Interfaces; Ps/2 Keyboard (At Compatible) And Ps/2 Mouse; Line Printer Port Lpt1; Serial Ports Com1 - Com2 - DIGITAL-LOGIC MICROSPACE MSEBX800 User Manual

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5.2. Interfaces

5.2.1.

PS/2 Keyboard (AT Compatible) and PS/2 Mouse

X31 Keyboard
Pin Signal
1 KB_Data
3 GND
6 KB_Clk
X32 Mouse
Pin Signal
1 MB_Data
3 GND
6 MB_Clk
5.2.2.

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 other reference documents.
The current is: IOH = 12mA
The SMC 37C672 may be programmed via software commands.
In the new BIOS version, this selection may be controlled with the BIOS setup screen.
5.2.3.

Serial Ports COM1 - COM2

The serial channels are fully compatible with 16C550 UARTS.
X30B / X39 Serial Port Connectors COM1, COM2
Pin Signal Name Function
1 CD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Pin Signal
2 -
5 +5Volt / 100mA
8 -
Pin Signal
2 -
5 +5Volt / 100mA
8 -
IOL = 24mA
Data Carrier Detect
Data Receive Data
Transmit Data
Data Terminal Ready
System Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
MSEBX800/900 Detailed Manual V1.0
in/out DB25 Pin
in 8
in 6
out 3
out 4
- 2
In 5
out 20
in 22
in 7
33
DB9 Pin
1
6
2
7
3
8
4
9
5