diff options
Diffstat (limited to 'src/kernel/graphics/vesa.asm')
| -rw-r--r-- | src/kernel/graphics/vesa.asm | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/src/kernel/graphics/vesa.asm b/src/kernel/graphics/vesa.asm deleted file mode 100644 index 820d592..0000000 --- a/src/kernel/graphics/vesa.asm +++ /dev/null @@ -1,182 +0,0 @@ -global vbe_set_mode -global vbe_find_mode - -vbe_set_mode: - mov [width], ax - mov [height], bx - mov [bpp], cl - - sti - - ; Get VBE BIOS info - push es - mov ax, 0x4F00 - mov di, [vbe_info] - int 0x10 - pop es - - ; Check if BIOS has VBE support - cmp ax, 0x4F - jne error - - mov ax, word[vbe_info.video_modes] - mov [offset], ax - mov ax, word[vbe_info.video_modes+2] - mov [mode_segment], ax - - mov ax, [mode_segment] - mov fs, ax - mov si, [offset] - -vbe_find_mode: - mov dx, [fs:si] - add si, 2 - mov [offset], si - mov [mode], dx - mov ax, 0 - mov fs, ax - - cmp [mode], word 0xFFFF - je error - - ; Get VBE mode info - push es - mov ax, 0x4F01 - mov cx, [mode] - mov di, [vbe_mode_info] - int 0x10 - pop es - - cmp ax, 0x4F - jne error - - mov ax, [width] - cmp ax, [vbe_mode_info.width] - jne next_mode - - mov ax, [height] - cmp ax, [vbe_mode_info.height] - jne next_mode - - mov al, [bpp] - cmp al, [vbe_mode_info.bpp] - jne next_mode - - ; Found best mode! - mov ax, [width] - mov word[vbe_best.width], ax - mov ax, [height] - mov word[vbe_best.height], ax - mov eax, [vbe_mode_info.framebuffer] - mov dword[vbe_best.framebuffer], eax - mov ax, [vbe_mode_info.pitch] - mov word[vbe_best.bytes_per_line], ax - mov eax, 0 - mov al, [bpp] - mov byte[vbe_best.bpp], al - shr eax, 3 - mov dword[vbe_best.bytes_per_pixel], eax - - mov ax, [width] - shr ax, 3 - dec ax - mov word[vbe_best.x_cur_max], ax - - mov ax, [height] - shr ax, 4 - dec ax - mov word[vbe_best.y_cur_max], ax - - ; Set the mode - push es - mov ax, 0x4F02 - mov bx, [mode] - or bx, 0x4000 - mov di, 0 - int 0x10 - pop es - - cmp ax, 0x4F - jne error - - clc - ret - -next_mode: - mov ax, [mode_segment] - mov fs, ax - mov si, [offset] - jmp vbe_find_mode - -error: - stc - ret - -width dw 0 -height dw 0 -bpp db 0 -mode_segment dw 0 -offset dw 0 -mode dw 0 - -vbe_info: - .signature db "VESA" - .version dw 0 - .oem dd 0 - .capabilities dd 0 - .video_modes dd 0 - .video_memory dw 0 - .software_rev dw 0 - .vendor dd 0 - .product_name dd 0 - .product_rev dd 0 - .reserved times 222 db 0 - .oem_data times 256 db 0 - -vbe_mode_info: - .attributes dw 0 - .window_a db 0 - .window_b db 0 - .granularity dw 0 - .window_size dw 0 - .segment_a dw 0 - .segment_b dw 0 - .win_func_ptr dd 0 - .pitch dw 0 - .width dw 0 - .height dw 0 - .w_char db 0 - .y_char db 0 - .planes db 0 - .bpp db 0 - .banks db 0 - .memory_model db 0 - .bank_size db 0 - .image_pages db 0 - .reserved0 db 0 - - .red_mask db 0 - .red_position db 0 - .green_mask db 0 - .green_position db 0 - .blue_mask db 0 - .blue_position db 0 - .reserved_mask db 0 - .reserved_position db 0 - .direct_color_attributes db 0 - - .framebuffer dd 0 - .off_screen_mem_off dd 0 - .off_screen_mem_size dw 0 - .reserved1 times 206 db 0 - -vbe_best: - .bpp db 0 - .height dw 0 - .width dw 0 - .mode dw 0 - .framebuffer dd 0 - .bytes_per_line dw 0 - .bytes_per_pixel dd 0 - .x_cur_max dw 0 - .y_cur_max dw 0
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