spkr_t.exe - Bad Image : The application or DLL C:\Inetpub\wwwroot\speaker.dll is not a valid Windows image. Please check this against your installation diskette.

format PE GUI 4.0
entry WinMain

include '%fasminc%\win32a.inc'

section '.data' data readable writeable
length dd 44010

section '.code' readable executable
proc WinMain, hInst, hPrevInst, lpCmdLine, nCmdShow
     invoke Speaker, dword[length]
     return
endp

section '.idata' import data readable writeable
library spkr, 'speaker.dll'

import spkr,\
       Speaker, 'Speaker'

section '.reloc' fixups data discardable    

;Copyright © 2004 Peter Moore. All rights reserved

;Redistribution and use in source and binary forms, with or without modification,
;are permitted provided that the following conditions are met:
;
;
;   1. Redistributions of source code must retain the above copyright notice,
;      this list of conditions and the following disclaimer.
;   2. Redistributions in binary form must reproduce the above copyright notice,
;      this list of conditions and the following disclaimer in the documentation
;      and/or other materials provided with the distribution.
;   3. The name of the author may not be used to endorse or promote products
;      derived from this software without specific prior written permission.
;
;THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
;WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
;MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
;EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
;SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
;PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
;OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
;OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
;ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.;

format PE GUI 4.0 DLL
entry DllStart

include '%fasminc%\win32a.inc'

section '.data' data readable writeable
nop

section '.code' code readable executable
proc DllStart, hInstDLL, fdwReason, lpvReserved
     enter
     invoke GetModuleHandle, 0
     mov eax, TRUE
     return
endp

SpeakerOn:
     in al, 0x61
     and al, 0xFC
     out 0x61, al
     ret

SpeakerOff:
     in al, 0x61
     or al, 2
     out 0x61, al
     ret

proc Speaker, length
     call SpeakerOn
     mov cx, word [length]
     spkrLoop:
        call SpeakerOff
        call SpeakerOn
     loop spkrLoop
     mov eax, 0
     return
endp

section '.idata' import data readable writeable
library kernel, 'kernel32.dll'
import kernel, GetModuleHandle, 'GetModuleHandleA'

section '.edata' export data readable
export 'speaker.dll',\
       Speaker, 'Speaker',\
       SpeakerOn, 'SpeakerOn',\
       SpeakerOff, 'SpeakerOff'

section '.reloc' fixups data discardable