Texas Instruments 990 User Manual page 73

JlM _ _ _ _ _ _ _
~
946289-9701
Statistics Display
COMM L
INV
STATI~:TICS
RECEIVE TRANSMIT
1.
00000 00000 BID
2.
00000 00000 BID ACCEPTED
3.
00000 00000 TTD
4.
00000 00000 NAK
s.
00000 00000 WACK
6.
7.
8.
9.
10.
II.
12.
13.
14.
IS.
00000 00000
00000 00000
00000 00000
00000
00000
00000
00000
00000
00000
00000
ENQ
EOT
ACK
CONVERSATIONAL REPLY
RVI
BID OVERRIDE
BID THRESHOLD EXCEEDED
NAK THRESHOLD EXCEEDED
ENC"! THRESHOLD EXCEEDED
IDLE THRESHOLD EXCEEDED
These statistics reference Binary Synchronous Communications procedures. (For an explanation of
these procedures, refer to Ap:-endix F.) These statistics reflect the following information as indicated
by the corresponding numbers.
I. Number of Bl Ds (received/ transmitted). A count of the EJ\'Qs received and sent as a bid
for the use of the communication line.
2. Number of B/Ds accepted (received/transmi11ed). A count of the positive responses
received and transmitted in response to a bid sequence.
Receive
Transmit
Local
Remote Local Remote
BID
BID
ACKO ACKO
3. Number of TTDs (received/transmitted). A count of the TTD sequences received and
transmitted. The
TTD
sequence is transmitted by the transmitting station to indicate that
it is temporarily not ready to transmit. The 2780 Emulator cannot transmit a TTD.
Receive Transmit
Local
Remote
Local
Remote
4 -
Data Data
-+
ACKO
__.
4 -
ACKO
4 -
TTD TTD
---.
NAK
__.
•J--
NAK
4-35
Digital Systems Group