HP 271308 Technical Reference Manual page 86

HP 27130B
17: reserved
18: reserved
19: character handshake timer
20: reserved
21: reserved
22: host interrupt mask, first byte
23: host interrupt mask, second byte
24: host X-ON character
25: host X-OFF character
26: device X-ON character
27: device X-OFF character
28: host ENQ character
29: h09t ACK character
30: host ENQ/ACK counter
31: reserved
32: reserved
33: a single text terminator character
34: number of output separators
35: 1st output
36:
2nd output
37: reserved
38: reserved
39: reserved
40: reserved
41: reserved
separator
separator
42: additional options
character
character
or
or
for echoing CR-LF
null
null
43: replacement character for bad incoming character
4-24