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- ScanMode is a program developed by Keld "HeartWare" Hansen. It scans
- through all modes on a VGA card and notes which modes are text modes and
- what their resolution is. It then saves this information in a file of the
- following format (PASCAL notation used):
-
- RECORD
- Version : BYTE { Must be 6 }
- Modes : ARRAY[1..n] OF RECORD
- ModeNo : BYTE;
- Width : BYTE;
- Height : BYTE;
- CharWidth : BYTE;
- ScanLines : WORD
- END
- END
-
- The CharWidth and ScanLines are set to zero by ScanMode and are only present
- in the file for future use.
-
- To point to the file, a standard is enforced:
- The environment variable MODEINFO is used to point to the file.
- If the value of MODEINFO is a directory, then the file is called
- MODEINFO.DAT in that directory.
- If the value of MODEINFO is a file without a file type, then .DAT
- is assumed.
- If the value of MODEINFO points to an existing file, then that's it!
-
- To switch into a specific text resolution, read the file, comparing the
- requested screen width and height to the values found in the record. When a
- match is found, you can switch into the mode specified by ModeNo and voilĂ ,
- you are in a text mode with that resolution.
-
- Please note, that Borland/Turbo Pascal doesn't recognize these extended
- text modes, and that if a person starts up a pascal program while being in
- one of these modes, then the initialization code in the CRT unit switches
- back into 80x25 (mode 3 or 7). Also note, that WRITE and WRITELN probably
- don't work in the extended text modes. You will need to do your own screen
- handling.
-
- You are hereby granted an unlimited license to distribute this archive with
- your Public Domain programs and the format of the file is released as Public
- Domain as well. If you want to distribute it as part of a shareware package,
- the only price I ask is a free registration of the program you want to send
- the SCANMODE archive with.
-