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Annotation of 43BSDReno/sys/hpstand/cons.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 University of Utah.
        !             3:  * Copyright (c) 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Systems Programming Group of the University of Utah Computer
        !             8:  * Science Department.
        !             9:  *
        !            10:  * Redistribution is only permitted until one year after the first shipment
        !            11:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !            12:  * binary forms are permitted provided that: (1) source distributions retain
        !            13:  * this entire copyright notice and comment, and (2) distributions including
        !            14:  * binaries display the following acknowledgement:  This product includes
        !            15:  * software developed by the University of California, Berkeley and its
        !            16:  * contributors'' in the documentation or other materials provided with the
        !            17:  * distribution and in all advertising materials mentioning features or use
        !            18:  * of this software.  Neither the name of the University nor the names of
        !            19:  * its contributors may be used to endorse or promote products derived from
        !            20:  * this software without specific prior written permission.
        !            21:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            22:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            23:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            24:  *
        !            25:  * from: Utah $Hdr: cons.c 1.5 89/08/22$
        !            26:  *
        !            27:  *     @(#)cons.c      7.2 (Berkeley) 5/25/90
        !            28:  */
        !            29: 
        !            30: #include "param.h"
        !            31: #include "samachdep.h"
        !            32: #include "machine/cons.h"
        !            33: 
        !            34: int    nodev();
        !            35: #ifdef ITECONSOLE
        !            36: int    iteprobe(), iteinit(), itegetchar(), iteputchar();
        !            37: #endif
        !            38: #ifdef DCACONSOLE
        !            39: int    dcaprobe(), dcainit(), dcagetchar(), dcaputchar();
        !            40: #endif
        !            41: #ifdef DCMCONSOLE
        !            42: int    dcmprobe(), dcminit(), dcmgetchar(), dcmputchar();
        !            43: #endif
        !            44: 
        !            45: struct consdev constab[] = {
        !            46: #ifdef ITECONSOLE
        !            47:        { iteprobe,     iteinit,        itegetchar,     iteputchar },
        !            48: #endif
        !            49: #ifdef DCACONSOLE
        !            50:        { dcaprobe,     dcainit,        dcagetchar,     dcaputchar },
        !            51: #endif
        !            52: #ifdef DCMCONSOLE
        !            53:        { dcmprobe,     dcminit,        dcmgetchar,     dcmputchar },
        !            54: #endif
        !            55:        { 0 },
        !            56: };
        !            57: 
        !            58: struct consdev *cn_tab;
        !            59: int noconsole;
        !            60: 
        !            61: cninit()
        !            62: {
        !            63:        register struct consdev *cp;
        !            64: 
        !            65:        cn_tab = NULL;
        !            66:        noconsole = 1;
        !            67:        for (cp = constab; cp->cn_probe; cp++) {
        !            68:                (*cp->cn_probe)(cp);
        !            69:                if (cp->cn_pri > CN_DEAD &&
        !            70:                    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
        !            71:                        cn_tab = cp;
        !            72:        }
        !            73:        if (cn_tab) {
        !            74:                (*cn_tab->cn_init)(cn_tab);
        !            75:                noconsole = 0;
        !            76:        }
        !            77: }
        !            78: 
        !            79: cngetc()
        !            80: {
        !            81:        if (cn_tab)
        !            82:                return((*cn_tab->cn_getc)());
        !            83:        return(0);
        !            84: }
        !            85: 
        !            86: cnputc(c)
        !            87:        int c;
        !            88: {
        !            89:        if (cn_tab)
        !            90:                (*cn_tab->cn_putc)(c);
        !            91: }

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