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#110192 - 07/06/17 02:07 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Offline
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Got a NOS NCR graphics card - I used to have one of these and the matching external monitor and I remember its sharpness and solid, vivid colours. Should have never sold it ...

[Linked Image]

It's certified with the NCR PC4i's built in monitor, so it would be nice to have to round off the PC4i's emulation. It can do CGA plus a special eight colour mode.

https://mega.nz/#!PRZXjD5D!ObEbsuPIvZqQEKtAif1xV1ojmWP9dxE_JHmBaGlYDn4


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#110194 - 07/06/17 02:47 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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R. Belmont Online content
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Nice, that looks pristine!

#110195 - 07/06/17 03:01 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Offline
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Yup, it was still sealed :P


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#110220 - 07/07/17 11:23 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Offline
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PR #2450 ... added Commodore PC BIOS and the original PC 10 / 20 / 30 machines.

The files are from this thread:

http://forum.classic-computing.de/index.php?page=Thread&threadID=9978

The PC 10 et al. show a boot screen, but with a timer error, and I can't continue from there.

[Linked Image]


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#110221 - 07/07/17 11:53 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Carl can probably make short work of the timer error. And it's kinda funny seeing "Commodore BIOS".

#110238 - 07/09/17 09:59 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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crazyc Offline
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[Linked Image]
Still a timer error but it boots.

#110239 - 07/09/17 10:19 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Offline
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Great! Thanks for tackling this smile


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#110276 - 07/13/17 04:47 AM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Luigi30 Offline
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Tried to install OpenStep 4.2 on at486. The installer never comes up, the kernel panics because the CD-ROM drive (which contains the install CD) never reads as ready. Anyone gotten this to work? Maybe I need to specify a different driver?

[Linked Image]

#110278 - 07/13/17 12:17 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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No, that's almost certainly a problem with our ATA(PI) emulation. We've only successfully installed OpenStep on "black hardware" in MAME, and even that's regressed.

#110591 - 08/13/17 10:14 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Offline
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I got several different ROM versions for the Schneider Euro PC, had the one from my Euro PC II lying around and got one from a Euro XT as well. They're up on the FTP now as well.

https://mega.nz/#!mApDXBib!fBEapceyK91ml-k8UUDn5ZaHLWY-38N1INxKyRzk7YI

The lowest rev. we now have is 2.05, a 2.04 is also known, but not included. 2.05 does not work now, and I have commented it out in my commit. Versions from 2.06 have a change in memory management, and work well.

I have added comments with information about the systems to the driver and changed the available memory to what the machine actually offers.

This site has pictures of a Euro XT mainboard and system:

http://ru.pc-history.com/schneider-euro-xt-51-449.html

When researching the machines' specs, I found the following issues with our driver:

* An external 20MB harddisk (Schneider HD20) can be added to the PC and PC II. This is a XT IDE drive. The BIOSs contain their own copy of the WD XT IDE BIOS that can be activated from the BIOS setup menu. The HD BIOS is at F000:A000.
* AGA is not quite the correct choice for the standard graphics adapter, as the Schneiders are only capable of switching between Hercules and CGA modes.
* The standard graphics option for the Schneiders is their internal video circuit. Due to our slot system, external video has to be selected in the BIOS setup.
* The PC 2 and XT have 768K of memory that can be configured from the BIOS setup as 640K, 640K+128K EMS and 512K+256K EMS. The EMS options are not visible in our emulation and loading the EMS driver fails. See http://forum.classic-computing.de/index.php?page=Thread&threadID=8380 for screenshots.

The above archive contains two disk images. The *.TD0 is an unchanged disk image from a Schneider MS-DOS 3.3 disk. The *.IMA version has the EMS driver activated, but this fails to load.

Last edited by rfka01; 08/13/17 10:17 PM.

NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
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