Pilbox speedup on Mac OS X



#2

Just to let you know that it is possible to reduce the latency timer on the Mac OS X side (with VCP driver) to make communications between the Mac and Pilbox faster.

To make it work, edit /System/Library/Extensions/FTDIUSBSerialDriver.kext/Contents/Info.plist and insert latency timer settings.

sudo touch /System/Library/Extensions

then reboot.

I got about 2.5 speedup doing this, much better, though I had hoped for a bit more as the latency timer was reduced by a factor of 8.


#3

It's been a while (2009), but I had to request a custom FTDI driver for OS/X to even have the LatencyTimer setting exposed. I guess it's standard now?

Anyway, a setting of "2" gave me the same performance as the PILBox on Windows. IIRC, it was the same speed as using real HP-IL gear.


Possibly Related Threads...
Thread Author Replies Views Last Post
  Writing RPL programs on OS X Sean Freeman 18 1,196 11-30-2013, 03:59 PM
Last Post: Sean Freeman
  HP-Prime firmware update on a Mac Javier Goizueta 5 559 11-15-2013, 10:52 AM
Last Post: Javier Goizueta
  PILBox on Mac OS X success Håkan Thörngren 5 371 03-25-2013, 11:45 AM
Last Post: Egan Ford
  Saturn on Android_OS and i-OS CompSystems 6 455 03-17-2013, 01:40 PM
Last Post: hugh steers
  Flashing a WP34s with a Mac Philippe Cairic 10 617 01-08-2013, 12:49 PM
Last Post: Walter B
  X-41 on Mac Book Jean-Michel 6 498 11-22-2012, 03:47 PM
Last Post: Jean-Michel
  New features on HP39gII next coming OS Mic 0 202 10-29-2012, 02:10 AM
Last Post: Mic
  The latest version of Free42 is now a OS X Universal application..... zeno333 1 246 10-21-2012, 11:12 PM
Last Post: Matt Agajanian
  I need the last OS X "Universal" version of Free42..... zeno333 0 191 10-13-2012, 04:45 PM
Last Post: zeno333
  Make PIL-Box ILPer program run on OS X Juergen Keller 6 521 09-07-2012, 04:38 PM
Last Post: Hans Holzach

Forum Jump: