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/* spec48.c: Spectrum 48K specific routines
Copyright (c) 1999-2009 Philip Kendall
$Id: spec48.c 4060 2009-07-30 13:21:38Z fredm $
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include <config.h>
#include <stdio.h>
#include <libspectrum.h>
#include "disk/beta.h"
#include "joystick.h"
#include "machine.h"
#include "memory.h"
#include "periph.h"
#include "printer.h"
#include "settings.h"
#include "spec48.h"
#include "spectrum.h"
#include "ula.h"
#include "if1.h"
static int spec48_reset( void );
static const periph_t peripherals[] = {
{ 0x0001, 0x0000, ula_read, ula_write },
{ 0x0004, 0x0000, printer_zxp_read, printer_zxp_write },
{ 0x00e0, 0x0000, joystick_kempston_read, NULL },
};
static const size_t peripherals_count =
sizeof( peripherals ) / sizeof( periph_t );
int
spec48_port_from_ula( libspectrum_word port )
{
/* All even ports supplied by ULA */
return !( port & 0x0001 );
}
int spec48_init( fuse_machine_info *machine )
{
machine->machine = LIBSPECTRUM_MACHINE_48;
machine->id = "48";
machine->reset = spec48_reset;
machine->timex = 0;
machine->ram.port_from_ula = spec48_port_from_ula;
machine->ram.contend_delay = spectrum_contend_delay_65432100;
machine->ram.contend_delay_no_mreq = spectrum_contend_delay_65432100;
machine->unattached_port = spectrum_unattached_port;
machine->shutdown = NULL;
machine->memory_map = spec48_memory_map;
return 0;
}
static int
spec48_reset( void )
{
int error;
error = machine_load_rom( 0, 0, settings_current.rom_48,
settings_default.rom_48, 0x4000 );
if( error ) return error;
error = periph_setup( peripherals, peripherals_count );
if( error ) return error;
periph_setup_kempston( PERIPH_PRESENT_OPTIONAL );
periph_setup_interface1( PERIPH_PRESENT_OPTIONAL );
periph_setup_interface2( PERIPH_PRESENT_OPTIONAL );
periph_setup_opus( PERIPH_PRESENT_OPTIONAL );
periph_setup_plusd( PERIPH_PRESENT_OPTIONAL );
periph_setup_beta128( PERIPH_PRESENT_OPTIONAL );
periph_setup_fuller( PERIPH_PRESENT_OPTIONAL );
periph_setup_melodik( PERIPH_PRESENT_OPTIONAL );
periph_update();
periph_register_beta128();
beta_builtin = 0;
memory_current_screen = 5;
memory_screen_mask = 0xffff;
spec48_common_display_setup();
return spec48_common_reset();
}
void
spec48_common_display_setup( void )
{
display_dirty = display_dirty_sinclair;
display_write_if_dirty = display_write_if_dirty_sinclair;
display_dirty_flashing = display_dirty_flashing_sinclair;
memory_display_dirty = memory_display_dirty_sinclair;
}
int
spec48_common_reset( void )
{
size_t i;
/* ROM 0, RAM 5, RAM 2, RAM 0 */
memory_map_home[0] = &memory_map_rom[ 0];
memory_map_home[1] = &memory_map_rom[ 1];
memory_map_home[2] = &memory_map_ram[10];
memory_map_home[3] = &memory_map_ram[11];
memory_map_home[4] = &memory_map_ram[ 4];
memory_map_home[5] = &memory_map_ram[ 5];
memory_map_home[6] = &memory_map_ram[ 0];
memory_map_home[7] = &memory_map_ram[ 1];
/* 0x4000 - 0x7fff contended */
memory_map_home[2]->contended = memory_map_home[3]->contended = 1;
/* 0x8000 - 0xffff not contended */
memory_map_home[ 4]->contended = memory_map_home[ 5]->contended = 0;
memory_map_home[ 6]->contended = memory_map_home[ 7]->contended = 0;
/* Mark as present/writeable */
for( i = 2; i < 8; ++i )
memory_map_home[i]->writable = 1;
for( i = 0; i < 8; i++ )
memory_map_read[i] = memory_map_write[i] = *memory_map_home[i];
return 0;
}
int
spec48_memory_map( void )
{
/* By default, 0x0000 to 0x3fff come from the home bank */
memory_map_read[0] = memory_map_write[0] = *memory_map_home[0];
memory_map_read[1] = memory_map_write[1] = *memory_map_home[1];
memory_romcs_map();
return 0;
}
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