Varian DATA 620/i User manual

DATA 620/i
SYSTEM
REFERENCE
MANUAL .
- --~

DATA 620/i
SYSTEM
REFERENCE
MANUAL
va~ian data machines fa varian subsidiary
.......... 2722 michelson drive/irvine/california/92664/(714)833·2400
C 1968 printed in USA

VDM-3000
Revision A
March 1968

CONTENTS'
Page
SECTION 1 INTRODUCTION
1. 1 General
1-1
1
.2
Specifications
1-2
1.3
Use of this Manual
1-6
SECTION 2 SYSTEM DESCRIPTION
2. 1 Computer Organization 2-1
2.2 Computer Word Formats
2-6
2.3 Computer Options 2-11
SECTION 3 OPERATIONAL INSTRUCTIONS
3. 1 General
3-1
3.2
Sing Ie-Word Instructions 3-1
3.3
Double-Word Instructions 3-31
SECTION 4 INPUT/OUTPUT
SYSTEM
4.1 Introducti on
4-1
4.2 Organizati on
4-1
4.3
Program Control Functions
4-3
4.4 Optional Automatic Control Functions 4-11

Page
SECTION 5
CONTROL CONSOLE OPERATION
5.1
Controls and Indicators
5-1
5.2 Manual Operation 5-1
APPENDICES A
DA TA 620/i Number System A-1
B
Standard DATA 620/i Subroutines
B-1
C
Table of Powers of Two
C-1
D Octal-Decimal Integer Conversion Table
D-1
E
Octal-Decimal Fraction Conversion Table
E-1
F DATA
620/i Instructions (Alphabetical Order)
F-1
G
DATA 620/i Instructions (By Type)
G-l
H DATA
620/i Reserved Instruction Codes
H-1
I
Standard Character Codes
1-1
ii

1.1 GENERAL
SECTION 1
INTRODUCTION
The DATA 620/i is a high-speed, parallel, binary computer.
Its flexible design and modular packaging make it ideal for
operation both as a general-purpose machine and for applica-
tion as an on-line system component. Its features include:
Fast opera tion:
Large
instruction
repertoire:
Word length:
Modu lar memory:
Multiple addressing
modes:
Flexible I/O:
Extensive software:
Modu lar packag ing:
1 .
8-mi crosecond memory cycle.
107 standard, 18 optional; with
approxima te Iy 200 addi ti ona I
instruction configurations which
can be microcoded.
16- or 18-bi t configurations.
4096 word minimum, 32,768 words
maximum.
Direct, indirect, relative, index,
immediate, and extended (optional).
Up to 10 devi ces may be placed on
the I/O bus. The I/O system is
easily expandable to include
features such as automatic block
tra nsfer, priori ty interru pt, and
"cycle-stealing" data transfers.
Complete package includes an
assembler, mathematics and I/O
library, AID diagnostics, and an
ASA FORTRAN subset.
Mounts in a standard 19-inch
cabinet. No special mechanical
or environmental facilities are
required.
The advanced design techniques used throughout the DA TA
620/i system provide solutions to real-time data acquisition,
telemetry processing, process control, and simulation prob-
lems. In addition, the DATA 620/i is well suited for scientific
computations. Special attention has been given to the inter-
fac i ng probl ems usua 1\ y e ncoun tered in integra ti ng a di g ita I
compu ter into a system. As a resu It, the DATA 620/i ca n be
joined to a system with unparalleled efficiency.
1-1

1.2 SPECIFICATIONS
1-2
The unique design of the DA TA 620/i makes it easy to program,
operate and maintain. The entire mainframe includes the
processor, all processor options, and a 4096-word core memory
in a
convenient 10-1/2 inch high rack-mountable package.
Only 17 circuit boards of 11 different types are used in the
basic 16-bit configuration.
Power suppl ies for the processor and up to 8192 words of core
memory are a separate 10-1/2 inch high package that mounts
behind the mainframe. Thus, the entire computer requires
only 10-1/2 inches of a standard 19-inch rack. Installation
is easy, requiring no special mounting, cabling, or air
conditioning provisions.
Maintainability of the DATA 620/i is enhanced by easy front
access to all wiring, making it unnecessary to remove panels
on the computer rack to obtain access to the modu les, con-
nectors, and wiring.
A complete set of software provided with the DATA 620/i
permits rapid preparation of application programs. The system
software includes:
FORTRAN:
DATA 620/i Assembly
System (DAS):
AID:
MAINTAIN:
Subroutine Library:
Subset of ASA FORTRAN.
Two-pass symbolic assembler.
On-line debugging and utility
package.
Complete set of computer and
peripheral diagnostics.
Complete library of transcendental
functions, sing le- and double-
precision and floating-point
ari thmeti c, forma t conversion,
and peripheral service routines.
A wide variety of peripheral equipment is available to provide
the DATA 620/i user with a complete system suited to specific
needs.
Specifications of the DATA 620/i computer are listed in
table 1-1.

