kputc.c,v

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head	1.3;
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1.3
date	97.09.21.19.29.30;	author dls;	state Dist;
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next	1.2;

1.2
date	94.04.26.15.15.20;	author dls;	state Works;
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next	1.1;

1.1
date	94.03.28.18.07.53;	author dls;	state Works;
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1.3
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@pre-3e code
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@/* kputc.c - kputc */

#include <conf.h>
#include <kernel.h>
#include <tty.h>

/*------------------------------------------------------------------------
 * kputc - do a synchronous kernel write to the console tty
 *------------------------------------------------------------------------
 */
int
kputc(dev, c)
int		dev;	/* fake dev-- always the console */
unsigned char	 c;
{
	kbmputc(&devtab[KBMON], c);
	comsputc(&devtab[SERIAL1], c);
#ifdef notdef
	if (devtab[CONSOLE].dvioblk)
		putc(CONSOLE, c);
	else /* no tty yet; put it on SERIAL0 */
		comsputc(&devtab[SERIAL0], c);
#endif
	return OK;
}
@


1.2
log
@*** empty log message ***
@
text
@d1 9
a9 37
/*	BSDI $Id: kputc.c,v 1.1 1994/03/28 18:07:53 dls Works dls $	*/
/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@@(#)cga.c	5.3 (Berkeley) 4/28/91
d11 1
a11 22

#define	COL		80
#define	ROW		25
#define	CHR		2
#define MONO_BASE	0x3B4
#define MONO_BUF	0xB0000
#define CGA_BASE	0x3D4
#define CGA_BUF		0xB8000

static unsigned char	att = 0x7;
unsigned char *Crtat = (unsigned char *)CGA_BUF;

static unsigned int addr_6845 = CGA_BASE;
cursor(pos)
int pos;
{
	outb(addr_6845,14);
	outb(addr_6845+1,pos >> 8);
	outb(addr_6845,15);
	outb(addr_6845+1,pos&0xff);
}

d16 9
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	static unsigned char *crtat = 0;
	unsigned cursorat; unsigned short was;
	unsigned char *cp;

	if (crtat == 0) {

		/* XXX probe to find if a color or monochrome display */
		was = *(unsigned short *)Crtat;
		*(unsigned short *)Crtat = 0xA55A;
		if (*(unsigned short *)Crtat != 0xA55A) {
			Crtat = (unsigned char *) MONO_BUF;
			addr_6845 = MONO_BASE;
		}
		*(unsigned short *)Crtat = was;

		/* Extract cursor location */
		outb(addr_6845,14);
		cursorat = inb(addr_6845+1)<<8 ;
		outb(addr_6845,15);
		cursorat |= inb(addr_6845+1);

		if (cursorat <= COL * ROW)
			crtat = Crtat + cursorat * CHR;
		else
			crtat = Crtat;

		/* clean display */
		for (cp = crtat; cp < Crtat+ROW*COL*CHR; cp += 2) {
			cp[0] = ' ';
			cp[1] = att;
		}
	}

	switch (c) {

	case '\t':
		do
			kputc(' ');
		while ((int)crtat % (8*CHR));
		break;

	case '\010':
		crtat -= CHR;
		break;

	case '\n':
		crtat += COL*CHR ;
		/* fall through */
	case '\r':
		crtat -= (crtat - Crtat) % (COL*CHR);
		break;

	default:
		crtat[0] = c;
		crtat[1] = att;
		crtat += CHR;
		break ;
	}

	/* implement a scroll */
	if (crtat >= Crtat+COL*ROW*CHR) {
		/* move text up */
		bcopy(Crtat+COL*CHR, Crtat, COL*(ROW-1)*CHR);

		/* clear line */
		for (cp = Crtat+ COL*(ROW-1)*CHR;
			cp < Crtat + COL*ROW*CHR ; cp += 2)
			cp[0] = ' ';

		crtat -= COL*CHR ;
	}

	cursor((crtat-Crtat)/CHR);
@


1.1
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@Initial revision
@
text
@d1 1
a1 1
/*	BSDI $Id: cga.c,v 1.3 1992/09/29 22:53:36 karels Exp $	*/
d61 3
a63 2
kputc(c)
unsigned char c;
d111 3
a115 4
		break;

	case '\n':
		crtat += COL*CHR ;
@