Subj : Re: cputs does not work in graphics-modi ?
To   : borland.public.cpp.borlandcpp
From : Ed Mulroy
Date : Mon Sep 12 2005 10:01 am

Only some motherboard BIOS and video board implementations have the ability 
to write characters using the text mode calls when in graphics mode.

If you examine the manuals that came with Turbo C you will find that the 
Borland Graphics Interface or BGI provides the ability to write graphics 
mode programs.  Among those functions in the BGI are ones which allow 
writing text to a graphics screen.

The runtime library also provides a set of functions for text mode direct 
screen handling, the functions whose prototypes are in CONIO.H.

A variable is provided to force some of the text mode direct screen handling 
functions to use BIOS calls.  It is useful on machines which support such 
activity.   Assuming that, as a developer, you purchased the runtime library 
source package, you can examine that to see what is actually done by those 
routines.

The CONIO.H functions have been stable for 20 years.  If setting the 
variable fails to cause the functions to perform on a given machine, the 
code to suspect is that in the BIOS ROMs, video board ROMs and character 
generator ROMs.

..  Ed

> R.Wieser wrote in message
> news:43253927@newsgroups.borland.com

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