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Annotation of Gnu-Mach/i386/pc/putchar.c, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Copyright (c) 1995-1994 The University of Utah and
                      3:  * the Computer Systems Laboratory at the University of Utah (CSL).
                      4:  * All rights reserved.
                      5:  *
                      6:  * Permission to use, copy, modify and distribute this software is hereby
                      7:  * granted provided that (1) source code retains these copyright, permission,
                      8:  * and disclaimer notices, and (2) redistributions including binaries
                      9:  * reproduce the notices in supporting documentation, and (3) all advertising
                     10:  * materials mentioning features or use of this software display the following
                     11:  * acknowledgement: ``This product includes software developed by the
                     12:  * Computer Systems Laboratory at the University of Utah.''
                     13:  *
                     14:  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
                     15:  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
                     16:  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     17:  *
                     18:  * CSL requests users of this software to return to [email protected] any
                     19:  * improvements that they make and grant CSL redistribution rights.
                     20:  *
                     21:  *      Author: Bryan Ford, University of Utah CSL
                     22:  */
                     23: 
                     24: #include <mach/machine/eflags.h>
                     25: 
                     26: #include "real.h"
                     27: 
                     28: #ifndef ENABLE_IMMCONSOLE
                     29: 
                     30: #include <rc.h>
                     31: int putchar(int c)
                     32: {
                     33: 
                     34:        if (c == '\n')
                     35:                putchar('\r');
                     36: 
                     37:        {
                     38: #if RCLINE >= 0
                     39:                static int serial_inited = 0;
                     40:                if (! serial_inited) {
                     41:                        init_serial();
                     42:                        serial_inited = 1;
                     43:                }
                     44:                serial_putc(c);
                     45: #else
                     46:                struct real_call_data rcd;
                     47:                rcd.eax = 0x0e00 | (c & 0xff);
                     48:                rcd.ebx = 0x07;
                     49:                rcd.flags = 0;
                     50:                real_int(0x10, &rcd);
                     51: #endif
                     52:        }
                     53: 
                     54:        return 0;
                     55: }
                     56: 
                     57: #else ENABLE_IMMCONSOLE
                     58: 
                     59: void
                     60: putchar(unsigned char c)
                     61: {
                     62:        static int ofs = -1;
                     63: 
                     64:        if (ofs < 0)
                     65:        {
                     66:                ofs = 0;
                     67:                putchar('\n');
                     68:        }
                     69:        if (c == '\r')
                     70:        {
                     71:                ofs = 0;
                     72:        }
                     73:        else if (c == '\n')
                     74:        {
                     75:                bcopy(0xb8000+80*2, 0xb8000, 80*2*24);
                     76:                bzero(0xb8000+80*2*24, 80*2);
                     77:                ofs = 0;
                     78:        }
                     79:        else
                     80:        {
                     81:                volatile unsigned char *p;
                     82: 
                     83:                if (ofs >= 80)
                     84:                {
                     85:                        putchar('\r');
                     86:                        putchar('\n');
                     87:                }
                     88: 
                     89:                p = (void*)0xb8000 + 80*2*24 + ofs*2;
                     90:                p[0] = c;
                     91:                p[1] = 0x0f;
                     92:                ofs++;
                     93:        }
                     94: }
                     95: 
                     96: #endif ENABLE_IMMCONSOLE

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