Ways to print hello world in assembler on a Raspberry Pi

github.com

47 points·fragmede··9 comments

> Hello World using putchar(). This is closer to how the computer actually does it deep down inside.

Generally putchar is just going to call write anyways, which takes a buffer.

Unrelated: seeing 32-bit ARM code for a device that has been 64-bit for years just makes me sad :(

Raspberry Pi Zero-W is 32-bit.

Even more unrelated: Uvicorn servers don't run on 32-bit machines as of version 0.19.0

Also for this example, it is not unusual, especially for RISC ISAs, to have to or for it to be optimal to count down rather than how we’re taught in CS/EE/CE to count up in loops. RISC machines can often do several interesting things with zero’d registers or flags or conditions.

Related ongoing thread:

Assembler on Raspberry Pi - https://news.ycombinator.com/item?id=36899712 - July 2023 (9 comments)

Oh wow. Is the rpi4 already 4 years old? Maybe they should start making them.

I think the shortage is finally over. Not sure, but I was able to pick an 8G model up a couple weeks ago no problemo. I saw a post the other day from a vendor that said they finally got through a day with some still in stock, too.

For a price ... at least in NZ. Way over the 2019 price.

Hmm, I didn't notice any price increase. But then again, I have a habit of not paying attention to the price, and I buy them from England so I get them before the local shops do. So it very well could have come up in price.

How people haven't amassed a pile of these already blows my mind. I ended up buying more than I needed years ago, because they were so cheap and readily available

It probably doesn't make much sense if we have to deal with customs, but I'm happy to send these off to others in the US

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