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|
;
; writechr: Write a single character in AL to the console without
; mangling any registers; handle video pages correctly.
;
section .text16
writechr:
call write_serial ; write to serial port if needed
pushfd
test byte [cs:UsingVGA], 08h
jz .videook
call vgaclearmode
.videook:
test byte [cs:DisplayCon], 01h
jz .nothing
pushad
mov ah,0Eh
mov bl,07h ; attribute
mov bh,[cs:BIOS_page] ; current page
int 10h
popad
.nothing:
popfd
ret
|
