Emu48 on Windows blanks out the calculator screen after a while

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Emu48 on Windows blanks out the calculator screen after a while

The HP48 had been my favorite calculator for the past 10 years. I started with the HP 48SX in college and later bought a HP 48GX. Both has worked reliably to this day. Recently, I've been quite excited to find out about Emu48, an emulator for the HP 48 calculator. Emu48 runs on a variety of computer systems, so that I can use the calculator on virtually any computer.

So I promptly installed Emu48 1.45 on my Windows XP laptop. It worked beautifully, I figured out how to transfer programs back and forth. With a full-keyboard, I will be able to develop HP48 programs rather quickly. In fact, I'll be posting HP 48 programs on this site for you to download.

One bug I noticed with Emu48 is that it blanks out the calculator screen after a certain period of time. And once it's blanked you, you can't get the screen back (at least I haven't found a way). The screen wouldn't come back even if you shutdown Emu48 and then start it again. The only way is to start with a new virtual calculator. However, you would loose all calculator memory content.

That is just unacceptable. The HP48 calculator is like a computer. Loosing it's entire memory content means loosing a lot of work. Although I can't figure out why it blanks the screen and how to fix the problem, I found one work-around. And that is to disable "Automatically Save Files On Exit" in the "Settings" dialog box. Once you disabled that option, you can quit Emu48 (BUT DON'T SAVE) and load it up again. The screen would work again and you retain all your data.

Chieh Cheng
Fri, 14 Mar 2008 00:30:45 +0000

I just found another work-around. With this work-around, you can keep the "Automatically Save Files On Exit" option enabled. Once the screen has blanked out, open the "Debugger" dialog box; click "Tools", then "Debugger...". Now, close the debugger. And the screen comes back!

Chieh Cheng
Fri, 14 Mar 2008 00:41:06 +0000

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