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Commodore 8250LP - VIII. INTERFACE; Interface Introduction

Commodore 8250LP
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GV
5V
(NC)
GV
12V
GV
Gi"iD
-HOTOR
ON
TRACK·
ZERO
PH·E
TR..,l"CK·
ZERO
PHC
TR..\CK·
ZERO
LED
K
(KEY)
(NC)
STEPPER
COM
0
STEPPER
CO/>!
1
Sl-ID
-4
S?-ID
-1
S:-ID
-2
Sl-ID
-3
ACTIVITY
LED·..\.
ACTIVITY
LED·K
WRITE·PROTECT.PHE
~~ITE·PROTECT·PHC
I~uLX·SECTOR·PHE
INDLX·SECTOR·PHC
(NC)
I
(NC)
ide
0
GND
tEY)
R/WZ
COMMON
R/Wl
E~ASE
d
e
1
NC
ER.ASe:
R/,N
1
COMMON
R/W2
GNO
P1
..
1
2
3
4-
5
6
7
8
9
10
11
12
13
14-
15
16
17
18
19
20
21
22
23
24
PZ
1
3
5
7
9
1 1
2
4
6
8
10
12
.
(HEn
)
(ORA)
SPINDLE
~!OTOR
(BLK)
CONTROL
PCB
(\,HI)
(\"HI)
(GRN)
r------
--~
~
~
~
r'\
'I
(YEt)
'~'ONll05
l
: t.:1\ :
I
~
!
~--------
-
(RED)
(RED)
fl"I.
(ORG)
r-
----<
-----c
~,
..
-
I
(BUO
I
I
,.-
(BRN)
I
:
STEPPER
~iOTOR
(YEL)
..
I ..........
(GRY)
'-_!V
____
(WHI)
(BLK)
(G&'l
)
(ORG)
(
RED)
Pi
(C:--lT
C:--l)
R/W
I
____
..r.
tCi\
'C)I
,---....
PN1190
ER
CORE
I
~
.~
~------------------~
I
n
R/E
CORE
ER
CORE
J
J
WRT.P.
IND.
LED
LED
-Q-J
PN1184
Side
0
Sid
e 1
P2 (HE.;'O CN)
Fi~.
1
The
Electrical
Interface
Schematic

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