Assembler Operation; Input And Output - Texas Instruments 990 Operation Manual

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reassigned to another device. Examples of other acceptable load program commands are the
following:
LU,7 Load program from LUNO 7.
LU 8 Load program from LUNO 8.
The user then enters the Execute User Program Directly (EX) command to begin execution of
PX9ASM.
5.4 ASSEMBLER OPERATION
The following paragraphs discuss input/output and use of the assembler.
5.4.1 INPUT AND OUTPUT. PX9ASM accepts tapes containing Model 990 Computer/TMS9900
Microprocessor Assembly Language source statements as input. The source tapes may be gener-
ated with the Text Editor (PX9EDT). PX9ASM assembles the source lines generating an output
listing of the assembled source and object code and a cassette tape object file which may be
loaded by the relocating linking loader (LL commjmd of PX9MTP).
If
no linking is necessary,
the LP command may be used to load the object.
PX9ASM accepts input source from logical unit number 7, outputs the listing to logical unit
number 6, and outputs the loadable object to logical unit number 8. Under PX9MTP, the
following default logical unit number assignments have been made.
Logical Unit Number
6
7
8
Device
LOG
CSt
CS2
If other assignments are required, the Assign LUNO (AL) command of PX9MTP should be used.
For example, to assemble a source tape with no printed listing, the user should assign LUNO
6
to DUM, the dummy device. The error messages will continue to be· printed.
5.4.2 PX9ASM OPERATIONAL MESSAGES. When PX9ASM is started, it prints a series of
messages requesting user responses. The first two messages are printed the first time PX9 ASM is
executed after being loaded. In subsequent executions and when restarting PX9ASM, the first
two messages will not be printed.
The first of these messages is as follows:
PX9ASM PART
#
REV DATE
This message identifies the program name and release information.
The second message is:
ADD 4K MEM BLOCKS CONFIGURED?
5-2
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