C++ (Cpp) matrix_get_active_columns_by_column Examples

Example #1

File: c64cia1.c Project: EdCornejo/emu-ex-plus-alpha

static BYTE read_ciapa(cia_context_t *cia_context)
{
    BYTE byte;
    BYTE val = 0xff;
    BYTE msk;
    BYTE m, tmp;
    int i;

    DBGA(("PA ddra:%02x pa:%02x ddrb:%02x pb:%02x ",
          cia_context->c_cia[CIA_DDRA], cia_context->c_cia[CIA_PRA],
          cia_context->c_cia[CIA_DDRB], cia_context->c_cia[CIA_PRB]));

    /* loop over columns,
       pull down all bits connected to a column which is output and active.
     */
    msk = cia_context->old_pb & read_joyport_dig(JOYPORT_1);
    if (c64keyboard_active) {
        for (m = 0x1, i = 0; i < 8; m <<= 1, i++) {
            if (!(msk & m)) {
                tmp = matrix_get_active_columns_by_column(i);

                /* when scanning from port B to port A with inactive bits set to 1
                   in port B, ghostkeys will be eliminated (pulled high) if the
                   matrix is connected to more 1 bits of port B. this does NOT happen
                   when the respective bits are set to input. (see testprogs/CIA/ciaports)
                 */
                if (tmp & cia_context->c_cia[CIA_PRB] & cia_context->c_cia[CIA_DDRB]) {
                    val &= ~rev_keyarr[i];
                    DBGA(("<force high %02x>", m));
                } else {
                    val &= ~matrix_get_active_rows_by_column(i);
                }
            }
        }
    }
    DBGA((" val:%02x", val));

    /* loop over rows,
       pull down all bits connected to a row which is output and active.
       handles the case when port a is used for both input and output
     */
    msk = cia_context->old_pa & read_joyport_dig(JOYPORT_2);
    if (c64keyboard_active) {
        for (m = 0x1, i = 0; i < 8; m <<= 1, i++) {
            if (!(msk & m)) {
                val &= ~matrix_get_active_rows_by_row(i);
            }
        }
    }
    DBGA((" val:%02x", val));

    byte = (val & (cia_context->c_cia[CIA_PRA] | ~(cia_context->c_cia[CIA_DDRA]))) & read_joyport_dig(JOYPORT_2);

    DBGA((" out:%02x\n", byte));

    return byte;
}

Example #2

File: c64cia1.c Project: peterled/vice

static BYTE read_ciapa(cia_context_t *cia_context)
{
    BYTE byte;
    BYTE val = 0xff;
    BYTE msk;
    BYTE m, tmp;
    int i;

    DBGA(("PA ddra:%02x pa:%02x ddrb:%02x pb:%02x ",
          cia_context->c_cia[CIA_DDRA], cia_context->c_cia[CIA_PRA],
          cia_context->c_cia[CIA_DDRB], cia_context->c_cia[CIA_PRB]));

    /* loop over columns,
       pull down all bits connected to a column which is output and active.
     */
    msk = cia_context->old_pb & ~joystick_value[1];
    for (m = 0x1, i = 0; i < 8; m <<= 1, i++) {
        if (!(msk & m)) {
            tmp = matrix_get_active_columns_by_column(i);

            /* when scanning from port B to port A with inactive bits set to 1
               in port B, ghostkeys will be eliminated (pulled high) if the
               matrix is connected to more 1 bits of port B. this does NOT happen
               when the respective bits are set to input. (see testprogs/CIA/ciaports)
             */
            if (tmp & cia_context->c_cia[CIA_PRB] & cia_context->c_cia[CIA_DDRB]) {
                val &= ~rev_keyarr[i];
                DBGA(("<force high %02x>", m));
            } else {
                val &= ~matrix_get_active_rows_by_column(i);
            }
        }
    }
    DBGA((" val:%02x", val));

    /* loop over rows,
       pull down all bits connected to a row which is output and active.
       handles the case when port a is used for both input and output
     */
    msk = cia_context->old_pa & ~joystick_value[2];
    for (m = 0x1, i = 0; i < 8; m <<= 1, i++) {
        if (!(msk & m)) {
            val &= ~matrix_get_active_rows_by_row(i);
        }
    }
    DBGA((" val:%02x", val));

    byte = (val & (cia_context->c_cia[CIA_PRA] | ~(cia_context->c_cia[CIA_DDRA]))) & ~joystick_value[2];

    DBGA((" out:%02x\n", byte));

#ifdef HAVE_MOUSE
    if (_mouse_enabled && (mouse_port == 2)) {
        switch (mouse_type) {
        case MOUSE_TYPE_NEOS:
            byte &= neos_mouse_read();
            break;
        case MOUSE_TYPE_SMART:
            byte &= smart_mouse_read();
            break;
        case MOUSE_TYPE_ST:
        case MOUSE_TYPE_AMIGA:
        case MOUSE_TYPE_CX22:
            byte &= mouse_poll();
            break;
        case MOUSE_TYPE_MICROMYS:
            byte &= micromys_mouse_read();
            break;
        default:
            break;
        }
    }
#endif

    return byte;
}