summaryrefslogtreecommitdiffstats
path: root/arch/x86/boot/bios.inc
blob: d01b27cc9681fde50f3d024edcdb3a6c801a9ce8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
.macro BIOS_PRINT string
	mov $0x0e, %ah				# Set writing char in TTY mode routine
	mov \string, %si			# Set in Source Index reg the beginning
								# address of a string
print_loop\@:
	lodsb						# Increase SI by 1 byte => get next char
	or %al, %al					# Check for a '\0'
	jz print_done\@

	int $0x10					# Print a char in al register
	jmp print_loop\@
print_done\@:
.endm

.macro PUTCHAR char
	mov $0x0e, %ah				# Set writing char in TTY mode routine
	mov \char, %al
	int $0x10					# Print a char in al register
.endm