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X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - format of sharing record:
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Format of sharing record:
Offset Size Description
00h BYTE flag
00h free block
01h allocated block
FFh end marker
01h WORD size of block
03h BYTE checksum of pathname (including NUL)
if sum of ASCII values is N, checksum is (N/256 + N%256)
04h WORD offset in SHARE's DS of lock record (see below)
06h DWORD pointer to start of system file table chain for file
0Ah WORD unique sequence number
0Ch var ASCIZ full pathname
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