Parameter |
Size in Bytes |
Description |
pp.packetsize = 16 ; |
1 Byte |
Size of packet = 10H |
pp.reserved = 0 ; |
1 Byte |
Reserved = 0 |
pp.blockcount = numofsectors ; |
2 Bytes |
Number of sectors to read |
pp.bufferaddress = (char far*)
MK_FP ( FP_SEG((void far*)buffer), FP_OFF((void far*)buffer)); |
----- |
for Data buffer or Transfer Buffer |
pp.blocknumber[0] = sectornumber ; |
4 Bytes |
Sector number to read/write (generally, we need only this). Only alone This can support up to 2.1 Terabytes. |
pp.blocknumber[1] = 0 ; |
4 Bytes |
Block number.
Use this, If accessing the disk of greater then 2.1 Terabytes in size. |
i.h.ah = 0x42 ; or i.h.ah = 0x43 ; |
2 Bytes |
Function Number of INT 13H Extensions |
i.h.al = 0x00 ; |
1 Byte |
Write Flags used in write function only,
00H, 01H are used for Write Without Verify and 02H is used for write with verify |
i.h.dl = drive ; |
2 Bytes |
Physical Drive Number |
i.x.si = FP_OFF ( (void far*)&pp ) ; |
------ |
ds:si for buffer Parameters |
s.ds = FP_SEG ( (void far*)&pp ) ; |
------ |
ds:si for buffer Parameters |
int86x ( 0x13, &i, &o, &s ) ; |
------ |
Invoke the specified Function of INT 13H with segment register values |
