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/* pentagon.c: Pentagon 128K specific routines, this is intended to be a 1991
era Pentagon machine with Beta 128 and AY as described in the
Russian Speccy FAQ and emulated on most Spectrum emulators.
Copyright (c) 1999-2012 Philip Kendall and Fredrick Meunier
$Id: pentagon.c 4737 2012-09-28 13:15:27Z 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 <libspectrum.h>
#include "compat.h"
#include "machine.h"
#include "machines.h"
#include "machines_periph.h"
#include "memory.h"
#include "module.h"
#include "pentagon.h"
#include "periph.h"
#include "peripherals/disk/beta.h"
#include "peripherals/joystick.h"
#include "settings.h"
#include "spec48.h"
#include "spec128.h"
static void pentagon_from_snapshot( libspectrum_snap *snap );
static module_info_t pentagon_module_info = {
NULL,
NULL,
NULL,
pentagon_from_snapshot,
NULL,
};
static int pentagon_reset( void );
libspectrum_byte
pentagon_select_1f_read( libspectrum_word port, int *attached )
{
libspectrum_byte data;
int tmpattached = 0;
data = beta_sr_read( port, &tmpattached );
if( !tmpattached && settings_current.joy_kempston )
data = joystick_kempston_read( port, &tmpattached );
if( tmpattached ) {
*attached = 1;
return data;
}
return 0xff;
}
libspectrum_byte
pentagon_select_ff_read( libspectrum_word port, int *attached )
{
libspectrum_byte data;
int tmpattached = 0;
data = beta_sp_read( port, &tmpattached );
if( !tmpattached )
data = spectrum_unattached_port();
*attached = 1;
return data;
}
int
pentagon_port_from_ula( libspectrum_word port GCC_UNUSED )
{
/* No contended ports */
return 0;
}
int
pentagon_init( fuse_machine_info *machine )
{
machine->machine = LIBSPECTRUM_MACHINE_PENT;
machine->id = "pentagon";
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 = 8;
machine->unattached_port = spectrum_unattached_port_none;
machine->shutdown = NULL;
machine->memory_map = spec128_memory_map;
module_register( &pentagon_module_info );
return 0;
}
static int
pentagon_reset(void)
{
int error;
error = machine_load_rom( 0, settings_current.rom_pentagon_0,
settings_default.rom_pentagon_0, 0x4000 );
if( error ) return error;
error = machine_load_rom( 1, settings_current.rom_pentagon_1,
settings_default.rom_pentagon_1, 0x4000 );
if( error ) return error;
error = machine_load_rom_bank( beta_memory_map_romcs, 0,
settings_current.rom_pentagon_2,
settings_default.rom_pentagon_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_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 void
pentagon_from_snapshot( libspectrum_snap *snap )
{
/* During init we set beta_active to true unconditionally to bootstrap into
the TR-DOS ROM, but during snapshot loading we should repect the paging
setting from the snapshot itself */
if( periph_is_active( PERIPH_TYPE_BETA128_PENTAGON ) ||
periph_is_active( PERIPH_TYPE_BETA128_PENTAGON_LATE ) ) {
if( libspectrum_snap_beta_paged( snap ) ) {
beta_page();
} else {
beta_unpage();
}
}
}
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