )
|
|
{
|
|
blip_time_t end = min( duration, next_play );
|
|
cpu::run( min( duration, next_play ) );
|
|
if ( r.pc == idle_addr )
|
|
set_time( end );
|
|
|
|
if ( time() >= next_play )
|
|
{
|
|
next_play += play_period;
|
|
if ( r.pc == idle_addr )
|
|
{
|
|
if ( !gain_updated )
|
|
{
|
|
gain_updated = true;
|
|
if ( scc_accessed )
|
|
update_gain();
|
|
}
|
|
|
|
ram [--r.sp] = idle_addr >> 8;
|
|
ram [--r.sp] = idle_addr & 0xFF;
|
|
r.pc = get_le16( header_.play_addr );
|
|
GME_FRAME_HOOK( this );
|
|
}
|
|
}
|
|
}
|
|
|
|
duration = time();
|
|
next_play -= duration;
|
|
check( next_play >= 0 );
|
|
adjust_time( -duration );
|
|
ay.end_frame( duration );
|
|
scc.end_frame( duration );
|
|
if ( sn )
|
|
sn->end_frame( duration );
|
|
|
|
return 0;
|
|
}
|