IBM Series 1 - Page 19

Figure 2-1.
~~liic~ GrouE 21 Sig.!!E:l Li~
Address bus bits
Address bus bit
Data bus
Address gate
Address gate return
Service gate
00--15
16
service gate return
Condition code in bus
Cycle input indicator
Cycle byte indicator
Stat us bus
Data strobe
Initiate IPL
IPL
Halt or MCHK (machine check)
System reset
Power on reset
Total number of lines
Direction
<------)
-------)
(--_._--)
-----_._)
<_. __ ._---
._------)
(-------
(-------
(-------
(-------
_._-----)
--_._---)
._------)
(-------
-------)
._------)
-------)
No. of 1ine,2
16
1
18
1
1
1
1
3
1
1
4
1
1
1
1
1
1
54
The signal lines associated with the poll group are listed
inP'igure 2-2.
Figure 2-2.
Pol! §£Q~£ Q! Signal 11~~§
Signal ngme _________ _
Request in bus
Cycle steal request in
Poll identifier
Poll
Poll prime
Poll propagate
Poll return
Burst return
<------
(---_._-
------)
------)
------)
------>
<------
<------
No. of line§
16
1
5
1
1
1
1
1
Total number of lines 27
2-4 GA34-0033
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