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CPU
MEMORY
CPU
CPU
IC3
IC5
IC4
Friction Tractor SW
Friction PE Sensor
ON LINE SW
LF SW
Home Sensor
Bottom/Rear PE Sensor
Serial Interface Board Detection
LF Motor Enable
LF Motor Phase
(5) Gate Array Pin Function
The pin functions are as follows.
MATL
TTA
& Fg
GATE ARRAY
A20
H1
| Address
|
A8&
H24
'|
HDCO1
Ad
AD7
| |Aderess/Dat
ADO
| Address
HDCO6
HDCE1
HDCE6
RESET
INTO
ALE
CLK
INT2
RD
LEDD
WR
SCLK
CRTRG
LOLK
OHTRG
EHTRG
HSO
ROM1
HS7
RAM1
STB
RAM2
ACK
BUSY
PE
ERROR
SELECT
AFXT
PRIME
CRA
CRNA
CRB
CRNB
CRCNTO
CRCNT1
CRENBL
>
Head Pin Data (Sink Tr)
=
Head Pin Data
(Odd Common Tr)
Head Pin Data
(Even Common Tr)
output
Carriage
to CPU
————* | LED (Front Panel)
—____
>
P
Apes Parallel Data
+———
Strobe
—-»
Acknowledge
———»
Busy
———->
Paper End
———-»
Error
—-
Select
+—
Auto Feed XT
+———
Prime
——_—_—>
CR Motor Phase
~
————
——_>
——____»>
_Power
—————_—_>
CR Motor
Control
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