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/* pentagon512.c: Pentagon 512K specific routines. This machine is expected to
be a post-1996 Pentagon (a 512k v1.x 1024SL?). It is
different to the Pentagon 128k model as we want to be able to
exchange snapshots with emulators that do not support this
model but do support the older style Pentagon (SPIN,
Spectaculator, xzx-pro etc. etc.)..
Copyright (c) 1999-2011 Philip Kendall and Fredrick Meunier
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 <libspectrum.h>
#include "compat.h"
#include "machine.h"
#include "machines.h"
#include "machines_periph.h"
#include "memory_pages.h"
#include "pentagon.h"
#include "periph.h"
#include "peripherals/disk/beta.h"
#include "settings.h"
#include "spec128.h"
#include "spec48.h"
static int pentagon_reset( void );
static int pentagon_memory_map( void );
int
pentagon512_init( fuse_machine_info *machine )
{
machine->machine = LIBSPECTRUM_MACHINE_PENT512;
machine->id = "pentagon512";
machine->reset = pentagon_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 = 32;
machine->unattached_port = spectrum_unattached_port_none;
machine->shutdown = NULL;
machine->memory_map = pentagon_memory_map;
return 0;
}
static int
pentagon_reset(void)
{
int error;
error = machine_load_rom( 0, settings_current.rom_pentagon512_0,
settings_default.rom_pentagon512_0, 0x4000 );
if( error ) return error;
error = machine_load_rom( 1, settings_current.rom_pentagon512_1,
settings_default.rom_pentagon512_1, 0x4000 );
if( error ) return error;
error = machine_load_rom( 2, settings_current.rom_pentagon512_3,
settings_default.rom_pentagon512_3, 0x4000 );
if( error ) return error;
error = machine_load_rom_bank( beta_memory_map_romcs, 0,
settings_current.rom_pentagon512_2,
settings_default.rom_pentagon512_2, 0x4000 );
if( error ) return error;
error = spec128_common_reset( 0 );
if( error ) return error;
periph_clear();
machines_periph_pentagon();
/* Earlier style Betadisk 128 interface */
periph_set_present( PERIPH_TYPE_BETA128_PENTAGON, PERIPH_PRESENT_ALWAYS );
periph_set_present( PERIPH_TYPE_COVOX_FB, PERIPH_PRESENT_OPTIONAL );
periph_update();
beta_builtin = 1;
beta_active = 1;
machine_current->ram.last_byte2 = 0;
machine_current->ram.special = 0;
spec48_common_display_setup();
return 0;
}
static int
pentagon_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( beta_active && !( machine_current->ram.last_byte & 0x10 ) ) {
rom = 2;
} else {
rom = ( machine_current->ram.last_byte & 0x10 ) >> 4;
}
machine_current->ram.current_rom = rom;
spec128_select_rom( rom );
page = machine_current->ram.last_byte & 0x07;
page += ( machine_current->ram.last_byte & 0xC0 ) >> 3;
spec128_select_page( page );
machine_current->ram.current_page = page;
memory_romcs_map();
return 0;
}
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