summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/c64/turbo232.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/c64/turbo232.cpp')
-rw-r--r--src/devices/bus/c64/turbo232.cpp219
1 files changed, 219 insertions, 0 deletions
diff --git a/src/devices/bus/c64/turbo232.cpp b/src/devices/bus/c64/turbo232.cpp
new file mode 100644
index 00000000000..8fe00f65fd1
--- /dev/null
+++ b/src/devices/bus/c64/turbo232.cpp
@@ -0,0 +1,219 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ CMD Turbo232 RS-232 cartridge emulation
+
+**********************************************************************/
+
+/*
+
+ http://ar.c64.org/wiki/Turbo232_Programming.txt
+
+*/
+
+#include "turbo232.h"
+
+
+
+//**************************************************************************
+// MACROS/CONSTANTS
+//**************************************************************************
+
+#define MOS6551_TAG "mos6551"
+#define RS232_TAG "rs232"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_TURBO232 = &device_creator<c64_turbo232_cartridge_device>;
+
+
+//-------------------------------------------------
+// MACHINE_CONFIG_FRAGMENT( c64_turbo232 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( c64_turbo232 )
+ MCFG_DEVICE_ADD(MOS6551_TAG, MOS6551, 0)
+ MCFG_MOS6551_XTAL(XTAL_3_6864MHz)
+ MCFG_MOS6551_IRQ_HANDLER(WRITELINE(c64_turbo232_cartridge_device, acia_irq_w))
+ MCFG_MOS6551_TXD_HANDLER(DEVWRITELINE(RS232_TAG, rs232_port_device, write_txd))
+
+ MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, NULL)
+ MCFG_RS232_RXD_HANDLER(DEVWRITELINE(MOS6551_TAG, mos6551_device, write_rxd))
+ MCFG_RS232_DCD_HANDLER(DEVWRITELINE(MOS6551_TAG, mos6551_device, write_dcd))
+ MCFG_RS232_DSR_HANDLER(DEVWRITELINE(MOS6551_TAG, mos6551_device, write_dsr))
+ MCFG_RS232_CTS_HANDLER(DEVWRITELINE(MOS6551_TAG, mos6551_device, write_cts))
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor c64_turbo232_cartridge_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( c64_turbo232 );
+}
+
+
+//-------------------------------------------------
+// INPUT_PORTS( c64_turbo232 )
+//-------------------------------------------------
+
+static INPUT_PORTS_START( c64_turbo232 )
+ PORT_START("CS")
+ PORT_DIPNAME( 0x03, 0x01, "Base Address" )
+ PORT_DIPSETTING( 0x00, "$D700 (C128)" )
+ PORT_DIPSETTING( 0x01, "$DE00" )
+ PORT_DIPSETTING( 0x02, "$DF00" )
+
+ PORT_START("IRQ")
+ PORT_DIPNAME( 0x01, 0x01, "Interrupt" )
+ PORT_DIPSETTING( 0x00, "IRQ" )
+ PORT_DIPSETTING( 0x01, "NMI" )
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor c64_turbo232_cartridge_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( c64_turbo232 );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_turbo232_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_turbo232_cartridge_device::c64_turbo232_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_TURBO232, "C64 Turbo232 cartridge", tag, owner, clock, "c64_turbo232", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this),
+ m_acia(*this, MOS6551_TAG),
+ m_rs232(*this, RS232_TAG),
+ m_io_cs(*this, "CS"),
+ m_io_irq(*this, "IRQ")
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_turbo232_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void c64_turbo232_cartridge_device::device_reset()
+{
+ m_acia->reset();
+
+ m_cs = m_io_cs->read();
+ m_irq = m_io_irq->read();
+
+ m_es = 0;
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_turbo232_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 (((m_cs == DE00) && !io1) || ((m_cs == DF00) && !io2) ||
+ ((m_cs == D700) && ((offset & 0xff00) == 0xd700)))
+ {
+ if (!(offset & 0xe0))
+ {
+ switch (offset & 0x07)
+ {
+ case 0: case 1: case 2: case 3:
+ data = m_acia->read(space, offset & 0x03);
+ break;
+
+ case 7:
+ data = m_es;
+ }
+ }
+ }
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// c64_cd_w - cartridge data write
+//-------------------------------------------------
+
+void c64_turbo232_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
+{
+ if (((m_cs == DE00) && !io1) || ((m_cs == DF00) && !io2) ||
+ ((m_cs == D700) && ((offset & 0xff00) == 0xd700)))
+ {
+ if (!(offset & 0xe0))
+ {
+ switch (offset & 0x07)
+ {
+ case 0: case 1: case 2:
+ m_acia->write(space, offset & 0x03, data);
+ break;
+
+ case 3:
+ m_acia->write(space, offset & 0x03, data);
+
+ if (data & 0x0f)
+ m_es &= ~ES_M;
+ else
+ m_es |= ES_M;
+ break;
+
+ case 7:
+ if (m_es & ES_M)
+ {
+ data = m_es;
+
+ switch (m_es & ES_S_MASK)
+ {
+ case ES_S_230400: m_acia->set_xtal(XTAL_3_6864MHz); break;
+ case ES_S_115200: m_acia->set_xtal(XTAL_3_6864MHz/2); break;
+ case ES_S_57600: m_acia->set_xtal(XTAL_3_6864MHz/4); break;
+ case ES_S_UNDEFINED: m_acia->set_xtal(0); break;
+ }
+ }
+ }
+ }
+ }
+}
+
+
+//-------------------------------------------------
+// acia_irq_w -
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( c64_turbo232_cartridge_device::acia_irq_w )
+{
+ switch (m_irq)
+ {
+ case IRQ: m_slot->irq_w(state); break;
+ case NMI: m_slot->nmi_w(state); break;
+ }
+}