beautypg.com

Overview, Programmer's guide pcos series 150 communications – Star Micronics 150 User Manual

Page 117

background image

Programmer's Guide

PcOS Series 150

Communications

Overview

12/14/99

Rev G

Page 107

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

Printer to cash

drawer

Host to printer link

Cash

drawer

Keypad

Host to
keypad

Printer

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

Data to printer

Status and flow control back

Printer

Figure 16 Host to printer link