Prom Programmer Functions; Prom Programmer Loading Procedure; Prom Programming Process - Texas Instruments 990 Operation Manual

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7.2.4 PROM PROGRAMMER FUNCTIONS. The PROM Programmer software package allows
the user to perform one or more of the following functions simultaneously:
• Perform one of three data transfers:
(1)
Program PROMs.
(2) Read PROM or ROM data into memory.
(3) Store nonstandard memory and PROM control information on the Standard
Control Information Cassette.
• Display data from memory.
• Display data from PROM or ROM.
• Compare data in memory and PROM or ROM.
The functions to be performed during the programming cycle may be specified with the TS
subcommand before the programming cycle is initiated.
7.3 PROM PROGRAMMER LOADING PROCEDURE
The Program, PROMPG, consists of an overlay module and an extension which is loaded into the
top of user memory. PROMPG is loaded by means of the Load PROM Programmer (PL)
command, which is described in detail in Section III.
Mount and position the cassette containing the PROMPG object code and enter this command
on the terminal keyboard:
PL
{o' ... }
[<luno> [{ 0' ... } <bias>]]
where luno is the logical unit number of the cassette drive on which PROMPG is mounted and
bias is the load address for the extension. The default LUNO value is 7. If the bias is not given,
the PX9MTP loader loads the extension into the top of user memory at default bias lC80
16 •
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.
7.4 PROM PROGRAMMING PROCESS
"The PROM programming process allows the user to transfer data from memory to a PROM or
vice versa and to display or compare memory and PROM/ROM data. To accomplish these tasks,
certain control information must be specified. The information includes memory and PROM/
ROM bounds, bit string width, PROM/ROM characteristics, and mapping parameters. The control
information may be specified using the PROM programmer keyboard commands and/or by
reading in the information from the Standard Control Information Cassette.
Digital Systems Division "