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Fixes for real hardware

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This commit is contained in:
Jeremy Soller 2016-08-24 20:31:59 -06:00
commit c2a95c96d5
1 changed files with 32 additions and 32 deletions
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10
bootloader/x86/startup-common.asm
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@ -14,7 +14,7 @@ startup:
; buffersize in multiple of sectors (512 Bytes)
; min 1
; max (0x70000 - startup_end) / 512
buffer_size_sectors equ 1
buffer_size_sectors equ 512
; buffer size in Bytes
buffer_size_bytes equ buffer_size_sectors * 512
@ -32,7 +32,7 @@ kernel_base equ 0x100000
; populating buffer
mov cx, buffer_size_sectors
mov bx, startup_end
mov bx, kernel_file
mov dx, 0x0
push ax
@ -42,7 +42,7 @@ kernel_base equ 0x100000
call unreal
pop ax
mov esi, startup_end
mov esi, kernel_file
mov ecx, buffer_size_bytes / 4
a32 rep movsd
@ -57,14 +57,14 @@ kernel_base equ 0x100000
test cx, cx
jz finished_loading ; if cx = 0 => skip
mov bx, startup_end
mov bx, kernel_file
mov dx, 0x0
call load
; moving remnants of kernel
call unreal
mov esi, startup_end
mov esi, kernel_file
mov ecx, (kernel_file.length_sectors % buffer_size_bytes) / 4
a32 rep movsd
finished_loading: