l-l 2 System organization
CPU UEM (NT8D34AAIDC)Table l-4Identification of Single CPU UEMUnit Number- required
per UEM
Common Equipment Power
1
Supply (CE Pwr Sup)
(AC-
NT8D29AB)
(DGNTGD41AB)
CPU function card (QPC579)
1
CPU interface card (QPC580)
1
Changeover and Memory
1
Arbitrator
(WA)
card (QPC581)
Memory cards (QPC583) 2
Mass Storage Interface card
1
(MSI) (QPC584) or Floppy Disk
interface (FDI)
(NT8D68AA):
Segmented Bus Extender (SBE)
15
cards (QPC215)
Clock Controller card (QPC471 or
I
QPC775 international)
Multi-Drive Unit (MDU)
1
(NT8D69AA) or one DTI (Digital
Trunk Interface) card (QPC742)
Bus Terminating Unit (BTU)
2
(QPC477
-A20
or
-A21)
Note: MDU
requires
MS.1
cards;
FDU
requires
FDI cards; MDU
occupies three
slots
in the
UEM, FDI
occupies two.
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