DOSBox PC beeper and turbo off \ VOGONS

DOSBox PC beeper and turbo off

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First post, by john00001

Posted on 2013-10-29, 01:46

john00001 Offline

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Does anyone know how to set the PC beeper to work on DOSBox ? Currently beeper sounds are going through the soundcard. I think it its in dosbox.conf ?

Also, is there any way to set the turbo off, like a turbo button (i.e. at 4.77 mhz) ? I can use ALT-f11 but I don't know what speed old CGA games are supposed to be.

Reply 1 of 8, by mr_bigmouth_502

Posted on 2013-10-29, 01:59

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DosBox is intended to be a multiplatform program, and as such they won't be adding PC speaker output, at least not in any official builds.

Also, due to the way instructions are emulated on DosBox (with each instruction taking exactly 1 clock cycle), it's impossible to really replicate the speed of any particular CPU.

If you're looking for something that better approximates the speed of a PC XT, I highly recommend this program. http://www.picofactory.com/free/software/pc-xt-emulator/ It's not well known, but I used to use it to play old CGA games many years back. All you need is a 360k DOS boot image, and some way of injecting your game files into floppy images http://www.winimage.com/ and you're set. 😉

Reply 2 of 8, by john00001

Posted on 2013-10-29, 02:09

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Okay, thanks.

Reply 3 of 8, by rdflg

Posted on 2013-11-12, 15:29

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On the subject of the PC speaker, I attached a small microphone to the top of the PC speaker and fed the cable from it out of the PC and having soldered a 3.5mm jack plug on the end, plugged it into the MIC socket of my Sound Blaster sound card. This works EXTREMELY well but...only if Windows is running. Soooooo does anyone know how to adjust the MIC input level if running under MSDOS?

rdflg

Reply 4 of 8, by leileilol

Posted on 2013-11-12, 15:39

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mr_bigmouth_502 wrote:
If you're looking for something that better approximates the speed of a PC XT, I highly recommend this program.

That's really old (2006) and has strange design decisions... a Tseng ET4000 bios required for a XT?!

long live PCem

Reply 5 of 8, by Jorpho

Posted on 2013-11-12, 17:30

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rdflg wrote:
Soooooo does anyone know how to adjust the MIC input level if running under MSDOS?

The same way you adjust the regular volume: by using your soundcard's DOS-based mixer program.

Reply 6 of 8, by eL_PuSHeR

Posted on 2013-11-13, 08:26

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[Thread moved to DOSBox General Section]

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Reply 7 of 8, by rdflg

Posted on 2013-11-14, 15:52

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Thanks for the comments. Incidentally, using the mixer program that comes with Sound Blaster cards, namely SBMIXER.EXE, in DOS is no good, Jorpho, as it only allows one to adjust Synth, CD and Wave volumes i.e. only outputs but no inputs...

Reply 8 of 8, by mr_bigmouth_502

Posted on 2013-11-15, 04:50

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leileilol wrote:
mr_bigmouth_502 wrote:
If you're looking for something that better approximates the speed of a PC XT, I highly recommend this program.

That's really old (2006) and has strange design decisions... a Tseng ET4000 bios required for a XT?!

It's only required for VGA mode. 😉

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