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Re: PC/XT/AT (inside) WIP topic [Re: Kale] #108461
01/15/17 02:23 PM
01/15/17 02:23 PM
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Stiletto Offline
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I emailed Nick once, a long time ago now...

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #108734
02/05/17 09:21 PM
02/05/17 09:21 PM
Joined: Jan 2012
Posts: 923
Bavaria
rfka01 Offline
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Bavaria
I have an ISA soundcard with an OPL4 to give away for free (taker only pays shipping)

http://www.mirosupport.de/sound/pcm10/pcm10.html

if someone wants to take a stab at emulating it.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #108737
02/06/17 02:55 AM
02/06/17 02:55 AM
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R. Belmont Offline
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The YRW-801M instrument ROM is already dumped. Could you peel off the "MIRO" sticker on the chip at U12 and see what the markings are? (It'll likely be a micro controller of some sort).

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #108738
02/06/17 06:55 AM
02/06/17 06:55 AM
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Bavaria
rfka01 Offline
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Ta-daa:


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #108739
02/06/17 01:12 PM
02/06/17 01:12 PM
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R. Belmont Offline
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Ahh, ok. So yeah, there's likely nothing to dump from that outside of the instrument ROM. The 82c929 is an HLE SB16 + CD-ROM interface (a data sheet with register programming info is available), the AD1848 is the DAC for the SB16 audio, and the OPL4 handles the rest. So we don't need the card itself for emulation, just the drivers and whatever other software came with it.

Re: PC/XT/AT (inside) WIP topic [Re: Kale] #108740
02/06/17 02:03 PM
02/06/17 02:03 PM
Joined: Jan 2012
Posts: 923
Bavaria
rfka01 Offline
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Posts: 923
Bavaria
Drivers and manuals are on the site I linked to:

http://www.mirosupport.de/sound/pcm10/pcm10.html

They also carry files for the PCM12 that has a built in MIDI port and can support a wavetable extension

http://www.mirosupport.de/sound/pcm12/pcm12.html

In a later incarnation it was PnP compatible

http://www.mirosupport.de/sound/pcm12/pcm12pnp.html


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #109159
03/15/17 06:57 PM
03/15/17 06:57 PM
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Posts: 783
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crazyc Offline
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Re: PC/XT/AT (inside) WIP topic [Re: Kale] #109160
03/15/17 08:25 PM
03/15/17 08:25 PM
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R. Belmont Offline
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One of the most famous demoscene Easter Eggs. Great soundtrack on the demo itself too.

Re: PC/XT/AT (inside) WIP topic [Re: crazyc] #109447
04/27/17 05:10 AM
04/27/17 05:10 AM
Joined: May 2005
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Luigi30 Offline
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Tried to install OS/2 Warp 4 in at486 on a lark - the installation claimed to complete but after the "thanks for installing!" screen I got a big red error screen that said the installer couldn't get the installed hard drive letter. I'll see if I can figure out what's going on with it.

If you really want some funky PC hardware, I've got a Commodore A2286AT bridgeboard installed in my Amiga. It's a whole 286 PC on an Amiga Zorro card. I'm not sure how it would fit into everything (it's totally independent from the Amiga, communicating through dual-port RAM and some special BIOS functions, I have the developer manual) but I was able to locate dumps of all the onboard ROMs online. It doesn't boot just putting the BIOS into at.cpp but I didn't expect it to.

Last edited by Luigi30; 04/27/17 06:12 AM.
Re: PC/XT/AT (inside) WIP topic [Re: Kale] #109468
04/28/17 05:24 AM
04/28/17 05:24 AM
Joined: Apr 2012
Posts: 180
Germany
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Bavarese Offline
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Germany
OS/2: there is a 1024 cylinder limit, which means you cannot work with hard disks beyond 504 MB.

1024 cylinders, 16 heads and 63 sectors.

See thread

Last edited by Bavarese; 04/28/17 05:44 AM.
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