86 lines
2.3 KiB
C++
86 lines
2.3 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 WDC816_H
|
|
#define WDC816_H
|
|
|
|
#ifdef CHIPKIT
|
|
# define INLINE inline
|
|
#else
|
|
# define INLINE inline
|
|
#endif
|
|
|
|
// The wdc816 class defines common types for 8-, 16- and 24-bit data values and
|
|
// a set of common functions for manipulating them.
|
|
|
|
class wdc816
|
|
{
|
|
public:
|
|
// Common types for memory and register sizes
|
|
typedef unsigned char Bit;
|
|
typedef unsigned char Byte;
|
|
typedef unsigned short Word;
|
|
typedef unsigned long Addr;
|
|
|
|
// Convert a value to a hex string.
|
|
static char *toHex(unsigned long value, unsigned int digits);
|
|
|
|
// Return the low byte of a word
|
|
INLINE static Byte lo(Word value)
|
|
{
|
|
return ((Byte) value);
|
|
}
|
|
|
|
// Return the high byte of a word
|
|
INLINE static Byte hi(Word value)
|
|
{
|
|
return (lo(value >> 8));
|
|
}
|
|
|
|
// Convert the bank number into a address
|
|
INLINE static Addr bank(Byte b)
|
|
{
|
|
return (b << 16);
|
|
}
|
|
|
|
// Combine two bytes into a word
|
|
INLINE static Word join(Byte l, Byte h)
|
|
{
|
|
return (l | (h << 8));
|
|
}
|
|
|
|
// Combine a bank and an word into an address
|
|
INLINE static Addr join(Byte b, Word a)
|
|
{
|
|
return (bank(b) | a);
|
|
}
|
|
|
|
// Swap the high and low bytes of a word
|
|
INLINE static Word swap(Word value)
|
|
{
|
|
return ((value >> 8) | (value << 8));
|
|
}
|
|
|
|
protected:
|
|
wdc816();
|
|
~wdc816();
|
|
};
|
|
#endif |