Detecting Colour and Monochrome Monitors: Difference between revisions
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== The Function == |
== The Function == |
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< |
<syntaxhighlight lang="c"> |
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#include <stdint.h> |
#include <stdint.h> |
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return (enum video_type) (detect_bios_area_hardware() & 0x30); |
return (enum video_type) (detect_bios_area_hardware() & 0x30); |
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} |
} |
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</syntaxhighlight> |
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</source> |
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[[Category:Video]] |
[[Category:Video]] |
Latest revision as of 05:13, 9 June 2024
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
#include <stdint.h>
enum video_type
{
VIDEO_TYPE_NONE = 0x00,
VIDEO_TYPE_COLOUR = 0x20,
VIDEO_TYPE_MONOCHROME = 0x30,
};
uint16_t detect_bios_area_hardware(void)
{
const uint16_t* bda_detected_hardware_ptr = (const uint16_t*) 0x410;
return *bda_detected_hardware_ptr;
}
enum video_type get_bios_area_video_type(void)
{
return (enum video_type) (detect_bios_area_hardware() & 0x30);
}