Specification
Type
Memory
Arithmetic
Table 1-1. DATA 620/i Specifications
Characteristics
General-purpose digital computer for on-I ine data system
applications. Magnetic core memory: binary, parallel,
single-address, with bus organization.
Magnetic core, 16 bits (18 bits optional); 1.8 micro-
seconds fu II-cycle, 700-nanosecond access time, 4096
words minimum, expandable in 4096-word modules to
32,768 words. Power-fai lure protection optional, non-
volatile. Thermal over-load protection is standard.
Parallel, binary, fixed point, 21s complement.
Word Length
Speed (fetch and
execute)
Add or Subtract
16 bits standard; 18 bits optional.
3.6 microseconds.
Multiply (optional) 16 bits - 18.0 microseconds.
18 bits - 19.8 microseconds.
Divide (optional) 16 bits - 18.0fo25.2 microseconds.
18 bits - 19.8to28.8 microseconds.
Register Change
Input/Output
Registers
A Register
B Reg ister
X Register
1.8 microseconds.
From A or B register - 3.6 micro-
seconds.
From memory
seconds.
- 5.4 micro-
Accumulator, input/output, 16
or 18 bits.
Low-order accumulator, input/
output, index register, 16 or
18 bits.
Index register, multi-purpose
register, 16 or 18 bits.
1-3

1-4
Specifi cati on
Instruction Types
Instructions
Micro-EXEC
(optional)
Table 1-1. (Continued)
P Register
U Register
L Register
W Register
S Register
R Register
Control
Characteristi cs
Instruction counter, 16 or 18 bits.
Instruction register, 16 bits.
Memory address register, 16 bits.
Memory word register, 16 or 18
bits.
Shift register, 5 bits.
Operand register, 16 or 18 bits.
Addressing Modes Six as follows:
Direct: to 2048 words.
Relative to P register: to 512 words.
Index with X register hardware: to 32,768 words (does not
add to execution time).
Index with B register hardware: to 32,768 words (does not
add to execution ti me).
Multilevel indirect: to 32,768 words.
Immediate: operand immediately follows instruction.
Extended: operand address immediately follows instruc-
tion
(optional): to 32,768 words.
Four, as follows:
Single word, addressing.
Single word, non-addressing.
DoubIe word, addressing •
DoubIe word, non-add ressing .
107 standard, approximately 200 microinstructions, plus
18 optional.
Faci I ity and hardware to construct a hardwired program
external to the DATA 620/i. Eliminates stored program
memory
accessing for hardwired programs.

Specifi cati on
Control Panel
Input Output
Data Transfer
External Control
(select)
Program Sense
Interrupts
(optional)
Physical
Characteri stics
Dimensions
Weight
Power
Expansion
Installation
Environment
Table 1-1. (Continued)
Characteri stics
Selectable display and data entry switches, three sense
switches, instruction repeat, single step, run, power
on/off, system reset.
Three types as follows:
Single word to/from memory (program control).
Single word to/from A and B registers (program control).
Optional direct memory access (cycle-steal).
Up to 512 external control lines.
Up to 512 status Iines may be sensed.
Power fai lure, priority interrupts {expandable in groups
of eight} with group enable/disable and individual arm/
disarm. Each interrupt line is associated with a unique
memory location.
10-1/2 inches high, 13 inches deep.
90 pounds, including power supplies.
360 watts, single phase, 115 vac ± 10 vac, 48-62 Hz.
Power supplies are regulated. Additional regulation is
not required with normal commercial power sources.
Mainframe package contains a 4096-word memory, the
processor, and space for processor options. Addi tiona I
memory requires an additional 10-1/2 inches of rack
height for up to 8192 words of additional storage.
Peripheral controllers are mounted external to the main-
frame.
Mainframe and power supply packages require 10-1/2
inches of standard 19-inch racks. No air-conditioning,
subflooring, special wiring, or site preparation is
required.
100C to 45
0
C, 10%to 90% relative humidity.
1-S