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| author | Kartik K. Agaram <vc@akkartik.com> | 2021-03-16 12:46:53 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-03-16 12:46:53 -0700 |
| commit | eae5483bf6d1f163680e93c198ae5a502a44bdc7 (patch) | |
| tree | 644a4d6154810587660357e1395449687163faff /boot.subx | |
| parent | 697f1e7516d5528a99c64fe94a73d4663d0f0d2a (diff) | |
| download | mu-eae5483bf6d1f163680e93c198ae5a502a44bdc7.tar.gz | |
.
Diffstat (limited to 'boot.subx')
| -rw-r--r-- | boot.subx | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/boot.subx b/boot.subx index 412940d6..9374557f 100644 --- a/boot.subx +++ b/boot.subx @@ -196,7 +196,7 @@ initialize_32bit_mode: bc/copy-to-esp 0x00070000/imm32 - # load interrupt handlers + ## load interrupt handlers # We can't refer to the label directly because SubX doesn't do the right # thing for lidt, so rather than make errors worse in most places we instead # pin idt_descriptor below. @@ -216,6 +216,8 @@ initialize_32bit_mode: e6/write-al-into-port 0x21/imm8 fb/enable-interrupts + + ## enable floating point db/floating-point-coprocessor e3/initialize # eax <- cr4 0f 20/<-cr 3/mod/direct 0/rm32/eax 4/r32/cr4 @@ -223,6 +225,7 @@ initialize_32bit_mode: 0f ba/bit-test 5/subop/bit-test-and-set 3/mod/direct 0/rm32/eax 9/imm8 # cr4 <- eax 0f 22/->cr 3/mod/direct 0/rm32/eax 4/r32/cr4 + e9/jump Entry/disp32 == boot-sector-marker 0x7dfe |