Serial Ports - HP48, PC, HP200LX, etc



#2

Being frustrated with various device pinouts, I've 'published' a diagram (it's an Excel Book) of various Serial port pinouts here:

http://tchrapkiewicz.googlepages.com/hp48

[Serial Ports Link]

I can add the HP49 pinout once I find one.

Also, the pic at the top of the page is an overlay (still working on getting the layers lined up) of both sides of an HP48 PCB.

TomCee


#3

A quick look at 2 versions of the HP48 connector has me wondering.
On the RS232 sheet, the pinouts are in the sequence STRG.
On the HP48 sheet, the pinouts are in the sequence GTRS.


#4

Ken:

I'm glad that you brought this up - as this is EXACTLY the reason why I put this information on this sheet in the format that it is.

The descriptions I put on the connectors refer to the data direction at the device itself. The diagram you are referring to on the HP48 page has the nomenclature referring to the PC that the HP48 is connected to! Notice the direction of the arrows on the diagram, and you can clearly see that the 'T' line of the calculator is going to the RX line of the PC. etc...

Regards,
TomCee


#5

Thanks for the explanation.


#6

I've updated the sheet to include the HP49 connector.
TomCee


Possibly Related Threads...
Thread Author Replies Views Last Post
  IR Link Problem: HP48 <-> PC Waon Shinyoe (China) 1 134 03-16-2013, 03:37 AM
Last Post: Eric Smith
  HP200LX Connectivity SW Luiz C. Vieira (Brazil) 6 306 11-07-2012, 04:07 PM
Last Post: Luiz C. Vieira (Brazil)
  How to Install/Setup PC to HP41CL Serial Transfer Software? Michael Lopez 15 453 08-14-2012, 08:45 AM
Last Post: Michael Lopez
  running hp200lx solver on kindle fire william egan 4 221 03-10-2012, 07:25 PM
Last Post: Bill (Smithville, NJ)
  HP200LX's Calc under Win7 Mike (Stgt) 22 676 09-26-2011, 11:49 AM
Last Post: Didier Lachieze
  HP41CL physical ports -or- how many physical ports do you require with the HP41CL? Geoff Quickfall 18 558 06-23-2011, 01:49 AM
Last Post: Geoff Quickfall
  OT: HP200LX Mass Storage Gerry Schultz 4 178 10-06-2010, 07:48 PM
Last Post: Gerry Schultz
  Why are Serial Ports so Annoying? 49G But sort of Off Topic bill platt 5 204 03-02-2010, 11:50 AM
Last Post: Ron Ross
  HP200LX Connectivity Pack under Windows 7 Mike (Stgt) 6 237 03-02-2010, 08:20 AM
Last Post: Mike (Stgt)
  HP 48 serial cable but no serial port in laptop juan demin 10 357 09-09-2009, 02:20 PM
Last Post: Patrick Rendulic

Forum Jump: