IBM 4840-563 System Reference Manual page 66

Cash drawer commands
This section describes the following cash drawer commands: v Open Cash Drawer 1 v
Open Cash Drawer 2 v Close Cash Drawer 1 v Close Cash Drawer 2
Open cash drawer 1
To open cash drawer 1, use the following command, which sends an ASCII Bell
character to the customer display serial port:
Open cash drawer 2
To open cash drawer 2, use the following 2-command sequence, which sends an
Escape character followed by an ASCII Bell character to the customer display serial
port:
Status cash drawer 1
To obtain status information for cash drawer 1, use the following command, which
sends an ASCII Ack character to the customer display serial port. See "Cash drawer
status information" for a description of the cash drawer status byte.
Status cash drawer 2
To obtain status information for cash drawer 12, use the following 2-command
sequence, which sends an Escape character followed by an ASCII Ack character to
the customer display serial port. See "Cash drawer status information" for a description
of the cash drawer status byte.
Cash drawer status information
To obtain status information for a cash drawer, send one of the status commands just
described. The status byte returned indicates one of the following:
MSR data received
This section describes the data received from the MSR when a card is swiped. The
MSR is an input-only device, and therefore does not use commands. The JUCC MSR
attaches to a serial port as a standard RS-232 device. The 3-track MSR has a slide
switch, which enables you to connect it either as a standard RS-232 serial device or
through the keyboard interface. (If you choose the latter connection, the incoming data
appears to come from a keyboard so no device driver is needed.)
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