It is OK-ish if you just want to move one thing into one unit, past that it quickly becomes useless and doing PIO becomes faster ...

- am author but HN is limiting how fast i can reply :(

BOM is $5 or so, PCB is $1

- am author but HN is limiting how fast i can reply :(

Very nice! At that amount your biggest expense would be in time.

Have you ever considered offering this as a service to others? I'm guessing you could make some pretty big savings in parts too if you were ordering in bulk.

I think this would defeat the purpose of showing off your skills.

I think this would defeat the purpose of doing things just because you want to!

I am going to have a small batch made now, as I mentioned in the article. Then we'll see

software engineer @ google

Figures. MTV? (xoogler here)

Please note what I said. I release interrupts after every byte READ/WRITTEN, so that the maximal delay to a refresh is the length of a single byte read/write. In case it wasn't clear, the only interrupt in use is the ram refresh interrupt. If it is masked, and triggers, it will execute the handler when it is unmasked. This means that even a loop on RAM read/write will not starve RAM of refreshes

[also, why do I keep being told I am submitting too fast, please slow down. I just posted 2 comments here, that is all. Had to make a new username :(]

> [also, why do I keep being told I am submitting too fast, please slow down. I just posted 2 comments here, that is all. Had to make a new username :(]

I think there is extra throttling on brand-new accounts, to help keep spam under control. Once your account is a little older it will be less restricted.

Also: welcome, and thanks for joining the discussion!