USB to parallel (was M68KIT912DP256) | 68HC12

Have you looked into the Keyspan USB to parallel port adapter? It is compatible with a large number of parallel port printers, such as Epson and HP. I've never used one, but I've been searching for USB to legacy port adapters and saw this. Link is: http://www.keyspan.com/products/usb/up6c/ Price is $39 in singles. Karl > -----Original Message----- > From: [mailto:] > Sent: Friday, January 10, 2003 4:41 AM > To: > Subject: RE: [68HC12] M68KIT912DP256 > It is ridiculous that the P&E Multilink cable still requires > a standard > parallel port. Throw in XP and we have not been able to get > our cable to > work yet It will work under Win 98 but fails under XP even > with the port > configured to use interrupts. The other issue I have with a standard > parallel port is the only one you can have is the one built > on your mother > board. Under XP if you install a PCI parallel port you will > be unable to > set it to the standard I/O address for the standard parallel > port. This > is fine if you can dedicate your computer to every > development project. > What if you need more than one BDM cable that requires a > standard parallel > port. Then you have to use an A/B switch but if your pod is > powered you > can damage the emulator pod or the computer if you forget to > power off > between changes of port. > > Rod Niner

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>Have you looked into the Keyspan USB to parallel port adapter? It is >compatible with a large number of parallel port printers, such as Epson and >HP. I've never used one, but I've been searching for USB to legacy port >adapters and saw this. Link is: >http://www.keyspan.com/products/usb/up6c/ >Price is $39 in singles. I haven't tried it, but I would just about put money on it NOT working. The parallel pods work by wiggling the various I/O bits of the parallel port. On 95/98, they use IN and OUT instructions. On NT,2000,XP, they call a driver that enters kernel mode and does IN and OUT instructions (which are illegal at user level). In either case, they have nothing to do with any Windows printer drivers. I presume that USB parallel ports include a driver that makes the device look like a printer port, but probably not at the IN/OUT level. I wouldn't mind being proven wrong, though. USB to SERIAL is a different animal: here, most programs don't diddle the UART, the just use Win32 OpenFile on COMx and then Read and Write. Thus, the USB device just needs to enumerate as a COM port, and user programs should be able to use it with no modification. (The real test would be the Kevin Ross pod: it toggles RTS/CTS on every byte. Thus, the convertor would need to pass control signals with proper timing, as well as data.) Best regards, John Hartman NoICE Debugging Tools http://www.noicedebugger.com [Non-text portions of this message have been removed]

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Discussion Groups | 68HC12 | USB to parallel (was M68KIT912DP256)

USB to parallel (was M68KIT912DP256) - Karl Lunt - Jan 10 10:14:00 2003

Re: USB to parallel (was M68KIT912DP256) - John Hartman NoICE - Jan 10 17:44:00 2003