INT 21 is DOS, not BIOS. You can still use INT 10 for BIOS video services. Or ju... | Hacker News

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		userbinator on March 26, 2020 \| parent \| context \| favorite \| on: Getting started with bare-metal assembly INT 21 is DOS, not BIOS. You can still use INT 10 for BIOS video services. Or just write into the text framebuffer directly; it's at B800:0000 in colour modes and B000:0000 in monochrome modes (it's surprising how much I still remember from when I exclusively did x86 PC Asm, ~3 decades ago.)

fmakunbound on March 27, 2020 [–]

Err I don't know... Didn't the bios set the video controller up for you? Not bare metal enough, I'm afraid. /s

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