Spectravideo SVI 318 Service – Technical Manual page 12

PIN:
NAME:
45
46
47
48
GND
49-50
DESCRIPTION:
Buffered
0 MEMORY BANK CONTROL signal.
Pulling
t h i s
of the memory
disables the
sig nal .
Buffered
MEMORY BANK CONTROL signal.
0
Pulling th is
of t he memory
disa bles the
signal.
Buffered
0 MEMORY BANK CONTROL signal.
Pulling
this
of the memory
.
disables t he
i l
s gna
Buffered
MEMORY BANK CONTROL signal.
0
Pulling
this
of
the memory
lower
t he
memory, and
System el
e
2 . 7
signal LOW enables the b
(32K, Addr.-- 8000H-FFFFH),
user RAM on board through
signal LOW enables the b
(32K, Addr,-- OOOOH-7FFFH),
BASH -: ROH on board through
signal LOW enables the b a
(32K, Addr.--8000H-FFFFH)
usser RAH on board through
signal LOW enables
(32K, Addr.-- OOOOH-7FFFFH)
portion of
SVI328 user
disables the BASIC ROM
ctrical ground.
nk 32 p or ti on
a
and
the
nk 31 p or ti on
a
and
the
n
k 22 por tion
and
the
RA M DIS
portion
t bank 21
he
is
whi c h
a l
a ss b e
ddre
on board .