The following warnings occurred:
Warning [2] Undefined array key 139019 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 139025 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 139026 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $thread - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $fid - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 139026 - Line: 331 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 331 errorHandler->error_callback
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 304 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $theme - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $theme - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $lang - Line: 5 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 5 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Attempt to read property "messages_in_thread" on null - Line: 5 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 5 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks





HP-20B test



#4

Hold down PMT while turning on the unit. Options include "Tst Screen", "Tst Keyboard", "Checksum", "Tst Battery", "SW Version", "(c) Copyright 2008 HP Dev. C., L.P.", and "TSys Off".

TSys can be toggled on or off. Not sure what it does. Screen and keyboard test are pretty much what you'd expect. Mine shows a checksum of 213.213, battery of 3.500, and the software version is 6 24 2008 (tuesday) or 6.242.

Hit the input key while in battery test, and the display will switch to a live measurement. I ran it down to 2.1V before the readings became inaccurate. (It shut down at about 1.8V or so.)

Looks like the reset all key combo is hold down N and Amort while powering up.


#5

hello,

Quote:
Hold down PMT while turning on the unit. Options include "Tst Screen", "Tst Keyboard", "Checksum", "Tst Battery", "SW Version", "(c) Copyright 2008 HP Dev. C., L.P.", and "TSys Off".

actually, you just need to hold down ON and PMT simultaneously... just like on a 48....

TSys is to enable/disable the test system. when the test system is enable, the CPU NEVER goes into sleep mode and the calculator never shuts down, so I would discourage turning it on.

when the test system is on, you can send key codes to the calculator through the serial com and request screen dumps... this is of course used for the automated test system...

cyrille


#6

Quote:
TSys is to enable/disable the test system. when the test system is enable, the CPU NEVER goes into sleep mode and the calculator never shuts down, so I would discourage turning it on.

Nice to know, thanks! My JTAG setup really likes to have the CPU running when it connects (obviously), so I've been putting the calc in test mode, then starting my debugger. I'll try TSys too--that might be a bit easier, and my cute HP 6218A doesn't mind that the CPU never sleeps.

I was running some code (ARM, not thumb) from SRAM last night, playing around with the display. The LCD mapping is a bit confusing, so I haven't made much progress there.

FWIW, I'm really enjoying hacking on this one. Thanks a lot for leaving the JTAG pads in place!


Possibly Related Threads…
Thread Author Replies Views Last Post
  HP-42S ESD self-test Yriarte 2 1,518 10-24-2013, 09:08 AM
Last Post: Yriarte
  So I took a test with my Prime today ... kris223 12 3,365 09-25-2013, 07:19 PM
Last Post: kris223
  Best way to test HP-71B RAM modules (the 32K/96K ones etc.)? Philippe Lasnier 4 2,352 09-25-2013, 09:54 AM
Last Post: Philippe Lasnier
  HP's thinking behind the 20b/30b? John Ioannidis 3 1,626 09-07-2013, 10:21 AM
Last Post: Tim Wessman
  Concern about Voyager keyboard test Matt Agajanian 2 1,405 08-30-2013, 07:56 PM
Last Post: Matt Agajanian
  Voyager Self Test Mike (Stgt) 5 1,916 05-16-2013, 03:28 PM
Last Post: Mike (Stgt)
  HP 41 Advantage module test RyanM 6 2,053 02-27-2013, 02:30 AM
Last Post: Angel Martin
  20b, 30b not in HP's web store Eric Smith 3 1,443 02-08-2013, 11:52 AM
Last Post: Walter B
  Physics Test Howard Owen 37 8,270 01-24-2013, 03:33 AM
Last Post: Csaba Tizedes (Hungary)
  A non 20b/30b 34S Matt Agajanian 22 5,093 08-20-2012, 01:06 AM
Last Post: Reth

Forum Jump: