Parallel JTAG Adapter to USB

[enliteneer]

All of the Parallel to USB Bridge devices/cables I've found are either intended to be used with a printer, or don't work on winXP/Win7
( usbgear.net/item_157.html, lpt2usb.net   )

The problem is, I have a parallel port jtag debugger on WinXp and I don't have a parallel port!    There's tons of USB to I/O solutions (Cypress, FTDI, etc), so I'm not sure why this isn't possible.

It would seem that if your usb adapter can read/write I/Os, not full speed since bit-banged, then it can generate EPP/ECP/SPP/BPP.   Perhaps would the tricky part be the usb driver?  It would have to intercept I/O read/write calls to 0x378 and route them instead to the DB25...    But even this doesn't seem totally impossible...   what am I missing?

[Jan Axelson]

This is the only solution I know of. I haven't tried it:

http://www-user.tu-chemnitz.de/~heha/bastelecke/Rund%20um%20den%20PC/USB2LPT/index.html.en

Jan

[Guido Koerber]

This is going to be couple orders of magnitude slower than a real parallel port. And as you already said you would need to intercept I/O address accesses and channel them through USB.

I think the only realistic options are to either get a real parallel port into your machine, or replace the device.