diff options
| author | Kartik K. Agaram <vc@akkartik.com> | 2021-03-14 23:04:00 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-03-14 23:04:00 -0700 |
| commit | 5c1186a77b917625171aebf8abf2bc9e6a911114 (patch) | |
| tree | dad2be055d7c9f8324fc164b3f008e02db54161a /boot.subx | |
| parent | fba0a56add2202403ee7329751694687cbca6966 (diff) | |
| download | mu-5c1186a77b917625171aebf8abf2bc9e6a911114.tar.gz | |
fix a few TODOs that mutate the expected binary
Diffstat (limited to 'boot.subx')
| -rw-r--r-- | boot.subx | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/boot.subx b/boot.subx index 78680400..0db21e32 100644 --- a/boot.subx +++ b/boot.subx @@ -97,9 +97,7 @@ 8e/seg-> 3/mod/direct 3/rm32/bx 0/r32/es bb/copy-to-bx 0x7e00/imm16 cd/syscall 0x13/imm8/bios-disk-services -== data - 0f 82 a3 00 # jump-if-carry disk_error [label] -== code + 0f 82/jump-if-carry disk_error/disp16 # load two more tracks of disk into addresses [0x17800, 0x27400) b4/copy-to-ah 2/imm8 # read sectors from disk @@ -113,9 +111,7 @@ 8e/seg-> 3/mod/direct 3/rm32/bx 0/r32/es bb/copy-to-bx 0/imm16 cd/syscall 0x13/imm8/bios-disk-services -== data - 0f 82 9b 00 # jump-if-carry disk_error [label] -== code + 0f 82/jump-if-carry disk_error/disp16 # load two more tracks of disk into addresses [0x27400, 0x37000) b4/copy-to-ah 2/imm8 # read sectors from disk @@ -129,9 +125,7 @@ 8e/seg-> 3/mod/direct 3/rm32/bx 0/r32/es bb/copy-to-bx 0/imm16 cd/syscall 0x13/imm8/bios-disk-services -== data - 0f 82 9b 00 # jump-if-carry disk_error [label] -== code + 0f 82/jump-if-carry disk_error/disp16 # reset es bb/copy-to-bx 0/imm16 @@ -150,7 +144,7 @@ # mostly just for the address to the linear frame buffer 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 + b9/copy-to-cx 0x0105/imm16 # mode we requested == data bf 00 81 # di <- 0x8100 (video mode info) [label] == code @@ -182,7 +176,7 @@ 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 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 00 00 00 00 00 00 00 00 00 == code @@ -197,7 +191,7 @@ disk_error: 89/<- 0/mod/indirect 7/rm32/bx 0/r32/ax # *ds:bx <- ax # loop forever { - e9/jump loop/disp16 # TODO: make this disp8 + eb/jump loop/disp8 } ## GDT: 3 records of 8 bytes each |