Genicom MatrixPrinter LA36 User Manual

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5-45

5.4

Firmware Overview

LA36N/LA36W firmware, stored in ROM, is separated into three independent software groups, –– interpreter

control, print control, and base control (Figure 5.43).

Figure 5.43 Firmware configuration

The interpreter control group analyzes the individual command to each emulation. The print group control is the

software module used in common by all emulations in CG control (bit map, scalable), image control, and bar

code pattern generation such as picture drawing. The base control group executes BIOS control for the host

interface, mechanism section, control panel, and memory.

Level 1 interrupt

Level 2 interrupt

Level 3 interrupt

Print
inform-
ation

Print control group

Base control group
(engine and interface control)

Interpreter control group 1

Digital PPL2

IBM Proprinter X24E/XL24E

Epson ESC/P2

Print request,
paper feed request, etc.

Host interface
control, control
panel control

Host

Centronics

RS-423