From:	billyc AT ncdc DOT cirrus DOT com (billy chen)
Newsgroups:	comp.os.msdos.djgpp,comp.os.msdos.programmer
Subject:	Re: Dual monitor debugging?
Date:	Mon, 01 Dec 1997 22:31:02 GMT
Organization:	Cirrus Logic NC
Lines:	374
Message-ID:	<3483399d.17761605@news.cirrus.com>
References:	<65u9r7$5h9$1 AT news2 DOT xs4all DOT nl>
NNTP-Posting-Host:	dellp200.rsa.cirrus.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have MCprint.c and MCprint.h. Your are welcom to have it. No support
please.



-------------------mcprint.h
/*
    No longer needed it

    This are suppose to be private functions

    void save_mcscreen();
    void restore_mcscreen();

    void scroll_screen();
*/

void open_mcprint(int mode);
void close_mcprint();
void set_cursor(int x, int y);
void mccls(int mode);
void mcputs(char *s);
void mcputc(char c);
void mcprintf(char *format, ... );

-------------------mcprint.c

#include <stdio.h>
#include <pc.h>
#include <sys/movedata.h>

#define  MCHIGH       24
#define  MCWIDTH      80

#define  FIXEDHIGH    25
#define  FIXEDWIDTH   80

#define  MCHIGH1      (MCHIGH-1)
#define  MCWIDTH2     MCWIDTH*2
#define  FIXEDHIGH1   (FIXEDHIGH-1)
#define  FIXEDWIDTH2  FIXEDWIDTH*2
unsigned long MC = 0xB0000L;
unsigned short  mcscreen[FIXEDHIGH][FIXEDWIDTH];
unsigned char oldcursorh,  /* position */
              oldcursorl;
int           cursorRow=0,
              cursorCol=0;
int           mcprintflag = 0;
char          buffer[1000];
/*
-----------------------------------------------------------------------
Cursor control: 6845 CRT conntroller

port location:

   CGA 3D4/3D5
 * MDA 3B4/3B5

register on port 3B4 of MDA

        offset 0AH scan line for start
               0BH scan line for end

               200/25 = 8  PCjr
               350/25 = 14 MDA

        offset 0EH 6 bits high order byte
               0FH 8 bits low  order byte
-----------------------------------------------------------------------
*/
void set_cursor(int x, int y);
void save_mcscreen();
void restore_mcscreen();
void open_mcprint(int mode);
void close_mcprint();
void scroll_screen();
void mccls(int mode);
void mcputs(char *s);
void mcputc(char c);
void mcprintf(char *format, ... );

void set_cursor(int x, int y)
{
    unsigned short cp = (unsigned short)(x+y*FIXEDWIDTH);
    unsigned char h, l;

    h = (unsigned char)(cp >> 8)&0xff;
    l = (unsigned char)(cp&0xff);

    /* set cursor position in the position for MDA */
    outportb(0x3b4, 0xe);
    outportb(0x3b5, h);
    outportb(0x3b4, 0xf);
    outportb(0x3b5, l);

    /* set cursor shape for MDA */
    outportb(0x3b4, 0xa);
    outportb(0x3b5, 1);
    outportb(0x3b4, 0xb);
    outportb(0x3b5, 14);
}
void open_mcprint(int mode)
{
    if( mcprintflag == 1 ) return;
    save_mcscreen();
    mccls(mode);
    atexit(restore_mcscreen);
    mcprintflag = 1;
}
void close_mcprint()
{
    if( mcprintflag == 0 ) return;
    restore_mcscreen();
    mcprintflag = 0;
}
unsigned char manutextv[82]=
"fine fast [j|u +|-]-Scale  [l/k o/i 0/9]-next 1/10/100 glyph
[h]-Hinting on/off ";
unsigned char manuattribv[82]=
"pppppppppppppppppppppppp";

unsigned char manutextz[82]=
"fine fast [x|c v|b]-Rotation [j|u +|-]-Scale   [l/k o/i 0/9]-Next
1/10/100 glyph";
unsigned char manuattribz[82]=
"ppppppppppppppppppppppppppppp";

void put_manu(int mode)
{
    int i, j;
    switch( mode )
    {
        case 1:
             for( i = 0; i < 80; i++ ){
                  buffer[j++] = manutextv[i];
                  buffer[j++] = manuattribv[i];
             }
             break;
        case 2:
             for( i = 0; i < 80; i++ ){
                  buffer[j++] = manutextz[i];
                  buffer[j++] = manuattribz[i];
             }
             break;
        default:
             for( i = 0; i < 80; i++ ){
		  buffer[j++] = ' ';
		  buffer[j++] = 0x1f;
             }
             break;
    }
    dosmemput( buffer, MCWIDTH2, MC+FIXEDHIGH1*MCWIDTH2);
}

void save_mcscreen()
{
    /* keep old cursor position */
    outportb(0x3b4, 0xe);
    oldcursorh = inportb(0x3b5);
    outportb(0x3b4, 0xf);
    oldcursorl = inportb(0x3b5);

    /* keep old data in screen */
    dosmemget( 0xB0000, FIXEDWIDTH2*FIXEDHIGH, mcscreen);

}
void restore_mcscreen()
{
    /* restore old cursor position */
    outportb(0x3b4, 0xe);
    outportb(0x3b5, oldcursorh);
    outportb(0x3b4, 0xf);
    outportb(0x3b5, oldcursorl);

    /* restore old cursor shape use default (a/b is read only
regioster) */
    outportb(0x3b4, 0xa);
    outportb(0x3b5, 11);
    outportb(0x3b4, 0xb);
    outportb(0x3b5, 13);

