Texas Instruments 990 Operation Manual page 52

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945255-9701
Description: PROMPG consists of an overlay module and a memory extension module. The over-
lay module is loaded into the monitor transient area, and the memory extension module is loaded
into the highest numbered address locations of user memory.
When the PL command is issued, the overlay will be loaded and the following printed:
PP
PS
The memory extension will then be loaded into user memory at the specified bias address.
If the user attempts to enter a command before the memory extension module has been loaded,
error message LDOO will be printed. This may occur even though the overlay module load has
been indicated by a printout.
Error messages:
LDOO
LDOI
Examples:
.PL 8
PP
PS
Invalid tag or I/O error. Reenter the command. If the
error persists, the tape may be bad or not
readied.
Invalid LUNa. Reenter the command.
The PROM programmer module is loaded from the device assigned to LUNa 8. After the overlay
resident module is loaded, PP and PS are printed. The memory extension module is then loaded
into the top of user memory.
3.4.6 LINK AND LOAD PROGRAM (LL). The Link and Load Program (LL) command starts
up the relocating linking loader, PX9LAL. PX9LAL must be loaded into the transient area with
the OV command before executing the LL command.
Syntax definition:
LL
The command is terminated by a carriage return.
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Digital Systems Division