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- ; 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
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