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t i t l e . P R O C E S S O R _ T I M E R _ P A R I T Y _ R E F R E S H _ N M I T E S T ; * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ; ; * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ; ; * * * * ; ; * * ( C ) C o p y r i g h t 1 9 8 5 -1996, American Megatrends Inc. **; ;** **; ;** All Rights Reserved. **; ;** **; ;** 6145-F, Northbelt Parkway, Norcross, **; ;** **; ;** Georgia - 30071, USA. Phone-(770)-246-8600. **; ;** **; ;*****************************************************************; ;*****************************************************************; ;---------------------------------------; include mbiosequ.equ ; bios global constants include mbiosmac.mac ; bios coding macro definition include cf.equ ;---------------------------------------; extrn check_point_no_stack:near extrn check_point_stack:near
public bios_suru public shutdown_0 public shutdown_77 public shutdown_88
extrn shutdown_1:near ; shutdown after memory error extrn shutdown_2:near ; v_mode exception intr error extrn _shutdown_33:near ; shutdown after memory test extrn shutdown_4:near ; boot loader request shutdown extrn shutdown_5:near ; user defined shutdown routine extrn _shutdown_66:near ; shutdown during memory test to display memory size extrn shutdown_7:near ; unused, (chipset memory detection) extrn shutdown_8:near ; unused, (soft reset) extrn shutdown_9:near ; shutdown after block move extrn shutdown_a:near ; user defined shutdown routine
extrn init_8259_80287:near ; shut 4/5, init 8259, 80287 extrn disable_video:near extrn clear_64k_memory:near extrn int_isr:near
extrn _power_on_delay:byte extrn _software_delay:byte extrn ram_segment:word extrn flush_all_cache:near
extrn power_on_init:near public power_on_init_end extrn hreset_clear:near public hreset_clear_end extrn sreset_clear:near public sreset_clear_end extern StopUsbHostController(dummy_ret):near extrn dummy_ret:near extrn disable_all_cache:near extrn shutdown_init:near public shutdown_init_end extrn decompress_post_init:near ;---------------------------------------; ; C O D E S E G M E N T ; ;---------------------------------------; cgroup group _text _text segment word public 'CODE' assume cs:cgroup .486p ;---------------------------------------; public _BIOS_STARTS _BIOS_STARTS label byte ; marks start of module ;---------------------------------------; ; FLAGS TEST (SF,ZF,PF,CF) ; ; ;---;---;---;---;---;---;---;---; ; ; ; S ; Z ; x ; A ; x ; P ; x ; C ; ; ; ;---;---;---;---;---;---;---;---; ; ; HARD RESET OR SHUTDOWN RESET ; ;---------------------------------------; ; SHUTDOWN PROCESSING ; ;---------------------------------------; bios_suru: cli ; test under CLI mode cld ; ensure direction mov ax,cs mov ss,ax ; $$$CORE0036+ >>> extern wake_up(wake_up_end):near public wake_up_end jmp wake_up ; check for wakeup wake_up_end: ; control will come here only if wake up is not needed ; $$$CORE0036+ <<< jmp power_on_init power_on_init_end: in al,kb_stat_port ; if sys_flag bit is set test al,00000100b ; then soft reset else power on jnz shut_5 ; not power-on ;---------------------------------------; ; VANILLA MEMORY PATCH ; ;---------------------------------------; ifdef VANILLA_BIOS ;---------------------------------------; ; save CPUID in cmos 35h(DL), 36h(DH) extrn cmos_data_out:near extrn _refresh_value:byte mov ebp,edx mov al,0b5h mov ah,dl ret_sp cmos_data_out mov al,0b6h mov ah,dh ret_sp cmos_data_out ; start memory refresh.. mov al,00h ; initialise DMA-PAGE reg. out 8fh,al ; (used in MEMORY REFRESH) io_delay mov al,01010100b ; start CH_1 (REFRESH) out 43h,al ; one byte count used io_delay mov al,cgroup:_refresh_value; low byte count OUT 41H,AL MOV CX,100H ; 400h..01/11/95 XOR DI,DI MOV ES,DI wpulse1: stosb loop wpulse1 ;---------------------------------------; extrn vanilla_patch_offset:near cmp cgroup:word ptr vanilla_patch_offset,0ffffh jz ret_off ; no routine mov sp,offset cgroup:sp_ret_off jmp vanilla_patch_offset-1 even sp_ret_off: dw offset cgroup:ret_off dw 0f000h ret_off: endif ;---------------------------------------; jmp hreset_clear ; hard reset init (if any) ;;;;hreset_clear_end: ;;;; jmp shutdown_0x ; hard reset, goto regs. test shut_5: jmp sreset_clear ; GA20 disable and other.... sreset_clear_end: mov al,8fh ; shutdown address out cmos_addr_port,al ; mask NMI & select shut byte jcxz short $+2 ; i/o delay jcxz short $+2 ; i/o delay IN AL,CMOS_DATA_PORT ; read shutdown code mov ah,00 MOV SI,AX ; save in (SI) MOV AL,8FH ; shutdown address JCXZ SHORT $+2 ; i/o delay OUT CMOS_ADDR_PORT,AL mov al,00 ; clear shutdown byte jcxz short $+2 ; i/o delay jcxz short $+2 ; i/o delay out cmos_data_port,al mov ax,cs mov ss,ax mov ax,si ; restore shutdown code cmp al,04h ; for BOOT loader shutdown jz shut_1 ; & for USER defined shutdown
