{"id":30575913,"url":"https://github.com/nubbsterr/vbb","last_synced_at":"2026-05-18T04:47:07.047Z","repository":{"id":311037433,"uuid":"1041540845","full_name":"nubbsterr/vbb","owner":"nubbsterr","description":"A very basic x86 bootloader project","archived":false,"fork":false,"pushed_at":"2025-08-21T17:34:30.000Z","size":24,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2025-08-21T20:06:22.559Z","etag":null,"topics":["assembly","bootloader","i386","linux","nasm","qemu"],"latest_commit_sha":null,"homepage":"","language":"Assembly","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/nubbsterr.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2025-08-20T16:31:17.000Z","updated_at":"2025-08-21T17:34:33.000Z","dependencies_parsed_at":"2025-08-21T20:06:39.494Z","dependency_job_id":"e751f6ef-3c57-44ed-a105-52a1dc583216","html_url":"https://github.com/nubbsterr/vbb","commit_stats":null,"previous_names":["nubbsterr/vbb"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/nubbsterr/vbb","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nubbsterr%2Fvbb","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nubbsterr%2Fvbb/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nubbsterr%2Fvbb/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nubbsterr%2Fvbb/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/nubbsterr","download_url":"https://codeload.github.com/nubbsterr/vbb/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nubbsterr%2Fvbb/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":272590140,"owners_count":24960866,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-08-28T02:00:10.768Z","response_time":74,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["assembly","bootloader","i386","linux","nasm","qemu"],"created_at":"2025-08-29T00:38:58.838Z","updated_at":"2026-05-18T04:47:02.003Z","avatar_url":"https://github.com/nubbsterr.png","language":"Assembly","funding_links":[],"categories":[],"sub_categories":[],"readme":"# VBB, the Very Basic Bootloader (and Kernel) (and OS)\nSome experimentation with making an x86 bootloader, built upon [Nir Lichtman's own tutorial](https://www.youtube.com/watch?v=xFrMXzKCXIc), with further assistance from [Daedalus Community's OSdev series](https://www.youtube.com/watch?v=MwPjvJ9ulSc).\n\nNote: I don't plan on using a cross-compiler for this just cuz build time/downloading bunch of dependencies and my rootfs is 55% full lol. There is an Arch build script though for cross-compiling gcc though, which you can find [here](https://github.com/mell-o-tron/MellOs/blob/main/A_Setup/setup-gcc-arch.sh)!\n\nThis is made to be a toy project to see what OSdev is really about. \n\n# dependencies\nDependencies needed are `nasm`, `qemu-system-i386`, and `tigervnc`. \n\nYou can avoid using `tigervnc` by simply having GUI support with your Qemu install. On Arch, I personally have installed the `qemu-system-i386` package and `tigervnc`; installation may differ for your distro.\n\n# assembly and testing\n**Without a cross-compiler I can't really compile this for my system however we can compile the bootloader and have fun with it.**\n\nSimply run `nasm bootloader.s` then `qemu-system-i386 bootloader`. We can then access the VNC server using TigerVNC like so: `vncviewer localhost:0`.\n\nNote that the port may differ if you supply the `-vnc` flag and modify the hosting port.\n\n# current functions\n- Prints text to the screen in real/protected mode and would load our kernel and execute however that is not the case at the moment since I didn't cross-compile anything.\n    - What's crazier is that even without the kernel loaded anywhere it still continues to protected mode so I believe there's some undefined behaviour here but whaaaaatever.\n- When trying to find kernel code from sectors, if letter 'K' shows up, it means that the bootloader failed to do so (too lazy for strings).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnubbsterr%2Fvbb","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnubbsterr%2Fvbb","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnubbsterr%2Fvbb/lists"}