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This commit is contained in:
Kartik K. Agaram 2021-03-21 22:33:33 -07:00
parent 0c3f126377
commit 2718cb453c
1 changed files with 3 additions and 3 deletions
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6
boot.subx
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@ -942,7 +942,7 @@ read-a-sector:
}
# kick off read
(ata-drive-select 0xf0) # primary bus, secondary drive; 4 LSBs contain 4 upper bits of LBA (here 0)
(ata-error 0)
(clear-ata-error)
(ata-sector-count 1)
(ata-lba 0 0 0) # lower 24 bits of LBA
(ata-command 0x20) # read sectors with retries
@ -990,7 +990,7 @@ $ata-drive-select:end:
5d/pop-to-ebp
c3/return
ata-error: # n: byte
clear-ata-error:
# . prologue
55/push-ebp
89/<- %ebp 4/r32/esp
@ -998,7 +998,7 @@ ata-error: # n: byte
50/push-eax
52/push-edx
#
8b/-> *(ebp+8) 0/r32/eax
b8/copy-to-eax 0/imm32
ba/copy-to-edx 0x1f1/imm32
ee/write-al-into-port-dx
$ata-error:end: