HP Forums
HP-30b unknown options - Printable Version

+- HP Forums (https://archived.hpcalc.org/museumforum)
+-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html)
+--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html)
+--- Thread: HP-30b unknown options (/thread-210515.html)

HP-30b unknown options - Christopher Johnson - 01-30-2012

I'm exploring my 30b and I hold the PMT button and turn the unit on. I see Tst Screen, Tst Keyboard etc. onto TSys Off and Slow Clk.

Does anyone know what Tsys and Slow Clk are, or what they do?

Thank you for any information on this.


Re: HP-30b unknown options - Eric Smith - 01-31-2012

Tsys will, if enabled, prevent the calculator from going into sleep mode, which means that it will drain the batteries much faster than usual.

Re: HP-30b unknown options - Marcus von Cube, Germany - 01-31-2012

Slow Clk is a way to tell the firmware the actual processor speed which depends on temperature, humidity, and whether it's a holiday or not ;-). The test system has a serial connection, and to make this work a more accurate knowledge of the speed of the system is needed.

Re: HP-30b unknown options - Christopher Johnson - 02-01-2012

Thank you Eric and Marcus for the information.