Printed Circuit Boards; Cpu Board - Data General NOVA 4/S Manual

Data General Corporation (DGC) has prepared this manual for use by DGC personnel and customers as a guide to the proper installation, operation, and
PRINTED CIRCUIT BOARDS
While most NOVA 4/S and 4/X computers consist of a
variety of printed circuit boards, two basic types of
boards comprise the core of NOVA 4/S and 4/X
computers: the CPU and memory (dynamic RAM). An
optional floating point unit board is available with
16-slot configurations.
Figures 1.6 and 1.7 show the slot assignments for each
board in the 16-slot chassis and the 5-slot chassis,
respectively.
16
13
12 1/0
11 MEMORY OR 1|/O
9
8
7
6
5
4
3 MEMORY OR 1|/O
2 MEMORY OR FPU
DG-05966
Figure 1.6 SLOT ASSIGNMENT DIAGRAM, 16-SLOT CHASSIS
Figure 1.7 SLOT ASSIGNMENT DIAGRAM, 5-SLOT CHASSIS
CPU Board
board only. Both boards may contain the multiply and
divide option.
The basic CPU board contains:
e Full-duplex,
CPU
The CPU is a 16-bit microprogrammed processor, which
It operates in two modes: run and console.
On power up or after a power fail when battery
e Exercises basic CPU functions