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IBM PS/1 Audio Card.

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Reply 80 of 91, by Great Hierophant

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matze79 wrote:
Is there any Documentation how the DAC works ? :) […]
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Is there any Documentation how the DAC works ? 😀

Ahh i see..

These two activate the IBM PS/1 Audio Card. It is always situated at ports 0200, 0202-0204, so there's no need for a "base" value. 

is it dma driven ? or more like a covox device ?

It's an in-between, think of it like a more capable Disney Sound Source. it uses a 2K FIFO buffer for the DAC and can send an interrupt when the buffer is almost empty. The rate in which the FIFO is sent to the DAC is controlled by an 8-bit timer. The Options from the Technical Reference will tell you how it works : ftp://ftp.mindcandydvd.com/pub/drivers/IBM/PS … 2011/index.html

http://nerdlypleasures.blogspot.com/ - Nerdly Pleasures - My Retro Gaming, Computing & Tech Blog

Reply 81 of 91, by DaveJustDave

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Does anyone have the sierra patch utility for this card to enable support on SCI games? I would love a copy

I have no clue what I'm doing! If you want to watch me fumble through all my retro projects, you can watch here: https://www.youtube.com/user/MrDavejustdave

Reply 82 of 91, by Cloudschatze

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DaveJustDave wrote:

Does anyone have the sierra patch utility for this card to enable support on SCI games? I would love a copy

ftp://ftp.oldskool.org/pub/IBM_PC_BBS/ps1/instdrv.exe

Reply 83 of 91, by matze79

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I have a PS/1 with PS/1 Audio Card now and test some Stuff.

Is there anyway to access MIDI Devices from DOS ?
i only get it working on Windows 3.x.

https://www.retrokits.de - blog, retro projects, hdd clicker, diy soundcards etc
https://www.retroianer.de - german retro computer board

Reply 84 of 91, by Great Hierophant

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matze79 wrote:

I have a PS/1 with PS/1 Audio Card now and test some Stuff.

Is there anyway to access MIDI Devices from DOS ?
i only get it working on Windows 3.x.

Are you trying to play a SMF via the PSG on the PS/1 Audio Card or are you trying to access the MIDI ports to send SMF data to a MIDI module? The former requires a driver to translate MIDI commands to the PSG, the latter is unlikely to work unless the program supports PS/1 MIDI, which is not MPU-401 compatible.

http://nerdlypleasures.blogspot.com/ - Nerdly Pleasures - My Retro Gaming, Computing & Tech Blog

Reply 85 of 91, by matze79

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I`m trying to get a General MIDI Module to work, but PSG MIDI is also intressenting 😀

https://www.retrokits.de - blog, retro projects, hdd clicker, diy soundcards etc
https://www.retroianer.de - german retro computer board

Reply 86 of 91, by Myloch

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Myloch wrote:

if someone can test a dos game with real ps1 card hardware, please contact me privately.

Here is a video explaining the bug I previously found in kq5 it-fr-ge-sp floppy releases (000.000.148/9 or similar).
When dealing with dosbox-x ps1 emulation, this happens when getting objects: fuckin ugly garbled sound, see the video here. Game bug or ps1 emulation flaw? This is why a check with real hardware is essential.

Matze79 kindly tested this game on real hardware and it seems to work correctly, maybe something is wrong with emulation accuracy.

"Gamer & collector for passion, I firmly believe in the preservation and the diffusion of old/rare software, against all personal egoisms"

Reply 87 of 91, by matze79

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Yeah it works on Real Hardware, but kq5 is hard to play on a 10Mhz 286.
I can make a small video when i have some time.

Also got Windows 3.x up with Sound.
But still did not get MIDI working with the Breakout Box.

https://www.retrokits.de - blog, retro projects, hdd clicker, diy soundcards etc
https://www.retroianer.de - german retro computer board

Reply 88 of 91, by Myloch

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matze79 wrote on 2019-04-08, 05:19:

Yeah it works on Real Hardware, but kq5 is hard to play on a 10Mhz 286.
I can make a small video when i have some time.

...Still waiting 😀 Please, video(s) can be useful for bugfixing.

Any good programmer who wants to try fixing long time dead ps/1 audiocard emulation in Dosbox-X?
Jmk account is banned for some reason so the original creator of the patch is gone.

For now we ps/1 fans are stuck with ancient ykhwong builds. 🙁

"Gamer & collector for passion, I firmly believe in the preservation and the diffusion of old/rare software, against all personal egoisms"

Reply 89 of 91, by Jo22

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Myloch wrote on 2023-04-13, 00:11:

For now we ps/1 fans are stuck with ancient ykhwong builds. 🙁

Um, is this a bad thing ? I'm still using ykhwong's SVN build 07-05-2011 here.
Simply because its the least broken, least bloated DOSBox I've seen in the past years.
The current versions that I've tried have massive stability issues with Windows 3.1x, for example.
(I'm also using official DOSBox and DOSBox-X on my Raspberry Pi 4, they're kind of okay.)

"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

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Reply 90 of 91, by matze79

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Oh Sorry, i had to give the card back
i just borrowed it for some time to make some investigations and maybe make some efforts to add ps/1 function to tandy card.
But i`m limited in time, so i did not so much retro progress.. 🙁

https://www.retrokits.de - blog, retro projects, hdd clicker, diy soundcards etc
https://www.retroianer.de - german retro computer board