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| author | Kartik K. Agaram <vc@akkartik.com> | 2021-03-14 22:31:42 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-03-14 22:31:42 -0700 |
| commit | 0e5d7e06248c22f663ce6d65e88676dba12f5a48 (patch) | |
| tree | fce97c2a01918440380b561c6349d426039bed3d /boot.subx | |
| parent | 97c0176a1860fbdc122ff306d9ac3d351851ef7e (diff) | |
| download | mu-0e5d7e06248c22f663ce6d65e88676dba12f5a48.tar.gz | |
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Diffstat (limited to 'boot.subx')
| -rw-r--r-- | boot.subx | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/boot.subx b/boot.subx index 8ba735b0..f43bac65 100644 --- a/boot.subx +++ b/boot.subx @@ -146,15 +146,17 @@ # 0x4000 bit = configure linear frame buffer in Bochs emulator; hopefully this doesn't hurt anything when running natively cd/syscall 0x10/imm8/bios-video-services -== data - # load information for the (hopefully) current video mode # mostly just for the address to the linear frame buffer - b4 4f # ah <- 4f (VBE) - b0 01 # al <- 01 (get video mode info) - b9 07 01 # cx <- 0x0107 (mode we requested) + b4/copy-to-ah 0x4f/imm8 # VBE commands + b0/copy-to-al 1/imm8 # get video mode info + b9/copy-to-cx 0x0107/imm16 # mode we requested TODO: incorrect +== data bf 00 81 # di <- 0x8100 (video mode info) [label] - cd 10 +== code + cd/syscall 0x10/imm8/bios-video-services + +== data # switch to 32-bit mode 0f 01 16 # lgdt 00/mod/indirect 010/subop 110/rm/use-disp16 |