Texas Instruments 990 Operation Manual page 66

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~ ~45255-9701
MS05 Required parameter not entered. Reenter the command with
the parameter.
MXOI Unrecoverable I/O error.
Examples:
.DP 1000,1030,1004,DUMPIT
.. DP 1000,1040
In the first example, the bytes from location 1000
16
up to and including 1030
16
are dumped.
The entry point is 1004
16 ,
and the name of the program is DUMPIT. In the second example, no
name or entry point was specified when the memory area was dumped. In both examples,
because P is not specified, the end-of-module tag and the
end-of~fi1e
marker will be written.
3.4.8 LOAD PROGRAM IN COMPRESSED ABSOLUTE FORMAT WITH VPFRONT LOADER
(LU). The Load Program in Compressed Absolute Format with Vpfront Loader (LV) command
initiates a load of absolute code.
Syntax definition:
The command is tenninated by a carriage retum~
Parameters:
luno Logical unit number of the input device.
bias Base address of the relocatable upfront loader.
Parameter default values:
If the logical unit number is not specified, a value of 7, nonnally assigned to tape cassette CS 1,
is used.
If the bias address is not specified, the upfront loaderis loaded at a location I BO
l6
bytes below
the beginning of the monitor.
Description: Compressed absolute format code may be loaded by including a short loader (called
an upfront loader) at the beginning of the code.
The upfront loader is IBO
l6
bytes of relocatable code, in standard 990 object code module
format, placed in front of a load module of compressed absolute format code in order to reduce
the loading time. Executing the LV command causes the upfront loader to be loaded by the 733
ASR ROM loader. After the upfront loader is memory resident, control is passed to
it
and the
compressed absolute load initiated. When the user program is loaded, the program entry point is
placed
in
the user's PC register and control is returned to the command string processor. The
user must be careful to put the upfront loader at a position in the user memory where it
will
not be overlayed by the program being loaded.
3-28
Digital Systems Division