mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-22 22:05:38 +00:00
128 lines
2.9 KiB
C++
128 lines
2.9 KiB
C++
/**
|
|
** Supermodel
|
|
** A Sega Model 3 Arcade Emulator.
|
|
** Copyright 2011 Bart Trzynadlowski, Nik Henson
|
|
**
|
|
** This file is part of Supermodel.
|
|
**
|
|
** Supermodel is free software: you can redistribute it and/or modify it under
|
|
** the terms of the GNU General Public License as published by the Free
|
|
** Software Foundation, either version 3 of the License, or (at your option)
|
|
** any later version.
|
|
**
|
|
** Supermodel is distributed in the hope that it will be useful, but WITHOUT
|
|
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
** more details.
|
|
**
|
|
** You should have received a copy of the GNU General Public License along
|
|
** with Supermodel. If not, see <http://www.gnu.org/licenses/>.
|
|
**/
|
|
|
|
/*
|
|
* 93C46.h
|
|
*
|
|
* Header file defining the C93C46 class: 93C46 EEPROM.
|
|
*/
|
|
|
|
#ifndef INCLUDED_93C46_H
|
|
#define INCLUDED_93C46_H
|
|
|
|
|
|
/*
|
|
* C93C46:
|
|
*
|
|
* 93C46 serial EEPROM.
|
|
*/
|
|
class C93C46
|
|
{
|
|
public:
|
|
/*
|
|
* SaveState(SaveState):
|
|
*
|
|
* Saves an image of the current device state.
|
|
*
|
|
* Parameters:
|
|
* SaveState Block file to save state information to.
|
|
*/
|
|
void SaveState(CBlockFile *SaveState);
|
|
|
|
/*
|
|
* LoadState(SaveState):
|
|
*
|
|
* Loads and a state image.
|
|
*
|
|
* Parameters:
|
|
* SaveState Block file to load state information from.
|
|
*/
|
|
void LoadState(CBlockFile *SaveState);
|
|
|
|
/*
|
|
* Clear(void):
|
|
*
|
|
* Clears the EEPROM contents by writing all 1's.
|
|
*/
|
|
void Clear(void);
|
|
|
|
/*
|
|
* Write(pinCS, pinCLK, pinDI):
|
|
*
|
|
* Write to the EEPROM. All inputs must be either 0 or 1 only!
|
|
*
|
|
* Parameters:
|
|
* pinCS Chip select.
|
|
* pinCLK Serial data clock.
|
|
* pinDI Serial data input.
|
|
*/
|
|
void Write(unsigned pinCS, unsigned pinCLK, unsigned pinDI);
|
|
|
|
/*
|
|
* Read(void):
|
|
*
|
|
* Read from the EEPROM.
|
|
*
|
|
* Returns:
|
|
* The serial data output bit (either a 1 or 0).
|
|
*/
|
|
unsigned Read(void);
|
|
|
|
/*
|
|
* Reset(void):
|
|
*
|
|
* Resets the device, putting it into a locked state. Does not modify the
|
|
* memory.
|
|
*/
|
|
void Reset(void);
|
|
|
|
/*
|
|
* Init(void):
|
|
*
|
|
* One-time initialization of the context. Must be called prior to all
|
|
* other members.
|
|
*/
|
|
void Init(void);
|
|
|
|
/*
|
|
* C93C46(void):
|
|
* ~C93C46(void):
|
|
*
|
|
* Constructor and destructor.
|
|
*/
|
|
C93C46(void);
|
|
~C93C46(void);
|
|
|
|
private:
|
|
UINT16 regs[64]; // memory: 64 16-bit registers
|
|
unsigned CS, CLK, DI, DO; // pins
|
|
UINT32 bitBufferOut; // bits to be shifted out
|
|
UINT32 bitBufferIn; // stores bits as they are shifted in
|
|
int bitsOut; // how many bits have been shifted out
|
|
bool receiving; // if true, accepting data, if false, sending data out (read commands)
|
|
unsigned addr; // latched address
|
|
int busyCycles; // when > 0, counts down delay cycles and indicates busy
|
|
bool locked; // whether the EEPROM is in a locked state
|
|
};
|
|
|
|
|
|
#endif // INCLUDED_93C46_H
|