/
kernal_fk.txt
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/
kernal_fk.txt
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- C64 KERNAL API (Frank Kontros)
-
- C64 KERNAL jump table, composed by Frank Kontros (jeno@kontr.uzhgorod.ua).
- http://www.zimmers.net/anonftp/pub/cbm/c64/programming/documents/c64-kernal.txt
-
- Corrections (typos as well as content), translations etc.
- welcome at: https://github.com/mist64/c64ref
-
----------------------------------------------
-
# This plain text file is formatted so that it can be automatically
# parsed in order to create cross-references etc.
# * Lines starting with "-" is top-level information. The first line
# is the title. Lines starting with "--" are separators.
# * Lines starting with "#" are internal comments.
# * Hex addresses start at column 0.
# * Symbols start at column 7.
# * The description starts at column 15.
# * All lines of the description until the first blank line are
# combined into the heading.
# * The remaining text is in MarkDown format.
# The encoding is UTF-8.
$FF81 CINT init VIC & screen editor
- - - - - - A X Y
$FF84 IOINIT initialize CIA & IRQ
- - - - - - A X Y
$FF87 RAMTAS RAM test & search RAM end
- - - - - - A X Y
$FF8A RESTOR restore default I/O vectors
- - - - - - A - Y
$FF8D VECTOR read/set I/O vectors
in: C=0 moves from Y/X to vectors - X Y - X - A - Y
C=1 moves vectors to Y/X - X Y - X - A - Y
$FF90 SETMSG enable/disable KERNAL messages
in: A bit7=1 error msgs on A - - - - - A - -
bit6=1 control msgs on
$FF93 SECOND send secondary addr after listen
in: A=secondary address A - - - - - A - -
$FF96 TKSA send secondary addr after talk
in: A=secondary address A - - - - - A - -
$FF99 MEMTOP read/set top of memory
in: C=0; Y/X address - X Y - X Y - - -
out:C=1; Y/X address - - - - X Y - X Y
$FF9C MEMBOT read/set bottom of memory
in: C=0; Y/X address - X Y - X Y - - -
out:C=1; Y/X address - - - - X Y - X Y
$FF9F SCNKEY scan keyboard
- - - - - - A X Y
$FFA2 SETTMO set IEEE timeout
in: A bit7=1 disable, bit7=0 enable A - - A - - - - -
$FFA5 ACPTR input byte from SERIAL
out:A=byte, C=1 and ST=2 if timeout - - - A - - A - -
$FFA8 CIOUT output byte to SERIAL
in: A=byte, C=1 and ST=3 if timeout A - - A - - - - -
$FFAB UNTLK untalk all SERIAL devices
- - - - - - A - -
$FFAE UNLSN unlisten all SERIAL devices
- - - - - - A - -
$FFB1 LISTEN make SERIAL device listen
in: A=device number A - - - - - A - -
$FFB4 TALK make SERIAL device talk
in: A=device number A - - - - - A - -
$FFB7 READST read I/O status byte
out:A=status byte - - - A - - A - -
$FFBA SETLFS set file parameters
in: A=logical file number A X Y A X Y - - -
X=device number
Y=secondary addr
$FFBD SETNAM set file name
in: A=length of filename A X Y A X Y - - -
Y/X=pointer to name addr
$FFC0 OPEN open log.file after SETLFS,SETNAM
out:A=error# if C=1 - - - - - - A X Y
$FFC3 CLOSE close a logical file
in: A=logical file number A - - - - - A X Y
$FFC6 CHKIN open channel for input
in: X=logical file number - X - - - - A X -
$FFC9 CHKOUT open channel for output
in: X=logical file number - X - - - - A X -
$FFCC CLRCHN restore default devices
- - - - - - A X -
$FFCF CHRIN input character
out:A=character, C=1 and ST=error - - - A - - A - -
$FFD2 CHROUT output character
in: A=character, C=1 and ST=error A - - A - - - - -
$FFD5 LOAD load after call SETLFS,SETNAM
in: A=0 load, a=1 verify A X Y A X Y A X Y
Y/X = dest.addr if sec.addr=0
$FFD8 SAVE save after call SETLFS,SETNAM
in: A=zero page pointer to start.addr A X Y - - - A X Y
Y/X=ending address
$FFDB SETTIM set jiffy clock
in: A=MSB, X=middle, Y=LSB A X Y - - - - - -
$FFDE RDTIM read jiffy clock
out:A=MSB, X=middle, Y=LSB - - - A X Y A X Y
$FFE1 STOP check stop key
out:Z=0 if STOP not used; X unchanged - - - A - - A - -
Z=1 if STOP used; X changed - - - A - - A X -
A=last line of keyboard matrix
$FFE4 GETIN get a byte from channel
out:keyboard:A=0 if puffer empty - - - A - - A X Y
RS232:status byte - - - A - - A - -
serial:status byte - - - A - - A - -
tape:status byte - - - A - - A - Y
$FFE7 CLALL close or abort all files
- - - - - - A X -
$FFEA UDTIM update jiffy clock
- - - - - - A X -
$FFED SCREEN return screen size
out:X=columns, Y=rows - - - - X Y - X Y
$FFF0 PLOT read/set cursor position
in: C=0, X=row, Y=column - X Y - X Y - - -
out:C=1, X=row, Y=column - - - - X Y - X Y
$FFF3 IOBASE returns the addr of I/O devices
out:Y/X=addr($DC00) - - - - X Y - X Y