Mar 29, 2025, 5:45 AM

And yup, it boots, at least in QEMU. Emulated 486DX CPU, 16MB of RAM and a standard 1.44M floppy disk image, booted with this lovely tiny-floppy-bootloader project: https://github.com/guineawheek/tiny-floppy-bootloader

Unfortunately, it errors out in 86box upon calling interrupt 0x15 after enabling the A20 line (?), which, as far as I could find out, has something to do with the lack of a memory size reporting instruction in protected mode in BIOSes, which just wasn't a standardized thing before the 2000s or something? Hmpf

Screenshot of a terminal window showing the output of "ip addr show", which reports information about the loopback interface, two ethernet interfaces with IP addresses assigned and a Wireguard interface. Followed by that command is the output of "wg show", which shows an active Wireguard connection, followed by the first few lines of "cat /proc/cpuinfo", showing this Linux system runs on an emulated Intel 486DX/4

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