Texas Instruments 990 Operation Manual page 193

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945255-9701
Error Messages:
DP03
MPOO
MS05
MXOI
Example:
Dump was greater than 256 words. Starting address
is greater than the ending address.
Illegal parameter value. Address was not on word
boundary. D parameter missing. Bit parameter
value is greater than C
1
i; .
Required parameter (other than subcommand) missing.
Unrecoverable I/O error or output cassette not ready.
HL D 5006FE
The cassette has the fIrst four bits of each word, with the bit parameter equal to its default value 0,
of a 256-word block beginning at 500
16
converted to HIGH/LOW format.
HL D 500 5208
The cassette has four bits beginning at bit 8 of each word of a 16-word block beginning at 500
16
converted to HIGH/LOW fonnat. The cassette is fIlled with records of Hs until a 256-word format
has been created.
9.3,.2.2 Compare HIGH/LOW Format on Cassette to Memory
(C).
This subcommand is used to
verify that the correct data was written on tape by the D subcommand.
Syntax definition:
Parameters:
start addr
end addr
bit
C
<start addr>
{t; ... }
<end addr>
[{b' ... }
<bit>]
Address of fIrst word in memory block.
Required parameter. Hexadecimal '
number.
Address of last word in memory block.
Required parameter. Hexadecimal
number.
Starting bit of four-bit string in each word.
The number of the bit position. Hexadecimal
number.
Parameter default value: If the bit parameter is not specifIed, it is set to O.
Description: Each four-bit string on cassette is compared to four bits of binary data in each word of
the designated memory block. If the comparison fails, the addresses and the cassette and memory
data values are printed.
9-3
Digital Systems Division ,