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|  MIL-D-81347C(AS)
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(7) Peripheral equipment senses the Input Acknowlege line.
(8) Peripheral equipment drops the data lines and the Input
Data Request line.
Steps (2) through (8) of this sequence are repeated for every
data word until the number of words specified in the input buffer have been transferred.
Output - The sequence of events for the two methods in which
2.1.4.1.2
outputs can be made from the computer are as follows:
Data Outputs - The computer shall be able to output 30 bit data
2.1.4.1.2.1
words to a peripheral equipment by following the control line sequence below, as illustrated in
Figure 1-5.
(1) Computer initiates output buffer for given channel.
(2) Peripheral equipment sets the Output Data Request line in-
dicating that it is in a condition to accept data.
(3) Computer detects Output Data Request.
(4) Computer, at its convenience, places data on the 30 data
lines.
(5) Computer sets the Output Acknowledge line, indicating that
the data is ready for sampling.
(6) Peripheral equipment detects the Output Acknowledge.
(7) Peripheral equipment may drop `the Output Data Request
any time after detecting the Output Acknowledge.
(8) Peripheral equipment samples the 30 data lines.
(9) Computer drops the Output Acknowledge.
Steps (2) through (9) of this sequence are repeated for every
data word until the number of words specified in the output buffer have been transferred.
External Functions - The computer shall be able to output one
2.1.4.1.2.2
30 bit External Function word to a peripheral equipment by following the control line sequence below,
as illustrated in Figure 1-5.
(1) Peripheral equipment sets the External Function Request
line when it is ready to accept an External Function word.
(2) Computer defects the External Function Request
(3)
Computer places the External Function word on the data
lines (if its External Function buffer is active).
(4) Computer sets the External Function line to indicate that
the External Function word is ready for sampling.
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