Continue to Site

Welcome to

Welcome to our site! is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Problem with running Microsim Pspice which uses a security plug on a port

Not open for further replies.


Newbie level 4
Jul 25, 2007
Reaction score
Trophy points
Activity points

I have a new computer which does not have a parallel port.
I need to run Microsim Pspice which uses a security plug on that port.
I bought a parallel port card and plugged it in but it didn't work cause
the card only emulates the port and Pspice plug needs a fixed address.

Does anyone know how I can get around this problem?
Is there a card out there that does have a fixed address?

Thanks for any help.

Re: Pspice Security Plug

I think its your OS. Not the card.
Do you have a new desktop or a new laptop ?? I am assuming you have a laptop since most new desktops have parallel ports still. Laptops are phasing them out.
If you DO have a desk top, then a $20 PCI SW-1473 should work. Or a SW-1485 if you have a laptop.
Remember, that if you are using the old Microsim 8 PSpice like me, copywritten in 1993, the software wants to see an unrestricted (or unprotected) parallel port at 0x378. Windows 95 and 98 will work just fine but XP,NT,2000 and newer do not allow direct reads and writes to the parallel port. Just Google ALLOWIO or PORTTALK. I forget what I did exactly but it solved my problems with windows XP.
I also had to convert my license floppy to CD to get the install to work. I hope I helped. Good luck.

Not open for further replies.

Part and Inventory Search

Welcome to