44 lines
2.1 KiB
Plaintext
44 lines
2.1 KiB
Plaintext
┌───────────────────╖
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│ 1.CONSTANT FIELD. ║
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╘═══════════════════╝
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Includes:
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D - constant;
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OED - allow issue of the constant.
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┌─────────╖
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│ Field D ║ CONSTANT.
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╘═════════╝ ────────┘
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Purpose.
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1) Lowest 12 digits are used to shape the addresses
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transition worked out from MCU. The given digits
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constantly enter on bus of the branching address if in
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result of performing the command in MCU (chip BY4) is
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formed a signal PE=0;
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2) All 16 digits can be used to assign the constants,
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which under signal OED=0 control can be issued on
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system data bus. This particularity allows:
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- first, reduce digits of ROM MI(the microinstructions)
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to account of the joining by flap;
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- secondly, enables to load the necessary constants,
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masks etc. in any device, connected to system data bus.
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The note. Values are entered in hex code.
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After entering the new command zero constant became assign.
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┌────────╖
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│ OED ║ ALLOW THE ISSUE OF THE CONSTANT ON ADDRESS BUS.
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╘════════╝ ─────────────────────────────────────────────────────┘
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Purpose.
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The Permit of the issue all sixteen digits of the
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field D on system data bus. Setting of given signal in
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zero condition forms on system data bus condition of
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constants of the field D. .
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Level : 0 - Active (the issue resolved);
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1 - Passive (the issue prohibited).
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The note.
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Values are entered in binary code(value 0 or 1).
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After entering the new command issue constants from
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MIM on data bus is prohibited.
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