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Serial debug console: reserve port so nobody else uses it.

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git-svn-id: svn://kolibrios.org@4553 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2014-02-01 14:22:21 +00:00
parent b08574ec1d
commit 7441360013
1 changed files with 8 additions and 9 deletions
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17
kernel/trunk/kernel.asm
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@ -1079,27 +1079,29 @@ endg
DEBUGF 1, "K : IRQ1 error code %x\n", eax
.no_keyboard:
; SET MOUSE
; Load PS/2 mouse driver
stdcall load_driver, szPS2MDriver
; stdcall load_driver, szCOM_MDriver
mov esi, boot_setmouse
call boot_log
call setmouse
; Setup serial output console (if enabled)
if defined debug_com_base
; enable Divisor latch
; reserve port so nobody else will use it
xor ebx, ebx
mov ecx, debug_com_base
mov edx, debug_com_base+7
call r_f_port_area
; enable Divisor latch
mov dx, debug_com_base+3
mov al, 1 shl 7
out dx, al
; Set speed to 115200 baud (max speed)
mov dx, debug_com_base
mov al, 0x01
out dx, al
@ -1109,25 +1111,22 @@ if defined debug_com_base
out dx, al
; No parity, 8bits words, one stop bit, dlab bit back to 0
mov dx, debug_com_base+3
mov al, 3
out dx, al
; disable interrupts
mov dx, debug_com_base+1
mov al, 0
out dx, al
; clear + enable fifo (64 bits)
mov dx, debug_com_base+2
mov al, 0x7 + 1 shl 5
out dx, al
end if
mov eax, [version_inf.rev]
DEBUGF 1, "K : kernel SVN r%d\n", eax