Base Configuration
98750
Configuration 3-1
Chapter 3
Configuration
The following assemblies must be installed
in
the 9845B base to support the98750A.
09845-65517
1818-0831
and 1818-0835
09845-66503
Graphics
ROM
Mainframe
ROM
for Graphics
ROM
Mainframe
ROM
for Graphics
ROM
Alpha Control Assembly
Refer tothe 9845BBase CE Handbook Chapter for the locations of these parts.
Interfacing
The 98750A interfaces to the 9845B base via the Alpha Control Assembly (09845-66503)
and
the Graphics Interface Assembly (09845-66504). Alpha information
is
stored
in
block 0 read-
write memory, and
is
refreshed to the display via the
IDA
bus. Graphics information
is
transfer-
red via the
110
bus to the display, where
it
is
interpreted
and
entered into the display memory.
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