PRINT MASTER-TO-COMPUTER COMMUNICATION
NOTE: Print Master will provide full duplex communication between a computer and printer which are connected through the unit. This section is applicable only when a device that is connected to a printer port is sending data back to a device connected to a computer port.
When Print Master is sending data to a computer through a computer port and the computer cannot receive any more data, Print Master will expect to see a low on the DTR line. When the computer can receive more data, Print Master will expect to see a high on the DTR line.
If Print Master sees a low on DTR from a computer, the unit will buffer data received by the printer device up to 256 characters. If the buffer fills, Print Master will not handshake with the printer sending data to the computer.
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