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- /* 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.
- */
-
- #include "pc.h"
-
- int ScreenRows()
- {
- return *(unsigned char *)0xe0000484;
- }
-
- int ScreenCols()
- {
- return *(unsigned short *)0xe000044a;
- }
-
- 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 *)(0xe00b8000+x*2+y*ScreenCols()*2) = ch | attr;
- }