Subversion Repositories s80186

// Copyright Jamie Iles, 2017

//

// This file is part of s80x86.

//

// s80x86 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.

//

// s80x86 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 s80x86.  If not, see <http://www.gnu.org/licenses/>.

#include <iostream>

#include <stdint.h>

#include "UART.h"

#include "CPU.h"

UART::UART() : IOPorts(0xfffa, 1)

{

}

void UART::write8(uint16_t __unused port_num, unsigned offs, uint8_t v)

{

    if (offs == 0) {

        std::cout << static_cast<char>(v);

        std::cout.flush();

    }

}

void UART::write16(uint16_t __unused port_num, uint16_t v)

{

    write8(port_num, 0, v);

    write8(port_num, 1, v >> 8);

}

uint8_t UART::read8(uint16_t __unused port_num, unsigned offs)

{

    if (offs == 0) {

        if (!charbuf.size())

            return 0;

        auto v = charbuf[0];

        charbuf.pop_front();

        return v;

    } else {

        return !!charbuf.size();

    }

}

uint16_t UART::read16(uint16_t __unused port_num)

{

    return read8(0, 0) | (static_cast<uint16_t>(read8(0, 1)) << 8);

}

void UART::add_char(int c)

{

    charbuf.push_back(c);

}