Int 60  u - HP 95lx System Manager - Open File                             [b]

   DI = 0500h
   STACK:  2 WORDs unused dummies (for calls from high level languages)
       DWORD   pointer to file state record (see below)
       DWORD   pointer to filename
       WORD    length of filename
       WORD    ???
       WORD    suppress buffering if nonzero

Return: AX = status
   STACK unchanged

See Also: INT 60/DI=0501h,INT 60/DI=0502h,INT 60/DI=0508h

Format of file state record:
Offset Size    Description
 00h   WORD    DOS file handle
 02h   WORD    flags
       bit 0: buffer contents valid
       bit 1: buffer is dirty and must be written
       bit 2: unbuffered I/O
       bit 3: file is a character device
 04h   DWORD   current DOS physical file offset (FFFFFFFFh if unknown)
 08h   DWORD   DOS file offset of start of buffer
 0Ch   DWORD   effective file offset as seen by caller
 10h   WORD    number of bytes in file buffer
---buffered I/O only---
 12h 512 BYTEs file buffer