PORTS Forum

Ports and Interfaces => USB => Topic started by: 007-half on February 16, 2012, 07:36:15 am

Title: HP 95LX to PC connection
Post by: 007-half on February 16, 2012, 07:36:15 am

Hi,
I'm looking for a TTL serial (4-pin DB9) to USB adapter but not sure which, if any, will work with the HP 95LX's 16450 UART, i.e. no buffer.

What is the best solution?  (apart from put it in a museum!)  :)

Thank you in anticipation,
007-half

Title: Re: HP 95LX to PC connection
Post by: Jan Axelson on February 16, 2012, 09:06:39 am

Try a DB9-USB Module:

http://www.ftdichip.com/Products/Modules/USBRSxxx.htm

Check mouser  or digikey for stock.

Jan

Title: Re: HP 95LX to PC connection
Post by: 007-half on February 16, 2012, 12:09:33 pm

Thank you Jan,
I've ordered a cable version, so fingers crossed .. :)
Cheers!
John

Title: Re: HP 95LX to PC connection
Post by: dhouston on February 16, 2012, 02:04:23 pm

Would this work?

http://www.dealextreme.com/p/usb-to-rs232-serial-port-adapter-transparent-green-24512 (http://www.dealextreme.com/p/usb-to-rs232-serial-port-adapter-transparent-green-24512)

Title: Re: HP 95LX to PC connection
Post by: Jan Axelson on February 16, 2012, 05:27:38 pm

It's RS-232 and you said you were looking for TTL.

Jan

Title: Re: HP 95LX to PC connection
Post by: 007-half on February 16, 2012, 06:39:15 pm

Hi Jan,
Please forgive the inexactitude of my request. Having seen what our Scottish friends at  FTDI have to provide, their offer seems too good to miss. Also, I'm just across the border if required to give Glasgow a bloody nose!

Just joking :)
John

Title: Re: HP 95LX to PC connection
Post by: dhouston on February 17, 2012, 10:48:13 am

Combining this...
http://www.dealextreme.com/p/usb-to-rs232-serial-port-adapter-transparent-green-24512 (http://www.dealextreme.com/p/usb-to-rs232-serial-port-adapter-transparent-green-24512)
and this...
http://www.dealextreme.com/p/rs232-serial-port-express-card-adapter-blue-black-silver-101467 (http://www.dealextreme.com/p/rs232-serial-port-express-card-adapter-blue-black-silver-101467)
costs less ($6.60/£4.17) than the FTDI device ($28/£17.75).

Title: Re: HP 95LX to PC connection
Post by: 007-half on February 24, 2012, 08:39:44 am

Hi, just a quick note to say thank you for everyone's help.

Finally connected using the FTDI USB-to-Serial Port, running Kermit 95 on Windows 7. A 20 year upgrade for the HP 95LX!

"Swear-box empty, glass half full"
John

Title: Re: HP 95LX to PC connection
Post by: Jan Axelson on February 24, 2012, 10:10:41 am

Excellent!

Jan