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loadwarka
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Fix reading of sectors

This commit is contained in:
Alex Kotov 2022-01-27 06:26:59 +05:00
parent dda55b3972
commit 969201e229
Signed by: kotovalexarian
GPG Key ID: 553C0EBBEB5D5F08
1 changed files with 18 additions and 7 deletions
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25
src/x86_stage1.S
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@ -89,39 +89,47 @@ main:
inc %ax
no_rem:
// AX - number of sectors
push %ax
call print_number_of_sectors
pop %ax
// BX - address
pop %cx
mov $STAGE2_BASE, %bx
mov $2, %ax
// AX - number of sector to read
// BX - address
// CX - total number of sectors
read_loop:
add $512, %bx
dec %ax
test %ax, %ax
inc %ax
test %ax, %cx
jz finish
push %ax
push %bx
push %cx
mov $STAGE1_ADDR(reading_sector), %si
call print_str
pop %cx
pop %bx
pop %ax
push %ax
push %bx
push %cx
call print_number
mov $STAGE1_ADDR(to_address), %si
call print_str
pop %cx
pop %bx
pop %ax
push %ax
push %bx
push %cx
mov %bx, %ax
call print_number
@ -129,11 +137,13 @@ read_loop:
mov $STAGE1_ADDR(newline), %si
call print_str
pop %cx
pop %bx
pop %ax
push %ax
push %bx
push %cx
mov %al, %cl // Cylinder and sector
mov $0x02, %ah
mov $1, %al // Sectors count
@ -141,9 +151,10 @@ read_loop:
mov $0, %ch // Cylinder
mov $0, %dh // Head
int $0x13
pop %cx
pop %bx
pop %ax
jmp read_loop
finish: