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USER
AVAILABLE
PHONE LI NE
'-----1
EXPANSION
SOCKET
OR
4K
PROGRAM
OR
MODEM
S 0
CK
ET
CPU
4K PROGRAM
ROM
128 BYTES
L.LI
Cl Cl
RAM
_J
Vl
0::
I -
0
=>
$:
0
"'
PROGRAM
ROM
4K
Page
5.1
THEORY OF OPERATION
Refer to Pictorial 1 Oas you read the following discussion.
OMA
LOGIC
BUS
CONTROL
CIRCUITRY
8.
B.
B.
B.
8
l
DETACHED KEYBOARD
WITH
ENCODING LOGIC
VIDEO
CHARACTER
RAM
VIDEO
ATTRIBUTE
RAM
PICTORIAL 10
POWER-UP
VIDEO
CONTROLLER
CHARACTER
GENERATOR
z
0
_J
-
0
l -
o::
<I:
I - :::;:
z
0::
Oo
u
w...
SH
I
FT
REGISTER
z
.__ ___ "
ATTRIBUTES
CONTROLLER
ATTRIBUTE
INFORMATION
CRT
DRIVE
CIRCUITRY
CRT
When you turn the power on for your Z-29 Terminal, AC line
voltage
is
applied to the power
supply,
where
it is
converted
into
several
DC
voltage levels. These
DC voltages are
then
fed to
the various components of the Terminal for operation.
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