Tandy 1000 SL Technical Reference Manual page 64

A d d r e s s
D e s c r i p t i o n
0 3FE Modem S t a t u s R e g i s t e r
B i t
D e s c r i p t i o n
0 Delta C l e a r To S e n d (DCTS)
1 D e l t a Data S e t Ready ( D D S R )
2 T r a i l i n g Edge R i n g I n d i c a t o r
3
Delta Received
L i n e S i g n a l Detect ( I f
B i t
0, 1, 2 ,
'1" = On
"0" =
Off
o r 3 i s s e t t o a
"l",
m o d e m
s t a t u s i n t e r r u p t
i s
g e n e r a t e d )
4 "0"
= Clear To S e n d (CTS)
5 "0"
= Data
S e t Ready (DSR)
6 "0"
= R i n g I n d i c a t o r
( R I )
7
"0" =
R e c e i v e d L i n e S i g n a l Detect (RLSD)
0 3FF R e s e r v e d
53