Texas Instruments 990 Operation Manual page 169

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945255-9701
im
Bit increment used to determine the successive bit
addresses of the bit strings to be used in the
programming cycle for the level specified by
level n. Hexadecimal number.
mm Number of bit strings to be used in the programming
cycle for the level specified by level n. Hexadecimal
number.
dm Initial bit displacement used to determine the starting
bit address of the first bit string used in the
programming cycle for the level specified by level n.
Hexadecimal number.
Parameter default values:
If im is not specified, a value of 0 is used.
If mm is not specified, a value of I is used.
If dm is not specified, a value of 0 is used.
Description: This subcommand is used to specify the PROM or ROM mapping parameters for a
data configuration not defined on the Standard Control Information Cassette or to modify the
mapping parameters of a configuration input from the Standard Cassette. The PROM/ROM data
configuration mapping parameters are explained in paragraph 7.4.4 and Appendix F. The
command parameters im, mm and dm correspond to IRn, MRn and DRn in the computations in
Appendix F.
If two- or three-level data configuration mapping has been used and the user wishes to specify
another data configuration using only level one mapping, the looping parameters for levels two
and three must be reset to the default values. If three-level mapping has been used and the user
is going to specify two-level mapping, the looping parameters for level three must be reset to the
default values. This can be accomplished by entering the RI subcommand and specifying the
level, but omitting the looping parameters. The following command:
.PP,RI,3
resets the looping parameters for level three to allow the user to proceed with level two and one
mapping.
Error message:
PP02 Parameter value is outside the permissible range.
Examples:
.PP,RI,1,4,lOO
.PP,RI,3,1,4,3
7-19
Digital Systems Division .