Prom Programmer (Pp) - Texas Instruments 990 Operation Manual

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In this example, the PROM display toggle is set. When the programming cycle is initiated, the
PROM/ROM region defined by the mapping parameters is displayed. The mapping parameters are
defined with initial displacement set to 0, bit increment set to 4, and number of iterations set to
10
16 ,
The bit string width is set to 4 .
. PP,TS,O,O,l,l
• PP';::;O
>i10000.00=0:3
:>
11 0 (108 • 00= 04
>i'1000A.00=02
>i10022.00=0;:
>110042.00=05
1":0000.00=01
1":0004.00=00
1":0005.00=00
1":0011.00=08
1":0021. 00=04
In this example, the transfer toggle is set to program PROM from memory and the compare·
toggle is also set. When the programming cycle is initiated, one bit string at a time will be
transferred from memory to PROM until the mapping parameters have been satisfied. After each
string is transferred, the value is read back from PROM and compared to the memory bit string.
In this example, some compare errors were found during the cycle and the corresponding
memory and PROM contents were displayed.
pp ,
rs:,
I), I),
2, 1
.PP,(;O
In this example, the transfer toggle is set to load memory from PROM or ROM and to compare
memory to the PROM or ROM. No compare errors were found in this example.
7.5.3.5 Go (GO). The Go subcommand initiates the programming cycle specified by the Set
Toggles (TS) subcommand.
Syntax definition:
PP
{t; ... }
GO
Description: When the GO subcommand is entered, the memory and PROM/ROM control
information is checked, and the programming cycle defined by the toggles is initiated. The
PROM programmer software initiates no transfer of data until this subcommand is entered.
Error messages:
MXOI
PP02
PP03
Tape I/O error, or unrecoverable I/O error.
Mapping parameters specified a bit string out of the
defined memory or PROM/ROM bounds. An example
is an attempt to program 512 words of a PROM
with the PROM boundaries indicated as 100
16
through IFF
16
(256 words).
The bit string width parameters for memory and PROM or
ROM do not match, or the total number of bit strings in
the PROM/ROM and memory data configuration defined
by mapping parameters do not match. An example is an
attempt to map a PROM data configuration containing
256 bit strings from a memory data configuration 512
bit strings.
7-16
Digital Systems Division