;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
;* This program reads a CMOS memory image (128 bytes)          *;
;* from STDIN and then writes it into the CMOS memory.         *;
;* ----------------------------------------------------------- *;
;* CAUTION: Always make a backup copy of your CMOS memory      *;
;* (by SAVECMOS) before using this program!                    *;
;* ----------------------------------------------------------- *;
;* THIS SOURCE CODE IS FREEWARE.                               *;
;* USE THIS PROGRAM AT YOUR OWN RISK.                          *;
;*                                                             *;
;*                Written by Zsolt Nagy Perge in Dec. 5. 1998. *;
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
CODE            SEGMENT
ORG             00100h
ASSUME          CS:CODE
ASSUME          DS:CODE
ASSUME          ES:CODE
ASSUME          SS:CODE
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
;* CONSTANTS                                                   *;
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
CMOSSIZE        EQU     128                             ; CMOS memory size
STACKSIZE       EQU     8192                            ; Stack size
Buffer          EQU     0FFFFh - STACKSIZE - CMOSSIZE   ; Buffer address
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
;* PROGRAM ENTRY                                               *;
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
Entry:

	; Read CMOS Memory Image from STDIN...
				MOV     AH,03Fh     ; Tell DOS to read...
				XOR     BX,BX       ; File Handle (STDIN)
				MOV     CX,CMOSSIZE ; Number of bytes to read
				MOV     DX,Buffer   ; Buffer
				INT     021h        ; Read.

	; Setup for LODSB...
				MOV     SI,Buffer + CMOSSIZE - 1
									; Calculate Start Address
				STD                 ; Set Direction Flag. (This will cause
									; LODSB to decrement SI each time...)

WriteBYTE:

	; Write one byte into the CMOS memory...
				MOV     AL,CL       ; AL = CL (counter)
				DEC     AL          ; Decrement AL
				OUT     070h,AL     ; Address CMOS (AL)
				LODSB               ; Load byte into AL
				OUT     071h,AL     ; Write AL to CMOS

	; Loop until all written...
				LOOP    WriteBYTE   ; Loop, until CX is zero...

	; Terminate program.
				RET                 ; Return to DOS...
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;
CODE            ENDS
END             Entry
;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *;