int
spec128_common_reset( int contention )
{
size_t i;
machine_current->ram.locked=0;
machine_current->ram.last_byte = 0;
machine_current->ram.current_page=0;
machine_current->ram.current_rom=0;
memory_current_screen = 5;
memory_screen_mask = 0xffff;
/* Odd pages contended on the 128K/+2; the loop is up to 16 to
ensure all of the Scorpion's 256Kb RAM is not contended */
for( i = 0; i < 16; i++ )
memory_ram_set_16k_contention( i, i & 1 ? contention : 0 );
/* 0x0000: ROM 0 */
memory_map_16k( 0x0000, memory_map_rom, 0 );
/* 0x4000: RAM 5 */
memory_map_16k( 0x4000, memory_map_ram, 5 );
/* 0x8000: RAM 2 */
memory_map_16k( 0x8000, memory_map_ram, 2 );
/* 0xc000: RAM 0 */
memory_map_16k( 0xc000, memory_map_ram, 0 );
return 0;
}
static int
spec16_reset( void )
{
int error;
error = machine_load_rom( 0, settings_current.rom_16,
settings_default.rom_16, 0x4000 );
if( error ) return error;
ensure_empty_mapping();
periph_clear();
machines_periph_48();
periph_update();
/* The one RAM page is contended */
memory_ram_set_16k_contention( 5, 1 );
memory_map_16k( 0x0000, memory_map_rom, 0 );
memory_map_16k( 0x4000, memory_map_ram, 5 );
memory_map_16k( 0x8000, empty_mapping, 0 );
memory_map_16k( 0xc000, empty_mapping, 0 );
memory_current_screen = 5;
memory_screen_mask = 0xffff;
spec48_common_display_setup();
return 0;
}
int
spec48_memory_map( void )
{
memory_map_16k( 0x0000, memory_map_rom, 0 );
memory_romcs_map();
return 0;
}
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;
}
/* Map 16K of memory and record default mapping for dock */
void
scld_home_map_16k( libspectrum_word address, memory_page source[],
int page_num )
{
int i;
memory_map_16k( address, source, page_num );
for( i = 0; i < MEMORY_PAGES_IN_16K; i++ ) {
int page = ( address >> MEMORY_PAGE_SIZE_LOGARITHM ) + i;
timex_home[ page ] = &source[ page_num * MEMORY_PAGES_IN_16K + i ];
}
}
void
spec128_select_page( int page )
{
memory_map_16k( 0xc000, memory_map_ram, page );
machine_current->ram.current_page = page;
}
void
spec128_select_rom( int rom )
{
memory_map_16k( 0x0000, memory_map_rom, rom );
machine_current->ram.current_rom = rom;
}