BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Port I/O          BorlandTalk.com Forum Index -> C++ Builder (Native API) View previous topic :: View next topic   Author Message Tom Jackson Guest Posted: Fri Mar 11, 2005 5:16 pm    Post subject: Port I/O What happened to inp(), outp() etc? I just need to read and write to port 61h. asm fails because it requires protected mode and it seems inp() and outp() are no longer in conio.h I can declare the routines myself but it seems that are not in the runtime either. Can anyone point me in the right direction? Back to top Remy Lebeau (TeamB) Guest Posted: Fri Mar 11, 2005 5:57 pm    Post subject: Re: Port I/O "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote Quote: What happened to inp(), outp() etc? They were done away with. The OS protects against direct access to hardware now. You have to use device drivers to control hardware. Quote: I just need to read and write to port 61h. What exactly are you trying to accomplish in the first place? Quote: asm fails because it requires protected mode and it seems inp() and outp() are no longer in conio.h Correct. Gambit Back to top Tom Jackson Guest Posted: Fri Mar 11, 2005 9:34 pm    Post subject: Re: Port I/O Thanks. I am trying to write a simple sound routine to the built in PC Speaker. This is for experimental and learning purposes. I must figure out how to talk to the driver. Can you point me in the right direction? Tom "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote Quote: "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote in message news:4231d1ea$1 (AT) newsgroups (DOT) borland.com... What happened to inp(), outp() etc? They were done away with. The OS protects against direct access to hardware now. You have to use device drivers to control hardware. I just need to read and write to port 61h. What exactly are you trying to accomplish in the first place? asm fails because it requires protected mode and it seems inp() and outp() are no longer in conio.h Correct. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Fri Mar 11, 2005 10:04 pm    Post subject: Re: Port I/O "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote Quote: I am trying to write a simple sound routine to the built in PC Speaker. This is for experimental and learning purposes. I must figure out how to talk to the driver. Can you point me in the right direction? You don't need to access a driver for that. In WinNT/2K/XP/2K3, use the Beep() function. In Win9x/Me, you can gain access to the PC speaker via inline assembly. For example: #pragma inline BYTE inp(WORD Port) { asm { mov dx, Port in al, dx } void outp(WORD Port, BYTE Value) { asm { mov dx, Port mov al, Value out dx, al } } void setfreq(WORD Hz) { Hz = 1193180 / Hz; // clocked at 1.19MHz outp(0x43, 0xB6); // timer 2, square wave outp(0x42, Hz); outp(0x42, Hz >> ; } void Sound(WORD Frequency, WORD Duration) { if( Win32Platform == VER_PLATFORM_WIN32_WINDOWS ) { outp(0x61, inp(0x61) | 0x03); // start speaker going setfreq(Frequency); ::Sleep(Duration); outp(0x61, inp(0x61) & ~0x03); // stop that racket! } else if( Win32Platform == VER_PLATFORM_WIN32_NT ) ::Beep(Frequency, Duration); } Gambit Back to top Jonathan Benedicto Guest Posted: Fri Mar 11, 2005 10:14 pm    Post subject: Re: Port I/O What about a component off torry.net ? http://www.torry.net/pages.php?id=183 -- Jonathan "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote Quote: You don't need to access a driver for that. In WinNT/2K/XP/2K3, use the Beep() function. In Win9x/Me, you can gain access to the PC speaker via inline assembly. For example: Back to top Tom Jackson Guest Posted: Fri Mar 11, 2005 10:57 pm    Post subject: Re: Port I/O An asm in or out instruction raises EPriviledge exception. I don't want to use Beep() because it is not powerful enough for what I want to do. The components/code from Torry's Delphi Pages uses the in and out instructions too. Apparently under win9x and me the in and out instruction are not privileged. At least under win2k it seems I cannot access the speaker! "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote Quote: "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote in message news:42320e6a (AT) newsgroups (DOT) borland.com... I am trying to write a simple sound routine to the built in PC Speaker. This is for experimental and learning purposes. I must figure out how to talk to the driver. Can you point me in the right direction? You don't need to access a driver for that. In WinNT/2K/XP/2K3, use