📄 i16.asm
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page ,132
title EXTRA FUNCTIONS IN INT16
;---------------------------------------------------------------;
; NOTE: Do not destroy SS,DS,ES,EBP unless otherwise specified. ;
;---------------------------------------------------------------;
;*****************************************************************;
;*****************************************************************;
;** **;
;** (C)Copyright 1985-1996, American Megatrends Inc. **;
;** **;
;** All Rights Reserved. **;
;** **;
;** 6145-F, Northbelt Parkway, Norcross, **;
;** **;
;** Georgia - 30071, USA. Phone-(770)-246-8600. **;
;** **;
;*****************************************************************;
;*****************************************************************;
;---------------------------------------;
include rt.equ
include makeflag.equ
;---------------------------------------;
extrn empty_8042_input_buffer:near
extrn cmos_data_in_x:near
extrn cmos_data_out_x:near
extrn get_cmos_item:near
;---------------------------------------;
cgroup group _text
_text segment word public 'CODE'
assume cs:cgroup
.486p
;---------------------------------------;
public _I16_STARTS
_I16_STARTS label byte ; marks start of module
;-----------------------------------------------------------------------;
; INT-16.ASM MODULE ;
; this routine gets control from from INT-16 ISR by JMP to support any ;
; special int-16 function if any. if you do not have any special func, ;
; simply return control to INT-16 ISR by JMP. otherwise do the special ;
; function and return control to INT-16 ISR by JMP. ;
; ********************************************************************* ;
; ********************************************************************* ;
; ******* ******* ;
; ******* SPECIAL NOTE ******* ;
; ******* ******* ;
; ******* Do not return control using IRET or RETF 2 ******* ;
; ******* Always return control by JMP instruction ******* ;
; ******* with (AH) unchanged. ******* ;
; ******* special_int_16: ******* ;
; ******* .... ******* ;
; ******* .... ******* ;
; ******* JMP special_int_16_end ******* ;
; ******* ******* ;
; ******* THIS WAS A BUG ON PREVIOUS RELEASES. ******* ;
; ******* IBM-3270 program needs this procedure. ******* ;
; ******* ******* ;
; ******* Final return value of (AH) will be changed ******* ;
; ******* inside original INT-16 routine. ******* ;
; ******* ******* ;
; ******* 07/07/93 ******* ;
; ******* ******* ;
; ********************************************************************* ;
; ********************************************************************* ;
; here is how INT-16 code will look like. ;
;int_16 proc far ;
; ... ;
; jmp special_int_16 ;
;special_int_16_end: ;
; ... ;
; ... ;
;int_16 endp ;
;=======================================================================;
; SPECIAL_INT_16 ;
; input : ;
; ah function# ;
; stack available ;
; register usage -- do not destroy any register including (AH) ;
; ********************************************************************* ;
; ********************************************************************* ;
; ******* ******* ;
; ******* DO NOT DESTROY (AH) ******* ;
; ******* ******* ;
; ********************************************************************* ;
; ********************************************************************* ;
;-----------------------------------------------------------------------;
; New Functions in INT-16
;
; 1. SET CPU SPEED
; Input : AH = function# F0h
; AL = speed
; 00 low speed
; 01 low speed
; 02 high speed
; 03-FF..RESERVED (no action will taken if used)
; Output : None
; Register Destroyed: None
;
; 2. RETURN CURRENT CPU SPEED
; Input : AH = function# F1h
; Output : AL = speed
; 00 low speed
; 01 low speed
; 02 high speed
; Register Destroyed: AL
;
; 3. RETURN CACHE CONTROLLER STATUS
; Input : AH = function# F4h
; AL = 00h
; Output : AL = cache controller status
; 00 not present
; 01 enabled
; 02 disabled
; CX = cache size in KBytes
; bit 15 = 1..cache size information NOT valid
; 0..cache size information valid
; bit 14-0 = cache size in KBytes
; DH = cache write technology
; bit 7 = 1..cache write information NOT valid
; 0..cache write information valid
; bit 6-1 = RESERVED (set to 0)
; bit 0 = 0..write-through cache
; 1..write-back cache
; DL = cache type
; bit 7 = 1..cache type information NOT valid
; 0..cache type information valid
; bit 6-1 = RESERVED (set to 0)
; bit 0 = 0..direct mapped
; 1..2-way set associative
;
; Register Destroyed: AL CX DX if successful
; NONE if status can not be determined
;
; 4. ENABLE CACHE CONTROLLER
; Input : AH = function# F4h
; AL = 01h
; Output : NONE
;
; 5. DISABLE CACHE CONTROLLER
; Input : AH = function# F4h
; AL = 02h
; Output : NONE
;-----------------------------------------------------------------------;
public special_int_16 ; special int 16 func if any
extrn special_int_16_end:near
special_int_16:
;---------------------------------------;
; extra function for new Flash support
push bp
cmp ah,0e0h
jnz si16_00 ; Not E0
movzx bp,al ; BP = subfunc#
sub bp,10h
cmp bp,(offset special_int_16_e0_10_table_end-offset special_int_16_e0_10_table)/2
jae si16_00 ; Not 10h onwards
shl bp,1
cli ; disable interrupt
call [cgroup:special_int_16_e0_10_table+bp]
pop bp
jmp special_int_16_end ; goback to normal INT-16 ISR
si16_00:
pop bp
;---------------------------------------;
push ds
push si
push 0040h
pop ds ; DS = 0040h
mov si,ax
;---------------------------------------;
IF MKF_EXTRA_INT16_F0 ; INT16 Func F0-F4 supported
cmp ah,0f0h ; special func ?
