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Diffstat (limited to 'src/devices/machine/buffer.h')
-rw-r--r--src/devices/machine/buffer.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/src/devices/machine/buffer.h b/src/devices/machine/buffer.h
new file mode 100644
index 00000000000..cab1b9914f4
--- /dev/null
+++ b/src/devices/machine/buffer.h
@@ -0,0 +1,31 @@
+// license:BSD-3-Clause
+// copyright-holders:smf
+#ifndef __BUFFER_H__
+#define __BUFFER_H__
+
+class input_buffer_device : public device_t
+{
+public:
+ input_buffer_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ UINT8 read() { return m_input_data; }
+ DECLARE_READ8_MEMBER(read) { return read(); }
+
+ DECLARE_WRITE_LINE_MEMBER(write_bit0) { if (state) m_input_data |= 0x01; else m_input_data &= ~0x01; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit1) { if (state) m_input_data |= 0x02; else m_input_data &= ~0x02; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit2) { if (state) m_input_data |= 0x04; else m_input_data &= ~0x04; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit3) { if (state) m_input_data |= 0x08; else m_input_data &= ~0x08; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit4) { if (state) m_input_data |= 0x10; else m_input_data &= ~0x10; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit5) { if (state) m_input_data |= 0x20; else m_input_data &= ~0x20; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit6) { if (state) m_input_data |= 0x40; else m_input_data &= ~0x40; }
+ DECLARE_WRITE_LINE_MEMBER(write_bit7) { if (state) m_input_data |= 0x80; else m_input_data &= ~0x80; }
+
+protected:
+ virtual void device_start();
+
+ UINT8 m_input_data;
+};
+
+extern const device_type INPUT_BUFFER;
+
+#endif