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4-56.
MCV PCA 30003-60007
Maintenance Procedures
4-57.
ENABLE. The ENABLE signal is used to establish priority for accessing the CTL bus. The
insertion of jumpers WI through W4 establish the priority of the MCU PCA.
4-58.
READY. The READY signal is used to signify that a module is ready to communicate with
memory. The insertion of jumpers W5 (READY 4) through W7 (READY
6)
determine which READY
line is assigned to the MCU PCA.
4-59.
CPU NUMBER.
The system has the future capability of having two CPU(s installed.
When two CPU's are installed, each is assigned a number determined by inserting jumpers WI0 or
Wl1. In a one CPU configuration, the CPU is designated as number 1.
4-60.
CPU MODULE NUMBER. The CPU connected to the CTL bus is assigned a module
number between 4 and 6 by insertion ofjumpers W13 and W14. The module number 5 normally will be
assigned to the CPU.
4-61.
MCU RESET.
In a single CPU configuration, jumper W8 is removed, see figure 4-10.
In a dual CPU configuration, the capability of having one CPU reset the other CPU is obtained by
inserting jumper W8.
TOP 1 , 3 , - · - - - - - - - - - - - .79
BOTTOM 2, 4, •
• 80
P1
1 , 3 , - · - - - - - - - 7 9
2,4, •
• 80
W8 •
W9 •
W10 •
W11 •
W12 •
W13 •
W14 •
•
MCU RST
•
CPU 1
•
CPU 2
•
CPU
: } MODULE
NUMBER
MODULE NUMBER
W13
=
5
W14
=
S
NO JUMPERS
=
4
MCU PeA
30003-60007
W1 •
W2·
W3 •
W4.
W5·
WS·
W7.
J
ENABLE
:} READY
7.522-24
J1
TOP 2,4, •
BOTTOM 1 , 3 , - · - - - - -
J2
2,4, •
50
1 , 3 , - · - - - - - · 49
J3
2,4, •
50
1 , 3 , - - - - · 49
DEC 1976
Figure 4-10. MCU PCA Jumper Locations
4-19
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