jae sp16_00 ; yes..
ENDIF
;---------------------------------------;
cmp ah,0e0h ; flash func ?
jnz sp16_01 ; no.. jmp to sp16_01 to exit int-16
sp16_e0:
and si,00ffh ; get the function number
cmp si,00ffh ; cpu reset func ?
jnz sp16_03 ; no
mov si,offset cgroup:ah_e0_ff
jmp short sp16_02
sp16_03:
cmp si,(offset special_int_16_e0_table_end-offset special_int_16_e0_table)/2
jae sp16_01 ; invalid func
shl si,1
mov si,[cgroup:special_int_16_e0_table+si]
jmp short sp16_02
sp16_00:
;---------------------------------------;
IF MKF_EXTRA_INT16_F0 ; INT16 Func F0-F4 supported
shr si,08h
and si,000fh
cmp si,(offset special_int_16_table_end-offset special_int_16_table)/2
jae sp16_01 ; invalid func
shl si,1
mov si,[cgroup:special_int_16_table+si]
ENDIF
;---------------------------------------;
sp16_02:
cli ; disable interrupt
call si
sp16_01:
pop si
pop ds
jmp special_int_16_end ; goback to normal INT-16 ISR
;-----------------------------------------------------------------------;
special_int_16_e0_10_table label word
dw offset cgroup:ah_e0_10 ; 10h
dw offset cgroup:ah_e0_11 ; 11h
special_int_16_e0_10_table_end label word
;-----------------------------------------------------------------------;
special_int_16_e0_table label word
dw offset cgroup:ah_e0_0 ; get version no. of bios-flash interface
dw offset cgroup:ah_e0_1 ; byte request for saving chipset env.
dw offset cgroup:ah_e0_2 ; save chipset environment
dw offset cgroup:ah_e0_3 ; restore chipset environment
dw offset cgroup:ah_e0_4 ; set Vpp = low
dw offset cgroup:ah_e0_5 ; set Vpp = high
dw offset cgroup:ah_e0_6 ; flash write protect
dw offset cgroup:ah_e0_7 ; flash write enable
dw offset cgroup:ah_e0_8 ; flash select
dw offset cgroup:ah_e0_9 ; flash deselect
dw offset cgroup:ah_e0_a ; verify allocation memory
dw offset cgroup:ah_e0_b ; save internal cache status
dw offset cgroup:ah_e0_c ; restore internal cache status
special_int_16_e0_table_end label word
;-----------------------------------------------------------------------;
; AH_E0..FLASH PROGRAMMING UTILITY ;
; input : ;
; AH function# E0h ;
; AL subfunction# ;
; DS 0040h ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; register usage : all registers (except return registers) must be ;
; saved except SI ;
;-----------------------------------------------------------------------;
; AH_E0_0..GET VERSION NUMBER OF BIOS-FLASH INTERFACE ;
; input : ;
; AH function# E0h ;
; AL 00 ;
; DS 0040h ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; BX = Version number in BCD format ;
; CX = attribute ;
; bit-0 = 0..A16 inversion not available ;
; 1..A16 inversion available ;
; bit-1 = 0..bootblock not programmable ;
; 1..bootblock portion programmable ;
; bit15-2....reserved for future use (set to 0) ;
; register destroyed : AL, BX, CX ;
;-----------------------------------------------------------------------;
ah_e0_0 proc near
mov bx,350h ; BIOS-FLASH interface ver 3.50
; xor cx,cx
;;;; or cl,1 ; bit-0 = 1..A16 inversion available
;ahe0_0_00::
;;;; or cl,2 ; make bootblock programmable
mov cx,02h
; call off_cyrix ; WT_ALLOC = 0 if Cyrix 6x86 M1
ah_e0_exit::
mov al,0fah ; set success flag
clc
ret
ah_e0_0 endp
;-----------------------------------------------------------------------;
; AH_E0_1..REQUEST NUMBER OF BYTE FOR SAVING CHIPSET ENVIRONMENT ;
; input : ;
; AH function# E0h ;
; AL 01 ;
; DS 0040h ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; BX = # of bytes needed to save chipset environment ;
; register destroyed : AL, BX ;
