VeriFone MX800 series Programmer's Manual page 293

Table 35 Packets 09 and 14 Communication Protocol (Continued)
Master Device
02 RAM Test/Continuous
<SI>0102<SO>{LRC}
ACK/NAK/EOT
ACK
ACK/NAK/EOT
03 PROM Checksum Test
<SI>0103<SO>{LRC}
ACK/NAK/EOT
IPP MS
AND
Transmit
IPP
Direction
IPP7
ACK/NAK/EOT
<SI>14RAM TST BEGIN<SO>{LRC}
<SI>14RAM TST OK<SO>{LRC} or
<SI>14BAD RAM<SO>{LRC}
EOT to terminate process.
IPP7
ACK/NAK/EOT
<SI>14xx<SO>{LRC}
where, xx is the one-byte PROM internal
checksum. There are two checksums
inside the IPP:
The PROM checksum, which is 2-bytes
•
long and is located at 7FFE/7FFF. This
checksum is for manufacturing
purposes.
The PROM internal checksum.
•
EOT to terminate process.
X
M 800 S
DUKPT C
OMMUNICATIONS
Common Packets
P G
ERIES ROGRAMMERS UIDE
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ACKETS
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