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DIGITAL-LOGIC AG
4.4
Interface
4.4.1
Keyboard AT compatible and PS/2 Mouse
Pin
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
4.4.2
Line Printer Port LPT1
A standard bi-directional LPT port is integrated into the MICROSPACE PC.
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 = 12 mA
4.4.3
Serial Ports COM1-COM2
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:
Serial Port Connectors COM1, COM2
Pin
Signal Name
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.
Signal
Speaker out
GND
Ext. reset input
VCC
Keyb. Data
Keyb. Clock
GND
Ext. Battery
Mouse Clock (PS/2)
Mouse Data (PS/2)
IOL = 24mA
National PC87317VUL:
Function
Data Carrier Detect
Data Set Ready
Receive Data
Request To Send
Transmit Data
Clear to Send
Data TerminalReady
Ring Indicator
Signal Ground
24
MSM800 SEV Manual V1.0A
2 x 16C550 compatible serial interfaces
in/out
DB25 Pin
DB9 Pin
in
8
in
6
in
3
out
4
out
2
in
5
out
20
in
22
7
1
6
2
7
3
8
4
9
5
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