diff options
| author | Kartik Agaram <vc@akkartik.com> | 2020-12-20 20:51:15 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-12-20 20:51:15 -0800 |
| commit | d26836caae389e82efae57650a5a386a1386f14f (patch) | |
| tree | 0df8a32d3d92be8712feb348807df2f946844e63 /apps/bos/32bit.hex | |
| parent | c1ffd4c0a6b7ab0847a77e82259c2268ee45a57e (diff) | |
| download | mu-d26836caae389e82efae57650a5a386a1386f14f.tar.gz | |
7364
Diffstat (limited to 'apps/bos/32bit.hex')
| -rw-r--r-- | apps/bos/32bit.hex | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/apps/bos/32bit.hex b/apps/bos/32bit.hex index e05ebf0a..842a3b57 100644 --- a/apps/bos/32bit.hex +++ b/apps/bos/32bit.hex @@ -18,7 +18,7 @@ # We don't read or write the stack before we get to 32-bit mode. # 00: - fa + fa # cli # TODO: don't forget to reenable interrupts at some point 0f 01 16 # lgdt 00/mod/indirect 010/subop 110/rm32/TODO 38 7c # *gdt_descriptor 0f 20 c0 # eax <- cr0 @@ -83,16 +83,17 @@ ## 'application' SubX code: print one character to top-left of screen # 70: -# *0xb8000 <- 0x0f48 -c7 # opcode - # modrm - 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 - # disp32 - 00 80 0b 00 - # imm32 - 48 # 'H' - 0f # white on black - 00 00 +# Entry: + # *0xb8000 <- 0x0f48 + c7 # opcode + # modrm + 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 + # disp32 + 00 80 0b 00 + # imm32 + 48 # 'H' + 0f # white on black + 00 00 e9 fb ff ff ff # loop forever |