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/* spec48.c: Spectrum 48K specific routines
Copyright (c) 1999-2011 Philip Kendall
$Id: spec48.c 4638 2012-01-21 12:52:14Z 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 "machine.h"
#include "machines_periph.h"
#include "memory.h"
#include "periph.h"
#include "peripherals/disk/beta.h"
#include "settings.h"
#include "spec128.h"
#include "spec48.h"
#include "spectrum.h"
static int spec48_reset( void );
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->ram.valid_pages = 3;
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, settings_current.rom_48,
settings_default.rom_48, 0x4000 );
if( error ) return error;
periph_clear();
machines_periph_48();
periph_update();
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 )
{
/* 0x0000: ROM 0 */
memory_map_16k( 0x0000, memory_map_rom, 0 );
/* 0x4000: RAM 5, contended */
memory_ram_set_16k_contention( 5, 1 );
memory_map_16k( 0x4000, memory_map_ram, 5 );
/* 0x8000: RAM 2, not contended */
memory_ram_set_16k_contention( 2, 0 );
memory_map_16k( 0x8000, memory_map_ram, 2 );
/* 0xc000: RAM 0, not contended */
memory_ram_set_16k_contention( 0, 0 );
memory_map_16k( 0xc000, memory_map_ram, 0 );
return 0;
}
int
spec48_memory_map( void )
{
memory_map_16k( 0x0000, memory_map_rom, 0 );
memory_romcs_map();
return 0;
}
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