the Beep() function. In Win9x/Me, you can gain access to the PC speaker via inline assembly. For example: #pragma inline BYTE inp(WORD Port) { asm { mov dx, Port in al, dx } void outp(WORD Port, BYTE Value) { asm { mov dx, Port mov al, Value out dx, al } } void setfreq(WORD Hz) { Hz = 1193180 / Hz; // clocked at 1.19MHz outp(0x43, 0xB6); // timer 2, square wave outp(0x42, Hz); outp(0x42, Hz >> ; } void Sound(WORD Frequency, WORD Duration) { if( Win32Platform == VER_PLATFORM_WIN32_WINDOWS ) { outp(0x61, inp(0x61) | 0x03); // start speaker going setfreq(Frequency); ::Sleep(Duration); outp(0x61, inp(0x61) & ~0x03); // stop that racket! } else if( Win32Platform == VER_PLATFORM_WIN32_NT ) ::Beep(Frequency, Duration); } Gambit Back to top Tom Jackson Guest Posted: Fri Mar 11, 2005 10:58 pm    Post subject: Re: Port I/O They all seem to use the asm in and out instructions which are privileged under win2k "Jonathan Benedicto" <incorrect (AT) no (DOT) server> wrote Quote: What about a component off torry.net ? http://www.torry.net/pages.php?id=183 -- Jonathan "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote in message news:423215d9$1 (AT) newsgroups (DOT) borland.com... You don't need to access a driver for that. In WinNT/2K/XP/2K3, use the Beep() function. In Win9x/Me, you can gain access to the PC speaker via inline assembly. For example: Back to top Remy Lebeau (TeamB) Guest Posted: Fri Mar 11, 2005 11:05 pm    Post subject: Re: Port I/O "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote Quote: They all seem to use the asm in and out instructions which are privileged under win2k Bleepint and BTBeeper execute the assembly instructions only under Win9x, and use Beep() under WinNT. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Fri Mar 11, 2005 11:10 pm    Post subject: Re: Port I/O "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote Quote: An asm in or out instruction raises EPriviledge exception. Only on NT-based systems, which is why you need to use Beep() for those systems instead. On Win9x, the instructions are not privileged. Quote: I don't want to use Beep() because it is not powerful enough for what I want to do. What EXACTLY are you trying to accomplish? The PC speaker is not very powerful to begin with. Quote: The components/code from Torry's Delphi Pages uses the in and out instructions too. Apparently under win9x and me the in and out instruction are not privileged. At least under win2k it seems I cannot access the speaker! Two of the components at Torry can work fine on both 9x and NT systems. Gambit Back to top Bruce Salzman Guest Posted: Fri Mar 11, 2005 11:26 pm    Post subject: Re: Port I/O "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote Quote: An asm in or out instruction raises EPriviledge exception. I don't want to use Beep() because it is not powerful enough for what I want to do. Can you find an old computer running DOS? Seriously, the PC speaker has always been a problem for Windows. In order to produce sounds, you need the timer chip, which is being used for other things. That's why the WinAPI doesn't expose much of an interface for it (Beep() and MessageBeep(0xFFFF), and those grundgingly). What you want to do was commonplace 10 or 20 years ago, but the PC has moved on. Regards, Bruce Back to top Tom Jackson Guest Posted: Sat Mar 12, 2005 3:35 am    Post subject: Re: Port I/O Its simplicity was what I wanted. I hoped to demonstrate some simple DSP and sound theory in the simplest of environments before moving on to the more complex. Back in the pre-dos days, I managed to get the color computer (a z-80 based machine with a cassette tape drive) to play some pretty complex music. Oh well, I will just have to re-think it. Thanks for your efforts! Tom " Bruce Salzman" <bruce (AT) nospam (DOT) org> wrote Quote: "Tom Jackson" <tjax (AT) comcast (DOT) net> wrote in message news:423221e8 (AT) newsgroups (DOT) borland.com... An asm in or out instruction raises EPriviledge exception. I don't want to use Beep() because it is not powerful enough for what I want to do. Can you find an old computer running DOS? Seriously, the PC speaker has always been a problem for Windows. In order to produce sounds, you need the timer chip, which is being used for other things. That's why the WinAPI doesn't expose much of an interface for it (Beep() and MessageBeep(0xFFFF), and those grundgingly). What you want to do was commonplace 10 or 20 years ago, but the PC has moved on. 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