home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Cream of the Crop 1
/
Cream of the Crop 1.iso
/
PROGRAM
/
DJLSR106.ARJ
/
SCREEN.C
< prev
next >
Wrap
C/C++ Source or Header
|
1992-03-29
|
1KB
|
44 lines
/* This is file SCREEN.C */
/*
** Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
**
** This file is distributed under the terms listed in the document
** "copying.dj", available from DJ Delorie at the address above.
** A copy of "copying.dj" should accompany this file; if not, a copy
** should be available from where this file was obtained. This file
** may not be distributed without a verbatim copy of "copying.dj".
**
** This file is distributed WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**
** Modified by J. Alan Eldridge, Liberty Brokerage, 77 Water St., NYC 10005
** Fixed ScreenRows() - the memory location it references is rows - 1, so
** have to add 1 before returning value. Added ScreenMode().
*/
#include "pc.h"
int ScreenRows()
{
return *(unsigned char *)0xe0000484 + 1;
}
int ScreenCols()
{
return *(unsigned short *)0xe000044a;
}
int ScreenMode()
{
return *(unsigned char *)0xe0000449;
}
void ScreenPutChar(int ch, int attr, int x, int y)
{
ch &= 0xff;
attr = (attr & 0xff) << 8;
if ((x < 0) || (y < 0) || (x >= ScreenCols()) || (y > ScreenRows()))
return;
*(unsigned short *)(0xe01b8000+x*2+y*ScreenCols()*2) = ch | attr;
}