Heathkit H9 - SCHEMATIC OF THE HEATHKIT VIDEO TERMINAL MODEL H9

ROM
PROGRAM
444-1.0
1C728
ADDRESS
DATA
Logic
Term
U
AE
az
4o
O-
N
Logic
Term
a-
E<
N
1.
a1
J
.t-
-
-J
'J
U
a)
U
U
N
IO
le
lnput D B Output
I
7 6 5
4
7
7
Pin
#
I4 13 L' LL 10 Pin
#
9
o
5
4 7
0 0 0 0 0 1 !
o 0
0
0 1 r
o o o 0
r
L 1 7 0 0 0
T
t
0 0 0 I 0 0 0 0 0 0 0 L 0
U
0 0 r I 0 L t
0
0
o
L
0
o
0 ! 0 o L
0 o o o o L I
0 0 T u
T
1 7 T 0 0 0 1 L
I 0
I L
0 0 0 0 0 0 0 L 0
0 0 I
r r
0 1 T 0 0 0 L 0
o
7
0
0 0 t
0 o o o 0 L L
0
o o n n
o
n
n n n n n n n n n
o
I 0 L
n
o o o o
o o o n n n
0
n
o n
L 1 1 0 0 O I 1
n n
! o 0 0 o D o
o L o n o o
0
7 0 0 0
0
I 0 0 1 7 I 0 7
L 0 0 o
t o o
0 7 7
o
I
L u 0 o n
0 u T 0
0 n n n n n n
t 0 L 0 0
n n
0 0 L
I
0
a
0
0 o o
o n n n n n n n
n n n n n n
7 L o o 0
o 0 0
L L 0 0
t L 0 0 0 7 I 0 7
I 7 u
7
0 0 o 0 0 o
I
7 u
r
o o o o o D
4
L
L
0 0
0
o I
1
0
n
7 0 I 1 7 n I o 0 1
0 0 D 0 0 o 0 o
1 I
t L L
n n n n o