mirror of
https://git.code.sf.net/p/fuse-emulator/fuse
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ba77c2ab67
To avoid clashes with any similarly named system files (thanks, BogDan Vatra and Sergio Baldoví).
129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/* spec48.c: Spectrum 48K specific routines
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Copyright (c) 1999-2011 Philip Kendall
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Author contact information:
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E-mail: philip-fuse@shadowmagic.org.uk
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*/
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#include <config.h>
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#include <stdio.h>
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#include <libspectrum.h>
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#include "machine.h"
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#include "machines_periph.h"
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#include "memory_pages.h"
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#include "periph.h"
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#include "peripherals/disk/beta.h"
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#include "settings.h"
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#include "spec128.h"
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#include "spec48.h"
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#include "spectrum.h"
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static int spec48_reset( void );
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int
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spec48_port_from_ula( libspectrum_word port )
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{
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/* All even ports supplied by ULA */
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return !( port & 0x0001 );
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}
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int spec48_init( fuse_machine_info *machine )
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{
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machine->machine = LIBSPECTRUM_MACHINE_48;
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machine->id = "48";
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machine->reset = spec48_reset;
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machine->timex = 0;
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machine->ram.port_from_ula = spec48_port_from_ula;
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machine->ram.contend_delay = spectrum_contend_delay_65432100;
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machine->ram.contend_delay_no_mreq = spectrum_contend_delay_65432100;
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machine->ram.valid_pages = 3;
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machine->unattached_port = spectrum_unattached_port;
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machine->shutdown = NULL;
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machine->memory_map = spec48_memory_map;
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return 0;
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}
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static int
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spec48_reset( void )
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{
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int error;
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error = machine_load_rom( 0, settings_current.rom_48,
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settings_default.rom_48, 0x4000 );
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if( error ) return error;
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periph_clear();
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machines_periph_48();
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periph_update();
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beta_builtin = 0;
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memory_current_screen = 5;
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memory_screen_mask = 0xffff;
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spec48_common_display_setup();
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return spec48_common_reset();
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}
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void
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spec48_common_display_setup( void )
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{
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display_dirty = display_dirty_sinclair;
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display_write_if_dirty = display_write_if_dirty_sinclair;
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display_dirty_flashing = display_dirty_flashing_sinclair;
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memory_display_dirty = memory_display_dirty_sinclair;
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}
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int
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spec48_common_reset( void )
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{
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/* 0x0000: ROM 0 */
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memory_map_16k( 0x0000, memory_map_rom, 0 );
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/* 0x4000: RAM 5, contended */
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memory_ram_set_16k_contention( 5, 1 );
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memory_map_16k( 0x4000, memory_map_ram, 5 );
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/* 0x8000: RAM 2, not contended */
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memory_ram_set_16k_contention( 2, 0 );
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memory_map_16k( 0x8000, memory_map_ram, 2 );
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/* 0xc000: RAM 0, not contended */
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memory_ram_set_16k_contention( 0, 0 );
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memory_map_16k( 0xc000, memory_map_ram, 0 );
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return 0;
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}
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int
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spec48_memory_map( void )
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{
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memory_map_16k( 0x0000, memory_map_rom, 0 );
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memory_romcs_map();
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return 0;
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}
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