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43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
;acptr() - Get data from the serial bus
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;Returns: A = Received Character
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;Preparatory routines: TALK, TKSA
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;Error returns: See READST
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;Stack requirements: 13
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;Registers affected: A, X
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ACPTR = $FFA5 ;Alias to ACPTR Routine
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;chkin(lfn) - Open a channel for input
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;Arguments: A = Logical File Number
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; Preparatory routines: (OPEN)
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; Error returns:
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; Stack requirements: None
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; Registers affected: A, X
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CHKIN: TAX ;Transfer Channel# to Accumulator
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JMP $FFC6 ;Execute CHKIN Routine
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;chkout(lfn) - Open a channel for output
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;Arguments: A = Logical File Number
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; Preparatory routines: (OPEN)
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; Error returns: 0,3,5,7 (See READST)
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; Stack requirements: 4+
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; Registers affected: A, X
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CHKOUT: TAX ;Transfer Channel# to Accumulator
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JMP $FFC9 ;Execute CHKOU7T Routine
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;chrin() - Get a character from the input channel
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;Returns: A = Byte Received
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; Preparatory routines: (OPEN, CHKIN)
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; Error returns: 0 (See READST)
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; Stack requirements: 7+
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; Registers affected: A, X
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CHRIN = $FFCF ;Alias to CHRIN Routine
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;chrout(chr) - Output a character
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;Arguments: A = Character to Send
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; Preparatory routines: (CHKOUT,OPEN)
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; Error returns: 0 (See READST)
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; Stack requirements: 8+
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; Registers affected: A
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CHRIN = $FFD2 ;Alias to CHROUT Routine
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