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/* scorpion.c: Scorpion 256K specific routines
Copyright (c) 1999-2011 Philip Kendall, Fredrick Meunier and Stuart Brady
$Id: scorpion.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 <unistd.h>
#include <libspectrum.h>
#include "compat.h"
#include "machine.h"
#include "machines.h"
#include "machines_periph.h"
#include "memory.h"
#include "pentagon.h"
#include "peripherals/disk/beta.h"
#include "settings.h"
#include "scorpion.h"
#include "spec128.h"
#include "spec48.h"
#include "specplus3.h"
#include "spectrum.h"
static int scorpion_reset( void );
static int scorpion_memory_map( void );
int
scorpion_init( fuse_machine_info *machine )
{
machine->machine = LIBSPECTRUM_MACHINE_SCORP;
machine->id = "scorpion";
machine->reset = scorpion_reset;
machine->timex = 0;
machine->ram.port_from_ula = pentagon_port_from_ula;
machine->ram.contend_delay = spectrum_contend_delay_none;
machine->ram.contend_delay_no_mreq = spectrum_contend_delay_none;
machine->ram.valid_pages = 16;
machine->unattached_port = spectrum_unattached_port_none;
machine->shutdown = NULL;
machine->memory_map = scorpion_memory_map;
return 0;
}
int
scorpion_reset(void)
{
int error;
error = machine_load_rom( 0, settings_current.rom_scorpion_0,
settings_default.rom_scorpion_0, 0x4000 );
if( error ) return error;
error = machine_load_rom( 1, settings_current.rom_scorpion_1,
settings_default.rom_scorpion_1, 0x4000 );
if( error ) return error;
error = machine_load_rom( 2, settings_current.rom_scorpion_2,
settings_default.rom_scorpion_2, 0x4000 );
if( error ) return error;
error = machine_load_rom_bank( beta_memory_map_romcs, 0,
settings_current.rom_scorpion_3,
settings_default.rom_scorpion_3, 0x4000 );
if( error ) return error;
error = spec128_common_reset( 0 );
if( error ) return error;
machine_current->ram.last_byte2 = 0;
machine_current->ram.special = 0;
periph_clear();
machines_periph_pentagon();
/* +3-style memory paging */
periph_set_present( PERIPH_TYPE_128_MEMORY, PERIPH_PRESENT_NEVER );
periph_set_present( PERIPH_TYPE_PLUS3_MEMORY, PERIPH_PRESENT_ALWAYS );
/* Later style Betadisk 128 interface */
periph_set_present( PERIPH_TYPE_BETA128_PENTAGON_LATE, PERIPH_PRESENT_ALWAYS );
periph_update();
beta_builtin = 1;
beta_active = 0;
spec48_common_display_setup();
return 0;
}
static int
scorpion_memory_map( void )
{
int rom, page, screen;
screen = ( machine_current->ram.last_byte & 0x08 ) ? 7 : 5;
if( memory_current_screen != screen ) {
display_update_critical( 0, 0 );
display_refresh_main_screen();
memory_current_screen = screen;
}
if( machine_current->ram.last_byte2 & 0x02 ) {
rom = 2;
} else {
rom = ( machine_current->ram.last_byte & 0x10 ) >> 4;
}
machine_current->ram.current_rom = rom;
if( machine_current->ram.last_byte2 & 0x01 ) {
memory_map_16k( 0x0000, memory_map_ram, 0 );
machine_current->ram.special = 1;
} else {
spec128_select_rom( rom );
}
page = ( ( machine_current->ram.last_byte2 & 0x10 ) >> 1 ) |
( machine_current->ram.last_byte & 0x07 );
spec128_select_page( page );
machine_current->ram.current_page = page;
memory_romcs_map();
return 0;
}
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