UINT8 c64_currah_speech_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
	if (!romh)
	{
		data = m_romh[offset & 0x1fff];
	}
	else if (!io1)
	{
		/*

		    bit     description

		    0
		    1
		    2
		    3
		    4
		    5
		    6
		    7       SBY

		*/

		data = m_nsp->sby_r() << 7;
	}

	if (!space.debugger_access() && (offset == 0xa7f0))
	{
		m_game = !m_game;
		m_exrom = !m_exrom;
	}

	return data;
}
示例#2
0
/* Read/Write common */
void psion_state::io_rw(address_space &space, UINT16 offset)
{
	if (space.debugger_access())
		return;

	switch (offset & 0xffc0)
	{
	case 0xc0:
		/* switch off, CPU goes into standby mode */
		m_enable_nmi = 0;
		m_stby_pwr = 1;
		space.machine().device<cpu_device>("maincpu")->suspend(SUSPEND_REASON_HALT, 1);
		break;
	case 0x100:
		m_pulse = 1;
		break;
	case 0x140:
		m_pulse = 0;
		break;
	case 0x200:
		m_kb_counter = 0;
		break;
	case 0x180:
		beep_set_state(m_beep, 1);
		break;
	case 0x1c0:
		beep_set_state(m_beep, 0);
		break;
	case 0x240:
		if (offset == 0x260 && (m_rom_bank_count || m_ram_bank_count))
		{
			m_ram_bank=0;
			m_rom_bank=0;
			update_banks(machine());
		}
		else
			m_kb_counter++;
		break;
	case 0x280:
		if (offset == 0x2a0 && m_ram_bank_count)
		{
			m_ram_bank++;
			update_banks(machine());
		}
		else
			m_enable_nmi = 1;
		break;
	case 0x2c0:
		if (offset == 0x2e0 && m_rom_bank_count)
		{
			m_rom_bank++;
			update_banks(machine());
		}
		else
			m_enable_nmi = 0;
		break;
	}
}
示例#3
0
UINT8 a2bus_pcxporter_device::read_c800(address_space &space, UINT16 offset)
{
//  printf("Read C800 at %x\n", offset + 0xc800);

	if (offset < 0x400)
	{
		return m_c800_ram[offset];
	}
	else
	{
		UINT8 rv;

		switch (offset)
		{
			case 0x700:
				return m_offset & 0xff;

			case 0x701:
				return (m_offset >> 8) & 0xff;

			case 0x702:
				return (m_offset >> 16) & 0xff;

			case 0x703: // read with increment
				rv = m_ram[m_offset];
				// don't increment if the debugger's reading
				if (!space.debugger_access())
				{
					m_offset++;
				}
				return rv;

			case 0x704: // read w/o increment
				rv = m_ram[m_offset];
				return rv;			
				
			default:
				//printf("Read $C800 at %x\n", offset + 0xc800);
				break;					
		}

		return m_regs[offset];
	}
}