Communications Protocol And Print Buffers; Overview; Figure 15 Typical Pos System; Figure 16 Host To Printer Link - Ithaca 150 Programmer's Manual

Programmer's Guide
Chapter 10:
Communications Protocol and Print
Buffers

Overview

The following figure illustrates the communication flow from the host computer to the printer and
from the printer to the cash drawer.
Host
computer
Host to
keypad
Keypad

Figure 15 Typical POS system

For the host to printer communication link, the Series 150 Printer supports serial or parallel
communications. The serial and parallel port both follow standards developed for the personal
computer environment.
Host
Computer

Figure 16 Host to printer link

12/14/99
PcOS Series 150
Host to printer link
Data to printer
Status and flow control back
Rev G
Communications
Printer
Printer to cash
drawer
Cash
drawer
Printer
Overview
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