Incidentally the Allwinner F1C100s used in this business card (https://www.thirtythreeforty.net/posts/2019/12/my-business-card-runs-linux/ https://www.thirtythr

Incidentally the Allwinner F1C100s used in this business card (https://www.thirtythreeforty.net/posts/2019/12/my-business-card-runs-linux/ https://www.thirtythreeforty.net/posts/2019/12/my-business-c..., https://news.ycombinator.com/item?id=21871026 https://news.ycombinator.com/item?id=21871026) contains an ARM9 series core clocked at 900MHz alongside 32MB of on-die DDR1, is designed for dashcam-type applications (SDIO, LCD, USB2 OTG, no PHY) and the author of the linked article was able to buy them for $1.42 each. I've long been curious about MIPS from a hobbyist/tinkerer/maker perspective and would be very interested to know what silicon I might select at a similar price point.