HP Forum Archive 14

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LCD contrast on halfnuts Message #1 Posted by Miki Mihajlovic on 4 Mar 2004, 4:53 p.m. I recently got my first 41 CX after 20 years of using CV (still good and in use) but it arrived without manuals. After a MASTER CLEAR, LCD resets to contrast 3 or 4 on a scale 0-15 what is a bit pale for my eyes. Is there a way to change the contrast on a halfnut LCD from the keyboard using some key combination, such as SHIFT ON for displaying time, instead of CTRST function from Sandbox ROM - the only one I know of that deals with LCD contrast setting.

Re: LCD contrast on halfnuts Message #2 Posted by Diego Diaz on 4 Mar 2004, 9:19 p.m., in response to message #1 by Miki Mihajlovic Hi Miki, I only know of HEPAX and SandBox for HalfNut contrast control, others may exist though. And yes, the default setting is certainly poor... it is set to 5 in a 0-15 range. Fortunatelly you only need to set it once and it's "remembered" even if a MEMORY LOST is achieved. To my eyes (literally) the best setting is 7 or 8... but this is a personal choice anyhow... ;-) Cheers. Diego.

Re: LCD contrast on halfnuts Message #3 Posted by Michel Beaulieu on 6 Mar 2004, 9:20 p.m., in response to message #2 by Diego Diaz I don't know how to do that contract setting on my halfnut; can someone tell me hw to dot it? Thanks Michel

Re: LCD contrast on halfnuts Message #4 Posted by Miki Mihajlovic on 6 Mar 2004, 11:09 p.m., in response to message #3 by Michel Beaulieu Angel Martin's Sandbox ROM has a few functions that can read, set, increment contrast settings of a halfnut's LCD on the scale 0-15. You can get Sandbox only if you have Clonix and put it into two of its six available pages. Digeo says that Hepax has similar function. If you have Hepax then you are among few lucky ones. It does seem that once you set the contrast it is remembered even after a master clear. 1234

Re: LCD contrast on halfnuts Message #5 Posted by Garth Wilson on 7 Mar 2004, 1:14 a.m., in response to message #4 by Miki Mihajlovic If it's adjustable, it seems like there should be a way to do it with the Zenrom too. I never gave it a thought though, because my 41cx halfnut's display, from a normal usage angle, is really, really black against the silver-gray-- very easy to read in any light.

Re: LCD contrast on halfnuts Message #6 Posted by Johnny on 17 Mar 2004, 9:22 a.m., in response to message #5 by Garth Wilson Yes and no. You can adjust the constrast with the Zenrom, if you also have an MDLD or similar device to store machine code in. The Zenrom will allow you to write m-code, but will not access peripherial devices itself.

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