;-----------------------------------------------------------------------;
ah_e0_1 proc near
mov bx,3h ; 3 bytes needed
jmp short ah_e0_exit
ah_e0_1 endp
;-----------------------------------------------------------------------;
; AH_E0_2..SAVE AND PREPARE CHIPSET ENVIRONMENT ;
; input : ;
; AH function# E0h ;
; AL 02 ;
; DS 0040h ;
; ES:DI pointer to start of buffer where chipset ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; register destroyed : AL ;
;-----------------------------------------------------------------------;
extrn prepare_chipset_for_flash_programming:near
ah_e0_2 proc near
call prepare_chipset_for_flash_programming
jmp short ah_e0_exit
ah_e0_2 endp
;-----------------------------------------------------------------------;
; AH_E0_3..RESTORE CHIPSET ENVIRONMENT ;
; input : ;
; AH function# E0h ;
; AL 03 ;
; DS 0040h ;
; ES:DI pointer to start of buffer where chipset ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; register destroyed : AL ;
;-----------------------------------------------------------------------;
ah_e0_3 proc near
; call check_cyrix ; Cx6x86 M1 found ?
; jnz ah_e0_exit ; no
; Cx6x86 found, return with error, this will force system to reboot even
; in case of non-fatal error
; stc ; error
jmp short ah_e0_exit
;; ret
ah_e0_3 endp
;-----------------------------------------------------------------------;
; AH_E0_4..SET Vpp LOW ;
; input : ;
; AH function# E0h ;
; AL 04 ;
; DS 0040h ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; register destroyed : AL ;
;-----------------------------------------------------------------------;
extrn make_vpp_low:near
extrn Q_USB_LEGACY_ENABLE:abs
ah_e0_4 proc near
call make_vpp_low
mov al,Q_USB_LEGACY_ENABLE
call get_cmos_item
jz ah_e0_exit
pushad
COMMENT ~
mov dx,pac_reg+pac_pam4_index
mov bx,0dc00h
get_usb_segment:
call read_chip_reg
mov ah,al
and al,30h
cmp al,30h
jz get_usb_segment_done
sub bh,04h
and ah,03h
cmp ah,03h
jz get_usb_segment_done
sub bh,04h
dec dx
cmp dl,pac_pam0_index
jnz get_usb_segment
get_usb_segment_done:
movzx ebx,bx
shr ebx,4
~
mov ebx,80000h
mov cl,00h ; Enumerate, Beep
mov ax,2f01h ; Start USB Host
; CALL_RT_FUNCTION
push cs
push offset cgroup:ah_e0_4_0
push cs
push 0e008h
retf
ah_e0_4_0:
popad
jmp short ah_e0_exit
ah_e0_4 endp
;-----------------------------------------------------------------------;
; AH_E0_5..SET Vpp High ;
; input : ;
; AH function# E0h ;
; AL 05 ;
; DS 0040h ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; register destroyed : AL ;
;-----------------------------------------------------------------------;
extrn make_vpp_high:near
ah_e0_5 proc near
call make_vpp_high
mov al,Q_USB_LEGACY_ENABLE
call get_cmos_item
jz ah_e0_exit
push ax
mov ax,2f02h ; Stop USB Host controller
; CALL_RT_FUNCTION
push cs
push offset cgroup:ah_e0_5_0
push cs
push 0e008h
retf
ah_e0_5_0:
pop ax
jmp short ah_e0_exit
ah_e0_5 endp
;-----------------------------------------------------------------------;
; AH_E0_6..FLASH WRITE PROTECT ;
; input : ;
; AH function# E0h ;
; AL 06h ;
; DS 0040h ;
; output: ;
; CY Error ;
; NC Success ;
; AL = 0FAH ;
; register destroyed : AL ;
;-----------------------------------------------------------------------;
extrn flash_write_disable:near
ah_e0_6 proc near
call flash_write_disable
jmp short ah_e0_exit
ah_e0_6 endp
;-----------------------------------------------------------------------;
; AH_E0_7..FLASH WRITE ENABLE ;
; input : ;
; AH function# E0h ;
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