Use Of This Manual - Varian Data 620/i System Reference Manual

Specifi cation
Logic and Signals
Software
DAS Assembler
FORTRAN
AID
MAINTAIN
Subroutines
1.3
USE
OF THIS MANUAL
1-6
Table 1-1. (Continued)
Characteri sti cs
The logi c of the computer uti I izes DTL and TTL integrated
circuits employing 5-volt levels. The logic levels on
the transm ission buses (I/O bus, interrupt bus, etc.) are
a I so +3 v to reduce cross ta I k and current requi rements.
Internal logic conventions are 5 v for logical 1, and 0 v
for logical
O.
Logic conventions on the buses are +3 v
for logical 0, and 0 v for logical 1.
Modular two-pass symbolic assembler which operates within
the base 4096-word memory.
It
inc
I
udes 17 basi c pseudo-
ops. The 8192-word memory version includes over 30
pseudo-ops for programming ease.
Modul ar one-pass compi leri subset of ASA FORTRAN for
8192-word memory.
Program analysis package which assists programmers in
operating the machine and debugging other programs.
Includes basi c operationa
I
executive subroutines.
Modular, two-mode diagnostic package which provides fast
verifi cation of central processor and peri pheral operation,
and assists in isolating and correcting suspected faults.
Compl ete
I
ibrary of basi c mathemati ca
I,
fixed- and
floating-point, single- and double-precision, number
conversion and peripheral communication subroutines
plus provisions for adding appl i cation-oriented routines.
This manual provides the basic information required for
programming and using the DATA 620/i, and is intended to
be used in con junction with other publ i cations for the 620-
series computers. These publications are I isted in table
1-2.
The interface reference manua
I
provides detailed informa-
tion for integrating the DATA 620/i with special system
components.