// license:BSD-3-Clause // copyright-holders:smf #ifndef MAME_MACHINE_BUFFER_H #define MAME_MACHINE_BUFFER_H #pragma once class input_buffer_device : public device_t { public: input_buffer_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); uint8_t read() { return m_input_data; } void write_bit0(int state) { if (state) m_input_data |= 0x01; else m_input_data &= ~0x01; } void write_bit1(int state) { if (state) m_input_data |= 0x02; else m_input_data &= ~0x02; } void write_bit2(int state) { if (state) m_input_data |= 0x04; else m_input_data &= ~0x04; } void write_bit3(int state) { if (state) m_input_data |= 0x08; else m_input_data &= ~0x08; } void write_bit4(int state) { if (state) m_input_data |= 0x10; else m_input_data &= ~0x10; } void write_bit5(int state) { if (state) m_input_data |= 0x20; else m_input_data &= ~0x20; } void write_bit6(int state) { if (state) m_input_data |= 0x40; else m_input_data &= ~0x40; } void write_bit7(int state) { if (state) m_input_data |= 0x80; else m_input_data &= ~0x80; } protected: virtual void device_start() override ATTR_COLD; uint8_t m_input_data; }; DECLARE_DEVICE_TYPE(INPUT_BUFFER, input_buffer_device) #endif // MAME_MACHINE_BUFFER_H