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-rw-r--r--src/devices/bus/msx/ctrl/ctrl.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/devices/bus/msx/ctrl/ctrl.h b/src/devices/bus/msx/ctrl/ctrl.h
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+++ b/src/devices/bus/msx/ctrl/ctrl.h
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+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+/**********************************************************************
+
+ MSX General Purpose port emulation
+
+The MSX General Purpose port uses a DE-9 connector; the pin assignment
+is similar to but slightly different from the Atari VCS controller port.
+
+**********************************************************************/
+
+#ifndef MAME_BUS_MSX_CTRL_CTRL_H
+#define MAME_BUS_MSX_CTRL_CTRL_H
+
+#pragma once
+
+
+class msx_general_purpose_port_device;
+
+
+class device_msx_general_purpose_port_interface : public device_interface
+{
+public:
+ virtual ~device_msx_general_purpose_port_interface() { }
+
+ virtual u8 read() { return 0xff; }
+ virtual void pin_6_w(int state) { }
+ virtual void pin_7_w(int state) { }
+ virtual void pin_8_w(int state) { }
+
+protected:
+ device_msx_general_purpose_port_interface(const machine_config &mconfig, device_t &device);
+
+ msx_general_purpose_port_device *m_port;
+};
+
+
+class msx_general_purpose_port_device : public device_t
+ , public device_single_card_slot_interface<device_msx_general_purpose_port_interface>
+{
+public:
+ template <typename T>
+ msx_general_purpose_port_device(const machine_config &mconfig, const char *tag, device_t *owner, T &&opts, char const* dflt)
+ : msx_general_purpose_port_device(mconfig, tag, owner)
+ {
+ option_reset();
+ opts(*this);
+ set_default_option(dflt);
+ set_fixed(false);
+ }
+ msx_general_purpose_port_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
+
+ // computer interface
+ //
+ // Data returned by the read method:
+ // bit 0 - pin 1 - Up (I)
+ // bit 1 - pin 2 - Down (I)
+ // bit 2 - pin 3 - Left (I)
+ // bit 3 - pin 4 - Right (I)
+ // pin 5 - +5V
+ // bit 4 - pin 6 - Button 1 (I/O)
+ // bit 5 - pin 7 - Button 2 (I/O)
+ // bit 6 - pin 8 - Strobe (O for MSX, I/O for FM Towns)
+ // pin 9 - GND
+ //
+ u8 read() { return exists() ? m_device->read() : 0xff; }
+
+ void pin_6_w(int state) { if (exists()) m_device->pin_6_w(state); }
+ void pin_7_w(int state) { if (exists()) m_device->pin_7_w(state); }
+ void pin_8_w(int state) { if (exists()) m_device->pin_8_w(state); }
+
+ bool exists() const { return m_device != nullptr; }
+
+protected:
+ virtual void device_start() override ATTR_COLD;
+
+ device_msx_general_purpose_port_interface *m_device;
+};
+
+
+DECLARE_DEVICE_TYPE(MSX_GENERAL_PURPOSE_PORT, msx_general_purpose_port_device)
+
+void msx_general_purpose_port_devices(device_slot_interface &device);
+
+#endif // MAME_BUS_MSX_CTRL_CTRL_H