I/O Card - Unkown Model and Make

 

 

Connector Outlook
 
Board Location Port Connector cable Adapter
CN1 Serial Port A 9-Pin D Shell No
CN2 Serial Port B 10-Pin Header Type 10-Pin to 25 Pin
CN3 Parallel Port 25 Pin D Shell No
 

I/O BASE ADDRESS AND IRQ LEVEL

The 1/0 Card serial ports can be hardware assigned to four possible I/0 base addresses,they are:
 
  COM1 3F8-3FF Hex 
  COM2 2F8-2FF Hex
OR     
  COM3  3E8-3EF Hex
  COM4  2E8-2EF Hex 
 

The serial ports also can be assigned to various combination among four IRQ levels ( IRQ 2, 3, 4, 5) by hardware selection.
 
Address JP1 JP5 JP6 JP9 JP10 JP11 JP12
COM 1 (IRQ 2) short short open short open open open
COM 1 (IRQ 3) short short open open short open open
COM 1 (IRQ 4) * short short open open open short open
COM 1 (IRQ 5) short short open open open open short
If you want to disable COM 1, you should open JP 1

* - Default setting
 
Address JP2 JP5 JP6 JP13 JP14 JP15 JP16
COM 2 (IRQ 2) short short open short open open open
COM 2 (IRQ 3) * short short open open short open open
COM 2 (IRQ 4) short short open open open short open
COM 2 (IRQ 5) short short open open open open short
If you want to disable COM 1, you should open JP 2

* - Default setting

 
 
Address JP1 JP5 JP6 JP9 JP10 JP11 JP12
COM 3 (IRQ 2) short open short short open open open
COM 3 (IRQ 3) short open short open short open open
COM 3 (IRQ 4) short open short open open short open
COM 3 (IRQ 5) short open short open open open short
If you want to disable COM 3, you should open JP 1

 
 
Address JP2 JP5 JP6 JP13 JP14 JP15 JP16
COM 4 (IRQ 2) short open short short open open open
COM 4 (IRQ 3) short open short open short open open
COM 4 (IRQ 4) short open short open open short open
COM 4 (IRQ 5) short open short open open open short
If you want to disable COM 4, you should open JP 2

 

Serial Port Interface signals and cables

The following table applies to the RS232 cable connected to serial port A (CN 1) as well as Serial Port B (CN 2)
 
CN 1 Signal 25 pin Cable end
1 DCD (Data Carrier Detect) 8
2 RD (Receive Data) 3
3 TD (Transmit Data) 2
4 DTR ( Data Terminal Ready) 20
5 GND (Ground) 7
6 DSR (Data Set Ready) 6
7 RTS (Request to Send) 4
8 CTS ( Clear to Send) 5
9 RI (Ring Indicator) 22
10 Not Used -
 

 

PARALLEL PRINTER PORT

The I/0 card supports a parallel printer port which conforms with the Centronics standard through a 25-pin D type connector (CN3). The parallel port can be hardware assigned to two possible I/0 base address, they are:
 
  LPT2  378-37F Hex 
OR     
  LPT3  278-27F Hex
The parallel port also can be assigned to various combination among three IRQ levels ( IRQ 2, 5, 7) by hardware selection.
 
Address JP3 JP4 JP7 JP8 JP17 JP18 JP19
LPT 2 (IRQ 2) short open short open short open open
LPT 2 (IRQ 5) * short open short open open short open
LPT 2 (IRQ 7) short open short open open short short
If you want to disable LPT 2, you should open JP 3

* - Default setting
 
Address JP3 JP4 JP7 JP8 JP17 JP18 JP19
LPT 3 (IRQ 2) open short open short short open open
LPT 3 (IRQ 5) open short open short open short open
LPT 3 (IRQ 7) open short open short open short short
If you want to disable LPT 3, you should open JP 4
 
 

Home Not Another Web Page Index

Page updated 98/07/14