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Issue
w-cH(Oll
Start 1/0
~
CCW2
I - -
CCWl
Routine
Routine
Unit
~
Select
Routine
I
CCl,AI
Status In
. l
Write
Fetch
End
Update
Routine
Interrupt
Routine
r-
A-clock Sequencing
IDT
14--
A-clock Sequencing
Sequence
CPU Single Step
FIGURE
107.
SELECTOR CHANNEL CLOCK-STEPPING BLOCK DIAGRAM
Addre11
Data
Comments
0078
FF040000
I/O new PSW
007C
00000300
0300
9COOOCUU
SIO--CUUachamiel and uuit addre11
of tcratch tape
0304
47F00304
Unconditional branch to 304
0400
01000501
ccw
0404
20000100
3. Set selector channel display switch to channel
number of scratch tape.
4. Press PSW RESTART and observe that the
scratch tape moves.
Any or all of the five following routines may now be
stepped through. (Make sure the tape is moving as
each routine is started.)
Start
1/0
(CCWl) Routine IOP201
ROS
Chamiel
1. Set ROS addre11 010 in the
storage data keys.
2. Set ROS addreu compare
switch to
STOP.
3. Prea SYSTEM RESET and PSW
RESTART.
010
CCW1, CCO
4. Set rate switch to SINGLE
CYCLE.
s.
Set addre11 key 11
on,
9 and
10 off1 prea ENTER.
6. Prea START.
AAB
7. Prell START.
AAA
CCW1, CCO, AO
8. Set addrea keys 10 and 11 on,
9 off; prea ENTER.
CCWl, CCO, Al
110
(3/71)
Model SO FEMM
CPU Pr acess
CPU Single Step
Action
ROS
Channel
Addreilll
Time
9. Set addre11key10 on, 9 and
11 off; prea ENTER.
CCWl, CCl, CS
10. Set addrea key 11
on,
9 and
10 off; prea ENTER.
CCWl, CCl
11. Prell START.
ABB
12. Pre11 START.
A80
CCW1, cc1, AO
13. Set addre11 keya 10 and 11 on,
9 off; pre11 ENTER.
ccw1, cc1, Al
14, Set addre11 key 10 on, 9 and
11 off; ire11 ENTER.
CCWl, CC2, CS
15. Set all adare11 keys off; pre11
ENTER.
16. Set rate switch to PROCESS.
CCW2 Routine IOP202
ROS
Channel
~
~
-I!!!!!-
1. Set ROS address 030 in the
storage data keys.
2. Set ROS addre11 compare
switch to STOP.
030
ccw2, cco
3. Set rate switch
to
SINGLE
CYCLE.
4. Set addre11 key 11
on,
9 and
10 off; prea ENTER.
s.
Prea START.
A51
6. Prea START.
ADO
7. Prea START.
ABS
ccw2, cco, AO
8. Set addrea keys 10
L
i 11 on,
9 off; pre11 ENTER.
CCW2, CCO, Al
9. Set addre11 key 10
on,
9 and
11 off; irea ENTER.
ccw2, cc1, cs
10. Set addre11 key 11
on,
9 and
10 off; pre11 ENTER.
CCW2, CC1
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