HP 39gs and SD card

[rcpdvc]

(01-05-2018 02:34 AM)matthiaspaul Wrote:  I haven't tried myself, does newRPL ignore the write protection switch? Doesn't sound like the best of ideas to me then...

newrpl ignores write protection switch (at least 39gs version). And I think that's right. It's tiny mechanics and both lock failure and unlock failure are possible. Using file system facilities is way more reliable.

(01-05-2018 02:34 AM)matthiaspaul Wrote:  Yes, it is good practise to add some 10pF to the clock of SD cards. This reduces the emission of higher frequencies (harmonics) to avoid EMI problems. Otherwise you might "hear" your calculator in nearby radios.

I've got it. I need a radio to listen my 39gs before I place these 10pF.