SD cards are a technology taken right out of early Gibson, real neuromancer shit. Incredible trash tech. Gigabytes of low quality abundance. Small enough to lose even when you're paying attention. Extraordinary but embarrassingly low grade.

There's very nice classy ones from SanDisk but there's so many more from nameless foundries for sale on AliExpress and a tenth the price, that mostly work.

(Chairman George Morrow would shit bluebirds: "never underestimate the bandwidth of a station wagon full of floppy disks", two obsolete things in one sentence.)

I'm using the big ones in my cp/m machine. Doing serious endurance testing and marginal testing. The really cheap ones do _weird_ things sometimes but work ok, mostly. I now have some good test code, ask me in a week....

With two cards installed, on the same SPI buss, doing random disk random block random read/write I *suspect* there is some odd stuff going on, but it's hard to separate code from electronics from the cards' various effects.

Pretty fucking interesting though.

I want to make the cheap cards as usable as the good ones. I think tristate buffers will do that.

Rooting for the underdogs.

Ghost bat (Macroderma gigas)

📸 S. J. Bennett (CC BY)

💬 Suggest alt text: https://github.com/querkmachine/bat-bot/issues/new?labels=image+description&template=image-description.yml&title=Image+description%3A+Macroderma%20gigas%202.jpg&filename=Macroderma%20gigas%202.jpg

Florida bonneted bat (Eumops floridanus)

📸 Enwebb (CC BY-SA)

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🦉 The birds of America: .
New York: J.B. Chevalier, 1840-1844..

[Source: https://biodiversitylibrary.org/page/40383168]