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p (' () c
f:'~ ~,; ~:) () ('
f1 () d
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0 B '7 / 2 4
I~ev
JAN·_· 0 4--02
4.0
GLOSSARY OF SIGNAL NAMES
This section
lists the signal naMes
used on
the
scheMatic drawings,
fiqur't:·~s
t.n
and
~:.~.O,
along with
i:\
bl'iE~f
de~;cr'ipti()n
of
their
us~?
Note:
an
'N'
prefix
generally
indicates
an
active
low
signal,
otherwise the signal is active high)
a
'T'
prefix or an
'X'
suffix
indicate that the Signal is buffered.
t.a4 MHZ
3. bB 11HZ
60 HZ
t-,I...PHA
BArT+
or'
BATT ....
BEL.L.
HI...
ANI<
Hl..INI(Rt-,TE
CE
( '(:'
,,,,)
CTS
CUR
I>ISHI~(~
DISPOFF
DM
DRCX
The 1.84 MHz datacoMM chip clock
The 3.68 MHz l80A clock
Sets the video fraMe rate, low
=
SO Hz
video dot streaM after dot stretch
con n
E~
c t
:i.
0
n
t () t h
E-~
b
c\
t
tel' y
+
«()
I'
.... )
tel' .".
MinaI for
CMOS
backup during power off
() U
t
p
\J
t
s i 9 n a 1.
t ()
d
l'
i
vet
IH:~
lo:~
y
b
(h:ll'
d b
t:~
11
inhibits the
ALPHA
dot streaM frOM being
sent to the sweep circuitry
alternates at the blinkrate for blinking
character attribute
detects presence of loopback hood
c:l(?ar' ....
to-·~:)~~nd
ofl'OM
host COMputer'
TTL
level clear-to-send
c:
lH' ~. 0
r'
0
u
t
put f r () M
C
F~
T C
inhibit
DMA
blank entire display
detect ModeM connection
clot
r'ate-~
clock
TTL.
level detect ModeM connection
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