8 Bit Dreams wrote: ↑Thu Jan 21, 2021 8:20 pm
Wow! Hopefully You was prepared to see fireworks on power on, since these are four-layer boards. Cutting them may short out GND and VCC inner layers..
Seriously though. There are no traces there, just ground and voltage planes, and they are easy to see at the cut edge. I will put a piece of kapton tape over the edge before I install the RF shield so that there's no chance the shield will touch the layers at the edge.
BTW. Different SDcards take different times to boot even if they have the exact same image on them. What's doing that? With some SD cards I try it takes 20 seconds for it to start doing anything (led activity) while others are instant. Repeatable even when I reinstall freshly to the different cards. Same maxtransfer setting. I have done a huge amount of comparisons. KS3.1 There's more to SD cards than we have control over.
I'm gonna sell my A500 with one of my TF534 now that I have the 500+ and to make the user experience as good as possible I tried all my SD Cards lol and ended up with a 2 GB card that boots in 20 seconds with full WHDLoad and patches.
Lynxman wrote: ↑Sat Jan 23, 2021 3:07 am
I tried all my SD Cards lol and ended up with a 2 GB card that boots in 20 seconds with full WHDLoad and patches.
Could you share the manufacturer, type and size of that one?
I would be interested to know what makes that one so special.
Lynxman wrote: ↑Wed Jan 20, 2021 6:02 pm
Yes. I originally built that red RAM expansion for my A500, and when I got this A500+ I moved it over the the A500+ because it has room for another ram chip to give 1 MB extra chip ram. I then put another old school expansion that only could have 512 kB in my old A500. I omitted the motherboard battery because of the clock on the ram board and it seems to work fine. It's more practical to have battery access from the expansion bay anyway.
I was more wondering how it works, do they not conflict?
Have you disabled the onboard RTC?
Lynxman wrote: ↑Sat Jan 23, 2021 3:07 am
I tried all my SD Cards lol and ended up with a 2 GB card that boots in 20 seconds with full WHDLoad and patches.
Could you share the manufacturer, type and size of that one?
I would be interested to know what makes that one so special.
It's an old Sandisk with a strange sticker on it saying "Easy Going". I don't remember what it came in. Probably an old GPS. It has SanDisk stamped in the back which is how I know it's Sandisk. I have another Sandisk Extreme III 2GB which has higher transfer speeds but still bootsmuch slower. It takes 20 seconds before any activity happens with it. There's something in these things causing them to act differently.
I have ordered a different IDE to SD adapter which was more expensive which might change things too.
Lynxman wrote: ↑Wed Jan 20, 2021 6:02 pm
Yes. I originally built that red RAM expansion for my A500, and when I got this A500+ I moved it over the the A500+ because it has room for another ram chip to give 1 MB extra chip ram. I then put another old school expansion that only could have 512 kB in my old A500. I omitted the motherboard battery because of the clock on the ram board and it seems to work fine. It's more practical to have battery access from the expansion bay anyway.
I was more wondering how it works, do they not conflict?
Have you disabled the onboard RTC?
Not sure. I haven't paid much attention to the clock. Guess it would be a good idea to disable the one on the expansion.
