User`s manual

DIGITAL-LOGIC AG MPC40/A/B/C, MPC41 Manual V1.4C

4.8 Serial- and Parallel Interfaces

4.8.1 Serial – Interface:

The serial channels are fully compatible with 16C550 UARTS. COM1 is the primary serial port, and is sup-

ported by the board's ROM-BIOS as the PC-DOS 'COM1' device. The secondary serial port is COM2; it is

supported as the 'COM2' device.

Standard: COM 1/2: 16C550: 2 x 16C550 with 16 Byte FIFO

The serial ports are interafced with a RS232C transmitter/receiver. As option the RS232C may be replaced

with a RS422 or RS485 transmitter.

4.8.2 Parallelport - Interface:

A standard bi-directional LPT port is integrated into the MICROSPACE PC, with DMA7 support.

Further information about these signals is available in numerous publications, including the IBM technical

reference manuals for the PC and AT computers and from some other reference documents.

The current is: IOH = 12mA IOL = 24mA