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BIOS: Difference between revisions
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Add a link to the IBM BIOS manual, which is a great reference for the arguments to the BIOS interrupt routines.
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m (Add a link to the IBM BIOS manual, which is a great reference for the arguments to the BIOS interrupt routines.) |
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==BIOS functions==
To access a BIOS function, you generally set the AH [[CPU Registers x86|CPU register]] (or AX, or EAX) to a particular value, and then do
an INT opcode. The value in AH (or AX, or EAX), combined with the particular interrupt number selected requests a specific
BIOS function. (Other CPU registers hold any "arguments" to the function, and often the return values from the function, also.)
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Try to always test these error returns, because in many circumstances the BIOS functions might appear to be returning valid
(but very wrong) data -- rather than an error code.
==BIOS in Protected Mode==
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=== Articles ===
* [[Real Mode OS Warning]]
* [[DMI]]
=== Threads ===
* [
=== External Links ===
* [[wikipedia:BIOS | BIOS
* [http://www.ctyme.com/intr/int.htm http://www.ctyme.com/intr/int.htm]
* [http://classiccomputers.info/down/IBM_PS2/documents/PS2_and_PC_BIOS_Interface_Technical_Reference_Apr87.pdf 1987 IBM BIOS Technical Reference]
[[Category:X86]]
[[Category:BIOS]]
[[Category:Firmware]]
[[de:Basic Input Output System]]
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