Texas Instruments 990 User Manual page 225

TX5 System Generation'
Appendix C
Generating a TX5 Operating System
C.l GENERAL
This appendix describes the procedures necessary to generate a
TX5 operating system for use as a secondary station in the DXlO
HDLC Communications Package. Secondary TX5 operating systems
must be generated at the DXlO primary station by executing the
appropriate GENTX5 utility. Individuals responsible for TX5
system generation should refer to the TX5 Operating System
Programmer~s
Guide to become familiar with the process before
attempting to perform the system generation required to include
the communications package.
The communications register unit (CRU) address for the local-line
module (LLM) in the secondary station must be >20 if the
secondary operating system is to be downloaded from the primary
station. Also, LUNO >CO must be assigned to the LLM board and
must not be assigned to any other device. '
If the secondary station is equipped with a ROM communications
loader, the following applies for the 990/5 computer:
Load Priority:
1 -
MDU
2 - TILINE Diskette Drive
3 -
LLM
If remote SCI is to be included in the TX5, the remote SCI
generator program (LREMSCI) must be executed before the operating
system is generated. LREMSCI produces a link control stream that
is executed with the Link Editor. The object file specified in
the link edit process is then included in the TX5 link control
stream (see Section 3 of this manual).
It is possible to include both the operator communication package
(OCP) and remote SCI (REMSCI) in a TX5 secondary station. If
REMSCI is required but OCP is not, include the REMSCI log task
and the dummy log device service routine (DSR). In this case,
the TX5 warm start and diagnostic messages are directed to the
PXlO system log.
2270526-9701 C-l