TA Triumph-Adler CLP 4532 - Manual (Page 114)

Computer Interface
4-8
H4: Parity
The factory setting is 0 (none).
H5: Protocol logic
The factory setting is 0.
H6: Buffer nearly-full threshold
A percentage value from 0 to 99. The factory setting is 90.
H7: Buffer nearly-empty threshold
A percentage value from 0 to 99. The factory setting is 70. The factory settings of the buffer
nearly-full and nearly-empty thresholds (H6 and H7) are subject to change without notice.
The difference between the nearly-full and nearly-empty thresholds allows the computer to send a
fairly large amount of data in a continuous stream.
H8: Received data buffer size
The input buffer size is specified in increments which vary depending on the S5 parameter. When
S5 is 0, the increment is 10 KB. When S5 is 1, the increment is 100 KB. When S5 is 2, the
increment is 1024 KB. The factory setting is 12 (1200 KB, S5=1).
PRESCRIBE FRPO D0 Command
The PRESCRIBE FRPO D0 command is provided to allow manipulating XON/XOFF when an error
has occurred on the serial interface. The following table summarizes the error status corresponding
to different D0 values.
Parameter value Baud rate
0 None
1 Odd
2 Even
3 Ignored
Parameter value Baud rate
0 Combination of DTR (positive logic) and XON/XOFF
1 DTR (positive logic)
2 DTR (negative logic)
3 XON/XOFF
4 ETX/ACK
Timing of XON transfer to host while
Ready or Waiting Serial interface error
error not handled error handled
XON sent every 3-5 seconds D0=0 (default) D0=1
XON not sent D0=10 D0=11