Ps/2 Mouse Interface (Optional); Line Printer Port Lpt1; Serial Ports Com1-Com2 - DIGITAL-LOGIC MICROSPACE PC/104 Technical User's Manual

DIGITAL-LOGIC AG
4.3.2

PS/2 Mouse Interface (optional)

PS2 Mouse needed.
These signals are available on the utility connector (J5).
J5 Pin
Pin 1
Pin 3
Pin 5
Pin 7
Pin 9
4.3.3

Line Printer Port LPT1

A standard bi-directional LPT port is integrated in the MICROSPACE PC.
Further information about these signals is available in numerous publications, including the IBM tech-
nical reference manuals for the PC and AT computers, and from some other reference documents.
The current is: IOH = 12mA
4.3.4

Serial Ports COM1-COM2

The serial channels are fully compatible with 16C4/550 UARTS. COM1 is the primary serial port, and
is supported 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. However, it is possible to disable either one or both serial
ports using the DIGITAL-LOGIC AG BMP utility. (Note: if you disable the primary port and enable the
secondary port, then the secondary port is installed as COM1 by DOS.)
Standard: COM 1/2:
Serial Port Connectors
Pin Signal
Name
COM1, 2
1 CD
2 DSR
3 RXD
4 RTS
5 TXD
6 CTS
7 DTR
8 RI
9 GND
The serial port signals are compatible with the RS232C specifications.
MSCLK =
MSDATA =
Signal
= Speaker Out
= Reset In
= Keyboard Data
= Ground
= PS/2 Mouse Clock
IOL = 24mA
82C721 (C&T):
Function
Data Carrier Detect
Data Set Ready
Receive Data
Request To Send
Transmit Data
Clear to Send
Data TerminalReady
Ring Indicator
Signal Ground
Clock signal for the PS/2 mouse
Data signal for the PS/2 mouse
Pin Signal
Pin 2 = Ground
Pin 4 = VCC
Pin 6 = Keyboard Clock
Pin 8 = Ext. Battery
Pin10 = PS/2 Mouse Data
2 x 16C450 compatible serial interfaces
in/out DB25 Pin
in 8
in 6
in 3
out 4
out 2
in 5
out 20
in 22
7
20
MSM486V Manual V3.22
DB9 Pin
1
6
2
7
3
8
4
9
5