Detecting Colour and Monochrome Monitors: Difference between revisions
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Detecting whether a user has a colour or monochrome video card is a trivial task. The BIOS data segment has a value in it for this information. Below is a function (in ISO C) to retrieve this: |
Detecting whether a user has a colour or monochrome video card is a trivial task. The [[BIOS]] [[Memory Map (x86)#BIOS Data Area .28BDA.29|data segment]] has a value in it for this information. Below is a function (in ISO C) to retrieve this: |
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== The Function == |
== The Function == |
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Revision as of 12:19, 7 October 2010
Detecting whether a user has a colour or monochrome video card is a trivial task. The BIOS data segment has a value in it for this information. Below is a function (in ISO C) to retrieve this:
The Function
/*
Video card mono/colour detection.
Return values: false=colour
true=monochrome
*/
_Bool detectVideoType(void)
{
_Bool type;
char c=(*(volatile USHORT*)0x410)&0x30;
//c can be 0x00 or 0x20 for colour, 0x30 for mono.
return (c==0x30);
}