IBM PS/1 Audio Card.

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Re: IBM PS/1 Audio Card.

Postby Great Hierophant » 2018-12-22 @ 19:47

matze79 wrote:Is there any Documentation how the DAC works ? :)

Ahh i see..
Code: Select all
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/ ... index.html
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Re: IBM PS/1 Audio Card.

Postby DaveJustDave » 2019-1-03 @ 05:21

Does anyone have the sierra patch utility for this card to enable support on SCI games? I would love a copy
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Re: IBM PS/1 Audio Card.

Postby Cloudschatze » 2019-1-03 @ 05:33

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
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