openMSX
MSXHBI55.hh
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1#ifndef MSXHBI55_HH
2#define MSXHBI55_HH
3
4#include "MSXDevice.hh"
5#include "I8255Interface.hh"
6#include "I8255.hh"
7#include "SRAM.hh"
8#include "serialize_meta.hh"
9
10namespace openmsx {
11
12class MSXHBI55 final : public MSXDevice, public I8255Interface
13{
14public:
15 explicit MSXHBI55(const DeviceConfig& config);
16
17 void reset(EmuTime::param time) override;
18 [[nodiscard]] byte readIO(word port, EmuTime::param time) override;
19 [[nodiscard]] byte peekIO(word port, EmuTime::param time) const override;
20 void writeIO(word port, byte value, EmuTime::param time) override;
21
22 template<typename Archive>
23 void serialize(Archive& ar, unsigned version);
24
25private:
26 // I8255Interface
27 [[nodiscard]] byte readA(EmuTime::param time) override;
28 [[nodiscard]] byte readB(EmuTime::param time) override;
29 [[nodiscard]] nibble readC0(EmuTime::param time) override;
30 [[nodiscard]] nibble readC1(EmuTime::param time) override;
31 [[nodiscard]] byte peekA(EmuTime::param time) const override;
32 [[nodiscard]] byte peekB(EmuTime::param time) const override;
33 [[nodiscard]] nibble peekC0(EmuTime::param time) const override;
34 [[nodiscard]] nibble peekC1(EmuTime::param time) const override;
35 void writeA(byte value, EmuTime::param time) override;
36 void writeB(byte value, EmuTime::param time) override;
37 void writeC0(nibble value, EmuTime::param time) override;
38 void writeC1(nibble value, EmuTime::param time) override;
39
40 void writeStuff();
41 byte readStuff() const;
42
43private:
44 I8255 i8255;
45 SRAM sram;
46 byte lastC; // hack to approach a 'floating value'
47};
49
50} // namespace openmsx
51
52#endif
An MSXDevice is an emulated hardware component connected to the bus of the emulated MSX.
Definition: MSXDevice.hh:34
void reset(EmuTime::param time) override
This method is called on reset.
Definition: MSXHBI55.cc:75
byte peekIO(word port, EmuTime::param time) const override
Read a byte from a given IO port.
Definition: MSXHBI55.cc:86
byte readIO(word port, EmuTime::param time) override
Read a byte from an IO port at a certain time from this device.
Definition: MSXHBI55.cc:81
void writeIO(word port, byte value, EmuTime::param time) override
Write a byte to a given IO port at a certain time to this device.
Definition: MSXHBI55.cc:91
void serialize(Archive &ar, unsigned version)
Definition: MSXHBI55.cc:205
MSXHBI55(const DeviceConfig &config)
Definition: MSXHBI55.cc:67
This file implemented 3 utility functions:
Definition: Autofire.cc:9
uint8_t nibble
4 bit integer
Definition: openmsx.hh:23
uint16_t word
16 bit unsigned integer
Definition: openmsx.hh:29
SERIALIZE_CLASS_VERSION(CassettePlayer, 2)