; Useful KERNAL file I/O jump table entries
open	= $ffc0
close	= $ffc3
chkout	= $ffc9
clrchn	= $ffcc
chrout	= $ffd2
stop	= $ffe1
chkin	= $ffc6
chrin	= $ffcf
; Zero page variables related to file I/O
status	= $90; Kernal I/O Status Word
fnlen	= $B7; Length of Current File Name
la	= $B8; Current Logical File Number
sa	= $B9; Current Secondary Address
fa	= $BA; Current Device Number
fnadr	= $BB; Pointer: Current File Name