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84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
//==============================================================================
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// .ooooo. .o .ooo
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// d88' `8. o888 .88'
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// .ooooo. ooo. .oo. .oo. oooo oooo Y88.. .8' 888 d88'
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// d88' `88b `888P"Y88bP"Y88b `888 `888 `88888b. 888 d888P"Ybo.
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// 888ooo888 888 888 888 888 888 .8' ``88b 888 Y88[ ]88
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// 888 .o 888 888 888 888 888 `8. .88P 888 `Y88 88P
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// `Y8bod8P' o888o o888o o888o `V88V"V8P' `boood8' o888o `88bod8'
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//
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// A Portable C++ WDC 65C816 Emulator
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//------------------------------------------------------------------------------
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// Copyright (C)2016 Andrew John Jacobs
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// All rights reserved.
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//
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// This work is made available under the terms of the Creative Commons
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// Attribution-NonCommercial-ShareAlike 4.0 International license. Open the
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// following URL to see the details.
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//
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// http://creativecommons.org/licenses/by-nc-sa/4.0/
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//------------------------------------------------------------------------------
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#ifndef WDC816_H
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#define WDC816_H
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//#define CHIPKIT
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#ifdef CHIPKIT
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# define INLINE inline
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#else
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# define INLINE inline
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#endif
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class wdc816
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{
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public:
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// Common types for memory and register sizes
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typedef unsigned char Bit;
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typedef unsigned char Byte;
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typedef unsigned short Word;
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typedef unsigned long Addr;
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wdc816 ();
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~wdc816();
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// Convert a value to a hex string.
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static char *toHex(unsigned long value, unsigned int digits);
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// Return the low byte of a word
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INLINE static Byte lo(Word value)
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{
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return ((Byte) value);
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}
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// Return the high byte of a word
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INLINE static Byte hi(Word value)
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{
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return (lo(value >> 8));
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}
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// Convert the bank number into a address
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INLINE static Addr bank(Byte b)
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{
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return (b << 16);
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}
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// Combine two bytes into a word
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INLINE static Word join(Byte l, Byte h)
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{
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return (l | (h << 8));
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}
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// Combine a bank and an word into an address
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INLINE static Addr join(Byte b, Word a)
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{
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return (bank(b) | a);
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}
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// Swap the high and low bytes of a word
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INLINE static Word swap(Word value)
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{
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return ((value >> 8) | (value << 8));
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}
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};
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#endif |