S Registers
37
S23
Bit-mapped. Storable.
Bit 0. Detect RDLB (&T4 and &T5 CMD)
■
0 = Deny RDLB (&T5 CMD)
■
1 = Accept RDLB (&T4 CMD)
Bit 3,2,1. DTE port communications speed (bits/s)
■
0 = 300
■
4 = 4800
■
1 = 57600
■
5 = 9600
■
2 = 1200
■
6 = 19200
■
3 = 2400
■
7 = 38400
Note: bits 3,2 and 1 of S23 are only valid if bits 3,2 & 1 of S19 = 0.
Bit 5,4. Parity
■
0 = Even
■
2 = Odd
■
1 = Space / none
■
3 = Mark
Bit 7,6. Guard Tone (&G CMD)
■
0 = None
■
2 = 1800 Hz
■
1 = 550 Hz
■
3 = Not used
