blob: d1f9684665f85fd59bb3362622ec8edec7889398 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
// 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
|