ARM opcodes

I have problems to understand this:
MOV r0,#&80000000 translates to 0101 e3a0.
How do I make 0101 to &80000000?

First that translates as &E3A00102

The instruction is really

MOV R0,#&xx,ROR #2r

where r is 4 bits wide, i.e. max rotate thirty bits.
In your case r = 1 and &xx = &02.
The LSB is &xx, and the nibble before that is r.

Compare with MOV R0,#&40000000 which is really MOV R0,#&01,ROR #2, so the opcode is

&E3A00101

See ARM instruction format by Robin Watts; playing around in Zap code mode (Ctrl-Shift-F5) can be helpful.

…in that regard you can also play with that on this site at the bottom of the page

Thanks! Got a better view now!

Anyone read the eBook ‘Programming with 64-Bit ARM Assembly Language’ by Stephen Smith?

@Colin,
I didn’t read it. When I had a look at it on amazon it appeared to me like some introductory book, like for who needs to start or has very basic knowledge, so did not buy it.

I see this book in available in paper or Kindle.

Is there a way of displaying a downloaded Kindle eBook onto RISC OS?

Legally, no.

Less than legally, it’s a clumsy business with installing (an older?) Kindle app on an Android device, ripping the device specific encryption keys out using adb, then letting a Calibre plugin chew on them for a while in order to allow it to translate Kindle files (downloaded to that device only) into epub for use on pretty much anything that isn’t a Kindle.

I used to do it for mom. She’d buy ebooks off Amazon, and I’d then rip them into epub for her non-Kindle reader (a Pocketbook 640, IIRC).
I considered just getting her a Kindle, but it doesn’t appear to support epub, which means it’s a bit of a walled garden.

I don’t do this stuff myself. Too much of a palaver (and I’m not sure if that method still works, it did with mobi files but I don’t know about azw or whatever it is these days). Plus, I’m rather partial to dead tree, and with Amazon Prime I can get my dead tree at prices sort of in line with the usual prices for books, not the 150% markup “because it’s foreign” that the supermarkets tried to pull.

Looks like you still can (using the PC app is simpler) but it still looks like a bother to get set up and running.

Then, on RISC OS, if you want a quick and dirty view then my Ebook app might cope. Maybe. ;-) Don’t expect formatting though.

Otherwise, MuView.