Texas Instruments 990 Operation Manual page 189

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945255-9701
After the memory words have been stored on cassette, they appear as follows:
1280 BNNNNNNNN~ BNNNNNNNNF BNNNPNNNP~ BNNN~NNNPF BNNPNNNPNF BNNPNNNPNF
1286 BNNPPNNPPF BNNPPNNPPF BNPNNNPNNf BN~NNNPNNF BNPNPNPNPF ~NPNPNPNPF
1292 BNPPNNPPNF BNPPNNPPNF BNPPPNPPPF
BN~~PNPPPF
$
A dollar sign
($)
in the first character of a record denotes the end of the dump. The memory
addresses printed are decimal numbers.
8.3.2.2 Compare BNPF Format on Cassette to Memory (C). The Compare BNPF Format on
Cassette to Memory subcommand can be used to verify that the correct data was written on cassette
tape by the D subcommand (paragraph 8.3.2.1).
Syntax definition:
Description: After a memory block is dumped to tape, reposition the cassette assigned to LUNO
7 to the first record and enter the DB command and C subcommand. Each BNPF-formatted byte is
reconverted to hexadecimal and compared to the byte in memory. If the comparison fails, each
byte from the cassette and the corresponding byte from memory are displayed with the
hexadecimal address. Control is returned to the command string processor without printing if no
comparison errors occur.
Error message:
MXOI Unrecoverable I/O error
Example:
DE: C
BE(; ADDf<:=O::.OO
Er·iD
ADD"'= 05IJF
The contents of the tape is compared to memory. The beginning and ending addresses are printed.
Because no compare errors have been detected, nothing else is printed.
DB C
BEl::'
H.[I[lt':= 05
0 0
[0502=1100 M0502=0000 T0503=1100 MIJ~IJ~=~FOO
T0506=3300 M0506=OOOO T0507=3300 MU~lJi=~FOO
T050H=5500 M050A=0000 T050B=5500 MU~U~=~~OO
T050E=7700 M050E=0000 T050F=7700 MIJ~IJ~=~FOO
HiD AfoDR= U5 (IF
8-3
Digital Systems Division .