Hai
1. How does an os communicates with BIOS?
2. What r the routines in bios and how bios is programmed?
3.Is BIOS interrupts r standard (independent of Bios manufacturers)?
BIOS
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AR
Re:BIOS
1. Protected Mode Operating Systems like Windows don't use the BIOS once they've loaded drivers to deal with the hardware directly, during the boot process in Real Mode though, the BIOS features are accessed via Interrupts.
2. See Ralf Brown's Interrupt List
3. The interrupts are standards between BIOS but there are some custom extensions that some vendors have but others don't, there is, of course, also no guarantee of how completely the BIOS supports the interrupts (Various functions may not be present in a given BIOS).
2. See Ralf Brown's Interrupt List
3. The interrupts are standards between BIOS but there are some custom extensions that some vendors have but others don't, there is, of course, also no guarantee of how completely the BIOS supports the interrupts (Various functions may not be present in a given BIOS).