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Primary/Secondary (Master/Slave) |
Status |
Physical Drive Number and Description |
Primary Master |
Disk is Present |
Physical Drive Number will be 80H. In this case the Hard Disk is called the First Hard Disk. |
Primary Slave |
Disk is Present |
Physical Drive Number will be 81H. In this case the Hard Disk is called the Second Hard Disk. |
Secondary Master |
Disk Not Present |
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Secondary Slave |
Disk is Present |
Physical Drive Number will be 82H. In this case the Hard Disk is called the Third Hard Disk. |
- If two Hard Disks are connected to the system: Similarly, if two Hard Disks are connected to the system the physical drive numbers will be as according to their attachment preferences. Following example illustrates it:
Primary/Secondary (Master/Slave) |
Status |
Physical Drive Number and Description |
Primary Master |
Disk is Present |
Physical Drive Number will be 80H. In this case the Hard Disk is called the First Hard Disk. |
Primary Slave |
Disk Not Present |
------------------- |
Secondary Master |
Disk Not Present |
------------------- |
Secondary Slave |
Disk is Present |
Physical Drive Number will be 81H. In this case the Hard Disk is called the Second Hard Disk. |
- If Single Hard Disk is connected to the system: Need not to think, if there is only one disk available, the physical drive number will be 80H.
Interrupt 13H (INT 13H), ROM BIOS Disk Driver Functions
The description of INT 13H functions has been given here. These functions should be learnt with care, as the misuse of these functions or use in lack of care or lack of knowledge, may cause big loss of data or many other problems. However if used in a appropriate and proper way these functions help to minimize the coding of your program and to make your programming simple and easy as well as.
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