Tandy 1000 SL Technical Reference Manual page 156

PIN
NAME
PE
PIN NO.
4 3
DRIVE
TTL i n
DESCRIPTION
P r i n t e r paper e m p t y
i n p u t .
SLCTIN-
BUSY-
FAULT-
DT
R-
5 3
4 2
54
36
TTL i n
TTL i n
TTL i n
2 mA
P r i n t e r s e l e c t i n p u t .
P r i n t e r b u s y i n p u t .
P r i n t e r f a u l t i n p u t .
RS232 d a t a t e r m i n a l r e a d y
o u t p u t .
RTS- 3 3 2 mA
RS232 r e q u e s t t o s e n d
o u t p u t
.
o u t p u t
.
RS232 r i n g i n d i c a t o r
i n p u t .
RS232 t r a n s m i t d a t a
34 2
mA
TXD-
R I -
29
TTL i n
DCD-
30
TTL i n RS232
c a r r i e r d e t e c t
i n p u t .
DS R-
28
TTL i n RS232 d a t a s e t r e a d y
i n p u t .
CTS-
32
TTL i n RS232
c l e a r t o s e n d
i n p u t .
RS232 r e c e i v e d a t a i n p u t .
TTL i n
RXD- 3 1
3