mirror of
https://github.com/andrew-jacobs/emu816.git
synced 2024-06-08 07:29:35 +00:00
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
//==============================================================================
|
|
// .ooooo. .o .ooo
|
|
// d88' `8. o888 .88'
|
|
// .ooooo. ooo. .oo. .oo. oooo oooo Y88.. .8' 888 d88'
|
|
// d88' `88b `888P"Y88bP"Y88b `888 `888 `88888b. 888 d888P"Ybo.
|
|
// 888ooo888 888 888 888 888 888 .8' ``88b 888 Y88[ ]88
|
|
// 888 .o 888 888 888 888 888 `8. .88P 888 `Y88 88P
|
|
// `Y8bod8P' o888o o888o o888o `V88V"V8P' `boood8' o888o `88bod8'
|
|
//
|
|
// A Portable C++ WDC 65C816 Emulator
|
|
//------------------------------------------------------------------------------
|
|
// Copyright (C)2016 Andrew John Jacobs
|
|
// All rights reserved.
|
|
//
|
|
// This work is made available under the terms of the Creative Commons
|
|
// Attribution-NonCommercial-ShareAlike 4.0 International license. Open the
|
|
// following URL to see the details.
|
|
//
|
|
// http://creativecommons.org/licenses/by-nc-sa/4.0/
|
|
//------------------------------------------------------------------------------
|
|
|
|
#ifndef MEM816_H
|
|
#define MEM816_H
|
|
|
|
#include "wdc816.h"
|
|
|
|
class mem816 :
|
|
public wdc816
|
|
{
|
|
public:
|
|
mem816(Addr memMask, Addr ramSize, const Byte *pROM);
|
|
mem816(Addr memMask, Addr ramSize, Byte *pRAM, const Byte *pROM);
|
|
~mem816();
|
|
|
|
INLINE Byte getByte(Addr ea)
|
|
{
|
|
if ((ea &= memMask) < ramSize)
|
|
return (pRAM[ea]);
|
|
|
|
return (pROM[ea - ramSize]);
|
|
}
|
|
|
|
INLINE Word getWord(Addr ea)
|
|
{
|
|
return (join(getByte(ea + 0), getByte(ea + 1)));
|
|
}
|
|
|
|
INLINE Addr getAddr(Addr ea)
|
|
{
|
|
return (join(getByte(ea + 2), getWord(ea + 0)));
|
|
}
|
|
|
|
INLINE void setByte(Addr ea, Byte data)
|
|
{
|
|
if ((ea &= memMask) < ramSize)
|
|
pRAM[ea] = data;
|
|
}
|
|
|
|
INLINE void setWord(Addr ea, Word data)
|
|
{
|
|
setByte(ea + 0, lo(data));
|
|
setByte(ea + 1, hi(data));
|
|
}
|
|
|
|
private:
|
|
const Addr memMask;
|
|
const Addr ramSize;
|
|
|
|
Byte *pRAM;
|
|
const Byte *pROM;
|
|
|
|
const bool freeRAM;
|
|
};
|
|
#endif
|