Texas Instruments 990 Operation Manual page 161

~-------
~
945255-9701
Syntax definition:
PP
{t>' ... }
MB
{t>' ... }
<lower bound>
{t>' ... }
<upper bound>
Parameters:
lower bound
upper bound
Byte address of the fIrst byte of the block of
memory which contains the memory data
confIguration. Required parameter. Hexadecimal
number.
Byte address of the last byte of the block of
memory which contains the memory data
confIguration. Required parameter. Hexadecimal
number.
Description: This command defmes the lower and upper bounds of the block of memory which
contains the memory data confIguration. Any hit string to be transferred must be contained entirely in
this specified region. An attempt to reference a bit string out of these memory bounds during a
programming cycle
will
cause an error. The lower bound is used as a starting address for the data
confIguration. When the PROM programmer is loaded, the lower and upper bounds default to 0 and
FFF
16
respectively.
Error messages:
PPO
1
Required parameter missing.
PP04 Invalid address. The upper bound is less than
the lower bound.
Example:
.PP,MB,500,5FF
This command informs the software that the lower bound of the memory data confIguration is 500
16
and the upper bound of the memory data configuration is 5FF
16 •
7.5.3.2 Define PROM/ROM Bounds (RB). The Defme PROM/ROM Bounds command informs the
control software of the lower and upper ROM or PROM bounds to be used;
Syntax definition:
RB
{ t>' ... }
<lower bound> {
t>' ... }
<upper bound>
7-11
Digital Systems Division .