83Plus:Software:usb8x/Asm Interface/MSD/DOS fileSeek

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Synopsis

Name: DOS_fileSeek

Minimum usb8x version: 0.10

Sets seek pointer for file handle to specified offset.

Inputs

  • BC is a pointer to the file handle of an opened file
  • DEHL is a 32-bit offset to move the seek pointer to

Outputs

  • Seek pointer is modified

Destroys

  • AF, BC, DE, HL

Notes

Example code to jump to offset 53: 

ld bc,file_handle
ld de,0
ld hl,53
U_CALL DOS_fileSeek
;DOS_fileRead/DOS_fileWrite will read/write at offset 53

See Also

  • [[../DOS_openFile|DOS_openFile]] - Opens a file for reading/writing by populating a file handle
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