Tandy 1000 SL Technical Reference Manual page 324

( 5 )
T e r m i n a l s
t o s e l e c t
t h e d e s i g n a t i o n method f o r h i g h / n o r m a l d e n s i t y mode.
These t e r m i n a l s
are
n o t u s e d f o r t h i s FDD a n d t h e y
a r e
f i x e d t o H I G H
l e v e l .
-
W P O o u t p u t t e r m i n a l
T e r m i n a l
t o
o u t p u t t h e WRITE PROTECT
(e)
s i g n a l t o t h e h o s t c o n t r o l l e r .
The
wpo
o u t p u t g o e s t o L O W when t h e FPT s i g n a l from t h e f i l e p r o t e c t
s e n s o r
i s
LOW a n d when t h e DRIVE SELECT
(E)
i n p u t s i g n a l i s TRCX
(LOW).
( 6 )
o u t p u t t e r m i n a l
I n v e r t o u t p u t t e r m i n a l
o f
t h e HD o u t p u t .
T h i s t e r m i n a l i s n o t u s e d f o r
t h i s FDD.
( 7 ) TEST i n p u t t e r m i n a l
T h i s t e r m i n a l
i s
n o t u s e d f o r t h i s FDD.
( 8 ) VCC and GND t e r m i n a l
+5V a n d OV power t e r m i n a l s .
-
2 4 5
-