| Address | Function
|
|---|
| $F179 | Read byte from
datasette (data files only).
Input: –
Output: A = Byte read.
Used registers: A, Y.
|
| $F1DD | Write byte to datasette.
Input: Carry = 1; A = Byte to write; 0 = End of file.
Output: –
Used registers: –
|
| $F22A | Define datasette as default input.
Input: A = 1.
Output: –
Used registers: A, X.
|
| $F26F | Define datasette as default output.
Input: A = 1.
Output: –
Used registers: A, X.
|
| $F2C8 | Close file on datasette (data file only);
write $00, end of file first. (Must push logical number into stack
beforehands.)
Input: –
Output: –
Used registers: A, X, Y.
|
| $F38B | Open file on datasette (data file only);
display "ILLEGAL DEVICE NUMBER" error code if datasette buffer pointer, at
memory addresses $00B2-$00B3, is below $0200.
Input: –
Output: –
Used registers: A, X, Y.
|
| $F72C | Read header from datasette.
Input: –
Output: X = Header type; Carry = 1 and Zero = 1: Interrupted by Stop key
having been pressed; Carry = 1 and Zero = 0: Interrupted by having reached
end of tape.
Used registers: A, X, Y.
|
| $F76A | Generate and write header to
datasette.
Input: A = Header type.
Output: Carry = 1 and Zero = 1: Interrupted by Stop key having been
pressed.
Used registers: A, X, Y.
|
| $F7D0 | Fetch pointer to datasette buffer.
Input: –
Output: Carry = 0: Pointer below $0200; X/Y = Pointer.
Used registers: X, Y.
|
| $F7EA | Find file on datasette. (Must call SETLFS
and SETNAM beforehands.)
Input: –
Output: X = Header type; Carry = 1 and Zero = 1: Interrupted by Stop key
having been pressed; Carry = 1 and Zero = 0: Interrupted by having reached
end of tape
Used registers: A, X, Y.
|
| $F80D | Increase datasette buffer pointer.
Input: –
Output: Zero = 1: Buffer is full; Carry = 1 and Zero = 0: Buffer overflow
occurred.
Used registers: X, Y.
|
| $F817 | Wait for the PLAY button to be pressed on
datasette.
Input: –
Output: Carry = 1: Interrupted by Stop key having been pressed.
Used registers: A, Y.
|
| $F82E | Detect button presses on datasette.
Input: –
Output: Zero: 0 = No button is pressed, 1 = One or more of PLAY, RECORD,
F.FWD or REW pressed.
Used registers: –
|
| $F838 | Wait for the RECORD button to be pressed
on datasette.
Input: –
Output: Carry = 1: Interrupted by Stop key having been pressed.
Used registers: A, Y.
|
| $F841 | Read block from datasette.
Input: –
Output: Carry = 1 and Zero = 1: Interrupted by Stop key having been
pressed.
Used registers: A, X, Y.
|
| $F84A | Read program file from datasette.
Input: –
Output: Carry = 1 and Zero = 1: Interrupted by Stop key having been
pressed.
Used registers: A, X, Y.
|
| $F864 | Write block to datasette.
Input: –
Output: Carry = 1 and Zero = 1: Interrupted by Stop key having been
pressed.
Used registers: A, X, Y.
|
| $F86B | Write program file to datasette.
Input: –
Output: Carry = 1 and Zero = 1: Interrupted by Stop key having been
pressed.
Used registers: A, X, Y.
|
| $FC93 | Switch off datasette motor; switch screen
back; restore execution address of interrupt service routine from memory
addresses $029F-$02A0.
Input: –
Output: –
Used registers: A.
|
| $FCCA | Switch off datasette motor.
Input: –
Output: –
Used registers: A.
|