rom.cpp

#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

class rom {
public:
    rom ( ifstream & stream );
    ~rom();

    void read ( ifstream & stream );
    void dump ( ofstream & stream );
    void setPage ( int p );

private:
    unsigned char readByte ( ifstream & stream );

    unsigned char conv ( unsigned char a );

    unsigned char data[0x80 * 0x4000];
    int pageNo;

};

rom::rom ( ifstream & stream ) {
    memset ( data, 0xff, sizeof ( data ) );

    read ( stream );
    pageNo = 0;
}

rom::~rom() {

}

void rom::read ( ifstream & stream ) {
    try {
        while ( 1 ) {
            stream.get(); // garbage

            int len = readByte ( stream );
            int addr = ( ( ( ( int ) readByte ( stream ) ) << 8 ) & 0xff00 ) | ( ( int ) readByte ( stream ) & 0xff );
            int type = readByte ( stream );

            if ( type == 0 ) {
                for ( int i = 0; i < len; i++ ) {
                    data[pageNo * 0x4000 + (addr + i) % 0x4000] = readByte ( stream );
                }
            } else if ( type == 2 ) {
                pageNo = ( ( ( ( int ) readByte ( stream ) ) << 8 ) & 0xff00 ) | ( ( int ) readByte ( stream ) & 0xff );
		
		if(pageNo > 0x10)
		{
		  pageNo += 0x60;
		}
            }
            else if(type == 1)
	    {
	      cout << "END\n";
	    }

            readByte ( stream );

            stream.get(); // newline

            if ( type == 2 )
                cout << "Page " << pageNo << endl;

            if ( type == 0x01 ) {
	      cout << "END\n";
                break;
            }
        }
    } catch ( unsigned char c ) {
        cout << "Failed to read '" << c << "'\n";
    }
}

unsigned char rom::conv ( unsigned char a ) {

    if ( a >= 'A' && a <= 'F' ) {
        a = a - 'A' + 0xA;
    } else if ( a >= '0' && a <= '9' ) {
        a -= '0';
    } else {
        throw a;
    }

    return a;
}


unsigned char rom::readByte ( ifstream & stream ) {
    char a, b;

    stream >> a >> b;

    return ( conv ( a ) << 4 ) | conv ( b );
}

void rom::dump ( ofstream & stream ) {
    stream.write ( (const char*)data, sizeof ( data ) );
}

void rom::setPage ( int p ) {
    pageNo = p;
}

int main ( int argc, char ** argv ) {
    ifstream in ( argv[1] );

    rom p ( in );

    in.close();

    ofstream out ( argv[2] );

    p.dump ( out );

    out.close();

    return 0;
}