diff options
| author | Kartik Agaram <vc@akkartik.com> | 2020-12-22 17:01:54 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-12-23 00:04:20 -0800 |
| commit | 2b61e5e0a02e6c4bd919c842ecf74ff3e089ec73 (patch) | |
| tree | c7a89c5cb20460dce87b8c9dba8e81b6374deb36 | |
| parent | 6216a79974d2742bc454f722a28a3ed934f269c6 (diff) | |
| download | mu-2b61e5e0a02e6c4bd919c842ecf74ff3e089ec73.tar.gz | |
7376
| -rw-r--r-- | apps/boot.hex | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/apps/boot.hex b/apps/boot.hex index ec32103c..3157ce58 100644 --- a/apps/boot.hex +++ b/apps/boot.hex @@ -32,7 +32,8 @@ # to the address range [0x7c00, 0x7e00) # 00: - fa # cli # TODO: don't forget to reenable interrupts in a real program + # disable interrupts for this initialization + fa # cli # initialize segment registers # this isn't always needed, but is considered safe not to assume @@ -147,11 +148,14 @@ e9 fb ff # loop forever 8e c0 # es <- ax 8e e0 # fs <- ax 8e e8 # gs <- ax + + # initialization is done; enable interrupts + fb e9 1d 00 00 00 # jump to 0x7cf0 # padding -# d3: - 00 00 00 00 00 00 00 00 00 00 00 00 00 +# d4: + 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ## 'application' SubX code: print one character to top-left of screen |