static WRITE8_HANDLER(pcat_nit_rombank_w)
{
logerror( "rom bank #%02x at PC=%08X\n", data, cpu_get_pc(space->cpu) );
if ( data & 0x40 )
{
// rom bank
memory_install_read_bank(space, 0x000d8000, 0x000dffff, 0, 0, "rombank" );
memory_unmap_write(space, 0x000d8000, 0x000dffff, 0, 0);
if ( data & 0x80 )
{
memory_set_bank(space->machine, "rombank", (data & 0x3f) | 0x40 );
}
else
{
memory_set_bank(space->machine, "rombank", data & 0x3f );
}
}
else
{
// nvram bank
memory_unmap_read(space, 0x000d8000, 0x000dffff, 0, 0);
memory_unmap_write(space, 0x000d8000, 0x000dffff, 0, 0);
memory_install_read_bank(space, 0x000d8000, 0x000d9fff, 0, 0, "nvrambank" );
memory_install_write_bank(space, 0x000d8000, 0x000d9fff, 0, 0, "nvrambank" );
memory_set_bankptr(space->machine, "nvrambank", space->machine->generic.nvram.u8);
}
}
static WRITE8_DEVICE_HANDLER( arcadia_cia_0_porta_w )
{
/* switch banks as appropriate */
memory_set_bank(device->machine, "bank1", data & 1);
/* swap the write handlers between ROM and bank 1 based on the bit */
if ((data & 1) == 0)
/* overlay disabled, map RAM on 0x000000 */
memory_install_write_bank(cputag_get_address_space(device->machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x000000, 0x07ffff, 0, 0, "bank1");
else
/* overlay enabled, map Amiga system ROM on 0x000000 */
memory_unmap_write(cputag_get_address_space(device->machine, "maincpu", ADDRESS_SPACE_PROGRAM), 0x000000, 0x07ffff, 0, 0);
/* bit 2 = Power Led on Amiga */
set_led_status(device->machine, 0, (data & 2) ? 0 : 1);
}
static void update_memory_mapping(running_machine *machine, struct memory_mapper_chip *chip, int decrypt)
{
int rgnum;
if (LOG_MEMORY_MAP) mame_printf_debug("----\nRemapping:\n");
/* first reset everything back to the beginning */
memory_install_readwrite16_handler(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), 0x000000, 0xffffff, 0, 0, segaic16_memory_mapper_lsb_r, segaic16_memory_mapper_lsb_w);
/* loop over the regions */
for (rgnum = 0; chip->map[rgnum].regbase != 0; rgnum++)
{
static const offs_t region_size_map[4] = { 0x00ffff, 0x01ffff, 0x07ffff, 0x1fffff };
const segaic16_memory_map_entry *rgn = &chip->map[rgnum];
offs_t region_size = region_size_map[chip->regs[rgn->regbase] & 3];
offs_t region_base = (chip->regs[rgn->regbase + 1] << 16) & ~region_size;
offs_t region_mirror = rgn->mirror & region_size;
offs_t region_start = region_base + (rgn->regoffs & region_size);
offs_t region_end = region_start + ((rgn->length - 1 < region_size) ? rgn->length - 1 : region_size);
const char *writebank = rgn->writebank;
write16_space_func write = rgn->write;
const char *readbank = rgn->readbank;
read16_space_func read = rgn->read;
/* ROM areas need extra clamping */
if (rgn->romoffset != ~0)
{
offs_t romsize = chip->cpu->region()->bytes();
if (region_start >= romsize)
read = NULL;
else if (region_start + rgn->length > romsize)
region_end = romsize - 1;
}
/* map it */
if (read != NULL)
memory_install_read16_handler(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, read);
else if (readbank != NULL)
memory_install_read_bank(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, readbank);
if (write != NULL)
memory_install_write16_handler(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, write);
else if (writebank != NULL)
memory_install_write_bank(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, writebank);
/* set the bank pointer */
if (readbank != NULL)
{
if (rgn->base != NULL)
{
memory_configure_bank(machine, readbank, 0, 1, *rgn->base, 0);
memory_set_bank(machine, readbank, 0);
}
else if (rgn->romoffset != ~0)
{
UINT8 *decrypted = NULL;
if (decrypt)
{
decrypted = (UINT8 *)fd1094_get_decrypted_base();
if (!decrypted)
decrypted = (UINT8 *)fd1089_get_decrypted_base();
}
memory_configure_bank(machine, readbank, 0, 1, chip->cpu->region()->base() + region_start, 0);
if (decrypted)
memory_configure_bank_decrypted(machine, readbank, 0, 1, decrypted + region_start, 0);
memory_set_bank(machine, readbank, 0);
}
}
if (LOG_MEMORY_MAP) mame_printf_debug(" %06X-%06X (%06X) = %s\n", region_start, region_end, region_mirror, rgn->name);
}
}
