Ppendix – Zilog Z80195 User Manual
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Introduction
The Z80185/195 Development Kit includes device drivers software that supports the serial or P1284
Centronics ports. The software is structured as modular libraries so that you can use only those pieces
actually needed. A brief description of the software follows. (Refer to the Z80185/195 Device Drivers
User's User's Manual, which is included in this kit.)
ASCI UART Driver
The ASCI UART serial driver supports the new, higher bit rates of the Z80185/195’s enhanced ASCI
serial port as well as the improved parity and data width features, which provides a high-speed serial
interface to the system. It supports the port either on a character-by-character basis or with the use
of a DMA channel. In addition, it supports the following standard RS-232 flow control protocols:
■ XON/XOFF
■ CTS/RTS
P1284 Centronics Drivers
The P1284 driver uses the Z80185/195’s P1284 hardware to implement either the host or printer side
of this emerging IEEE standard. It deals with all of the signaling required to change from one mode
to a different mode within the P1284. The characteristics of the P1284 drivers can be summarized as
follows.
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