search

phil-opp / blog_os

Writing an OS in Rust
http://os.phil-opp.com
Apache License 2.0
14.27k stars 1.01k forks source link

Boooting post-03 (vga text mode) on real hardware does not work #1263

Closed lachsdachs closed 2 months ago

lachsdachs commented 5 months ago

I am trying to create a bootable usb stick. cargo run is working, and i have all the necessary tools installed, but when i try to boot from the stick it fails, even though writing the image seemed to work fine.

I have tried on two different machines. On one of them i can select the stick as a boot medium, but when i try to run it the screen just flashes black and goes back to normal. The other machine has no OS installed on the primary disk and when i insert the usb stick there and try to reboot it it just prints errors like DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER or not a bootable drive, insert bootable floppy

bjorn3 commented 5 months ago

Do you have CMS enabled in the firmware setup for BIOS compatibility?

lachsdachs commented 5 months ago

I enabled that now (had to also disable Kernel DMA protection), but still nothing. And my much older PC probably has it enabled by default. To me it seems like there is an issue with the bootimage tool, but apparently it is working for other people.