Excerpted from "TSX-Plus User's Reference Manual"
TSX-Plus is a high performance operating system for Digital
Equipment Corporation PDP-11 and LSI-11 computers, supporting
as many as fourty concurrent time-sharing users. TSX-Plus
provides a multi-user programming environment that is similiar
to extended memory (XM) RT-11.
- TSX-Plus keyboard commands are compatible with those
of RT-11.
- TSX-Plus supports most RT-11 system service calls
(EMTs).
- Most programs that run under RT-11 will run without
modification under TSX-Plus. This includes RT-11
utility programs such as PIP, DUP, DIR, LINK, and
MACRO.
- TSX-Plus uses RT-11 XM version device handlers.
- TSX-Plus provides PLAS extended memory services such
as virtual overlays and virtual arrays, as well as
support for extended memory regions.
TSX-Plus can simultaneously support a wide variety of jobs
and programming languages includinf COBOL-Plus, FORTRAN, BASIC,
DIBOL, Pascal, C, MACRO, IND, TECO, and KED. TSX-Plus is used
in education, business, scientific, and industrial
environments. It can concurrently support commercial users
doing transaction processing, engineering users performinf
scientific processing, system programmers doing program
development, and real time process control. Numerous software
packages compatible with TSX-Plus are available from other
vendors.
TSX-Plus supports RT-11 system service calls (EMTs) as its
basic mode of operation. The result is low system overhead and
substantially improved performance over systems that emulate
RT-11 services. TSX-Plus overlaps terminal interaction time,
I/O wait time, and CPU execution time for all jobs on the
system.
In addition to the basic RT-11 functionality, TSX-Plus
provides extended features such as: process windows; shared
file record locking; inter-job message communication; program
performance monitoring; command file parameters; logon and
usage accounting; directory and data caching; multitasking;
and system I/O buffering.
TSX-Plus will run on any PDP-11 or LSI-11 computer with
memory management hardware and at least 128Kb of memory. The
system must also have a disk suitable for program swapping (the
swapping disk can be used for regular file storage as well).
Time-sharing lines and serial printers may be connected to the
system through DH(U,V,Q)-11, DL(V)-11, or DZ(V)-11
communication devices. Both hardwired and dial-up time-sharing
lines are supported by TSX-Plus.
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