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set up serial debug console before first print to the debug board (if enabled)

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git-svn-id: svn://kolibrios.org@4741 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2014-04-03 17:56:55 +00:00
parent 4314e598f6
commit fd06243954
1 changed files with 42 additions and 39 deletions
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81
kernel/trunk/kernel.asm
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@ -715,6 +715,48 @@ no_mode_0x12:
call unmask_timer
stdcall enable_irq, 2 ; @#$%! PIC
stdcall enable_irq, 13 ; co-processor
; Setup serial output console (if enabled)
if defined debug_com_base
; 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
mov dx, debug_com_base+1
mov al, 0x00
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
;-----------------------------------------------------------------------------
; show SVN version of kernel on the message board
;-----------------------------------------------------------------------------
@ -988,45 +1030,6 @@ endg
call boot_log
call setmouse
; Setup serial output console (if enabled)
if defined debug_com_base
; 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
mov dx, debug_com_base+1
mov al, 0x00
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
; START MULTITASKING
; A 'All set - press ESC to start' messages if need