Tandy 1000 SL Technical Reference Manual page 289

E r a s e c u r r e n t i s c a l c u l a t e d f r o m t h e f o l l o w i n g e x p r e s s i o n . E r a s e
c u r r e n t i s n o t s w i t c h e d d e p e n d i n g o n t h e t r a c k p o s i t i o n .
- -
SFO, SF1
s i g n a l s
I
Models a n d t r a c k p o s i t i o n
1
T r . 0 0 ~ 2 1 T r . 2 2 ~ 3 9 Tr.00-43 Tr.44%79
,
Y
T
H L H
S w i t c h f i l t e r
Write
c u r r e n t s w .
( C u r r e n t
exp.
)
ON
OFF ON OFF
No.1
No.
2 No. 1 No. 2
I
E r a s e d r i v e r
I
( C u r r e n t e x p
.
( T a b l e 201) S w i t c h i n g f u n c t i o n f o r read write c i r c u i t
-
210
-