    /* restore old cursor position */
    dosmemput( mcscreen, FIXEDWIDTH2*FIXEDHIGH, 0xB0000);
}
void mccls(int mode)
{
    int i;

    for( i = 0; i < FIXEDWIDTH2; i++ ) buffer[i]=0;
    for( i = 0; i < FIXEDHIGH; i++ )  dosmemput( buffer, FIXEDWIDTH2,
MC+i*FIXEDWIDTH2);
    /* set cursor in (0, 0)*/
    outportb(0x3b4, 0xe);
    outportb(0x3b5, 0);
    outportb(0x3b4, 0xf);
    outportb(0x3b5, 0);
    put_manu(mode);
}
void scroll_screen()
{
    int i;
    for( i = 0; i < MCHIGH1; i++ ) {
         dosmemget(MC+(i+1)*MCWIDTH2, MCWIDTH2, buffer);
         dosmemput( buffer, MCWIDTH2, MC+i*MCWIDTH2);
    }

    for( i = 0; i < MCWIDTH2; i++ ) buffer[i] = 0;
    dosmemput( buffer, MCWIDTH2, MC+MCHIGH1*MCWIDTH2);
}
void mcputs(char *s)
{
    int   i, j, k;

    k = strlen(s);
    if( cursorRow >= MCHIGH ) {
        cursorRow = MCHIGH1;
        scroll_screen();
    }
    for( i = 1; i < MCWIDTH2; i+=2 ) buffer[i] = 7;  /* attrib for mc
*/
    for( i = 0; i < k; i++ ){
         j = i<<1;
         buffer[j] = s[i];
    }
    for( i = k; i < MCWIDTH; i++ ){
         j = i<<1;
         buffer[j] = ' ';
    }
    dosmemput( buffer, MCWIDTH2, MC+cursorRow*MCWIDTH2);
    cursorCol = k;
    set_cursor(cursorCol, cursorRow);
    cursorRow++;
}
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>

char pbuffer[512];
char text[5];
void mcputc(char c)
{
    unsigned long p;

    switch( c ) {
        case 10   :
             cursorRow++;
        case 13   :
             cursorCol = 0;
             break;
        default:
             text[0]  = c;
             text[1]  = 7; /* attrib */
             p = (unsigned long)(cursorCol+cursorRow*MCWIDTH)*2;
             dosmemput( text, 2, MC+p );
             cursorCol++;
             break;
    }
    if( cursorCol >= MCWIDTH ){
        cursorCol = 0;
        cursorRow++;
    }
    if( cursorRow >= MCHIGH ){
        cursorRow--;
        scroll_screen( );
    }
    set_cursor( cursorCol, cursorRow );
}
void mcprintf(char *format, ... )
{
    va_list  args;
    int i, k;

    va_start(args, format);
    vsprintf(pbuffer, format, args);
    k = strlen( pbuffer );
    if( k > (512-1) ) k = 512-1;

    for( i = 0; i < k; i++ )
         mcputc( pbuffer[i] );
}

#ifdef DEBUG
main()
{
   mcprintf( " Test one \n\n\n");
   getch();
   mcprintf( " Test one 1\n\n\n");
   getch();
   mcprintf( " Test one 2\n\n\n");
   getch();
   mcprintf( " Test one 3\n\n\n");
   getch();
   mcprintf( " Test one 4\n\n\n");
   mcputs("012332342343242344443223424234423");
   mcputs("012332342343242344443223424234423");
   mcputs("012332342343242344443223424234423");
   mcputs("012332342343242344443223424234423");
   mcputs("012332342343242344443223424234423\n");

   getch();

   mcprintf( " Test one");
   getch();
   mcprintf( " Test 1");
   getch();
   mcprintf( " Test 2");
   getch();
   mcprintf( " Test 3");
   getch();
   mcprintf( " Test one\n");
   getch();
   mcprintf( " Test one\n");
   getch();
   mcprintf( " Test one\n");
   getch();
   mcprintf( " Test one\n");
   getch();
   mcprintf( " Test one\n");
   getch();
   mcprintf( " Test one\n");
   getch();

   mcprintf( " Test 1\n");
   getch();
   mcprintf( " Test 2\n");
   getch();
   mcprintf( " Test 3\n");
   getch();
   mcprintf( " Test 4\n");
   getch();
   mcprintf( " Test 5\n");
   getch();
   mcputs("01233234234324234444322342423441");
   getch();
   mcputs("0");
   getch();
   mcputs("01111111111111");
   getch();
   mcputs("0");
   getch();

}
#endif



On 1 Dec 1997 12:16:39 GMT, rkramer AT xs4all DOT nl () wrote:

>Hi all,
>
>This might be slightly off-topic, but I'm trying to debug my graphics
>application using an additional Hercules monitor. Redirecting to a file
>doesn't work, because the last (and the only relevant) bit of debug info
>is lost after crash/termination of my application..
>
>I tried 'mode mono' and mshell by DJ Delorie, but both only move the
>blinking cursor on my mono screen - I don't see any text. I'm working in a
>Win95 DOS box. Can anyone tell me how to get this working, or point me to
>a dual-monitor debugging FAQ or something? Shouldn't I see any text if I
>output bytes to b000:0 in DEBUG? (I don't! :)
>
>Is there a simpler way to do this under Win95, for example redirect stdout
>to some window?
>
>Thanks!
>
>        Rob Kramer
>        rkramer AT xs4all DOT nl
>
>P.S. Could you please CC to my personal e-mail address? Ta!
>
>
>

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