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Page Title:
Computer Memory Characteristics |
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|  MIL-N-81497A(AS)
3.5.5.4 (Continued)
Nomenclature
Quantity
Mother Board
1
Analog to Digital Converter Cards
3
Digital to Analog Converter Cards
2
Memory Module Assembly
1
Interface Assembly Card
3
Input/Output Logic Cards
5
Arithmetic and Control Logic Cards
5
Elapsed Time Indicator
1
Computer Memory Characteristics -
3.5.5.5
The Computer, Navigation shall contain a plug-in memory
(1)
module assembly. The Memory Module shall consist of
magnetic storage cores plus associated electronics,
organized to provide Read/Restore and Clear/Write
modes of operation.
(2)
The memory cores shall be organized into words of
Instruction orders consist of one to
10 bits each.
four 5 bit bytes. Data shall be contained on two
10 bit memory words.
The Computer, Navigation memory core stack shall
(3)
consist of core fields of 512 - 10 bit words each.
one field shall contain 256 - 20 bit addressable
data words which may be read or stored durinq opera-
tion. Another field shall contain 256 - 20 bit constants.
data words which shall only be addressed in Read/Restore
Mode. The other fields shall contain program instructions
which shall only be addressed in the Read/Restore Mode.
The computer memory shall operate at 4 SEC cycle time
(4)
with a 1 SEC access time. When the memory is ac-
cessed, 10 bits are read out in parallel. The usage
of these bits is dependent upon whether they represent
an instruction or data.
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