Tandy 1000 HX Technical Reference Manual page 161

• TANDY COMPUTER PRODUCTS
KEYBOARD INTERFACE SPECIFICATION
TANDY PART # 8075D6?
MAY D5> 1786
1. G E N E R A L D E S C R I P T I O N
1.1 T h e Tandy part** B D 7 5 0 6 ? - K e y b o a r d I n t e r f a c e I.C p r o v i d e s
two funct i o n s '
a. Interface b e t w e e n the system I/O bus and k e y b o a r d .
b. F D C support logic that g e n e r a t e s D R I V E S E L E C T S I G N A L ,
MOTOR O N S I G N A L , F D C T E R M I N A L C O U N T , F D C R E S E T and
D M A / 1 .
F i g u r e 1. shows block diagram of K e y b o a r d I n t e r f a c e chip
F i g u r e 2 . shows p i n c o n f i g u r a t i o n of K e y b o a r d I n t e r f a c e
c h i p .
F i gure 1 .
F i gure 2.
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