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#112106 - 01/08/18 02:14 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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crazyc Offline
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It should show in the debug log window which instruction is failing. It should be trivial to fix assuming we've just missed a lockable instruction.

#112108 - 01/08/18 02:33 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Kale Offline
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Kale  Offline
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Naples, Italy
Here:

[Linked Image]

[Linked Image]

#112109 - 01/08/18 02:38 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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crazyc Offline
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Edit: yup address operand size prefix.

Last edited by crazyc; 01/08/18 02:41 PM.
#112110 - 01/08/18 03:30 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Kale Offline
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Kale  Offline
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Naples, Italy
It works smile

[Linked Image]

ETA: a side effect of this fix seems to be that Windows 95 no longer BSoDs at shutdown with 256+ colors. smile

Last edited by Kale; 01/08/18 05:14 PM.
#112540 - 02/08/18 08:22 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Offline
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Bavaria
Got another luggable, the Compaq Portable II

[Linked Image]

It's your basic 8 MHz 80286 affair with four ISA slots ... my machine unfortunately has been cannibalized for its drives, but originally they came with the usual mix of one or two floppy drives and / or a harddisk. In this case the standard floppy drive was 360K, the harddisk options being 10 or 20MB - MFM drives connected to an IDE card via an adapter.

The standard video card is a CGA/Hercules hybrid that is described well on John Elliott's site.

Here's where things get interesting though. My machine has the Compaq EGA instead of the default card, notable for its connector for the internal monitor of the Portable II.

[Linked Image]

This box came fully stacked - in addition to the standard compliment of cards, there is an Irwin tape streamer card and a PC/3278 terminal emulation board.

[Linked Image]

There's no company name on my card, but the IRMA cards look very similar: http://www.computinghistory.org.uk/det/40314/IRMA-PC-3278-Decision-Support-Interface/

The Portable II's BIOS ROMs slip right into the AT driver, and I'll issue a PR later, but I've also dumped the keyboard controller and the EGA BIOS which unfortunately doesn't work out of the box with our driver. I'll leave that stuff for people who know what they're doing smile

Files are on the FTP and here.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#112557 - 02/10/18 12:08 AM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Edstrom Offline
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I have just dumped the DOS 3.10 system disks for the Ericsson WS286, rfka01 helped me buying them at the German Ebay since they would not ship to here.

[Linked Image] [Linked Image]

Interestingly enough there was a maintenance disk included where all the special features of the machine can be tested. As the WS286 BIOS was just dumped and added to the at.cpp generic AT clone I was curious how "Ericsson compatible" the video modes are and here is the result:

[Linked Image] [Linked Image] [Linked Image] [Linked Image]

The 40x25 and 320x200 seems to miss some characters but the Ericsson name is printed just fine.... The hi res modes caused even more problems:

[Linked Image] [Linked Image] [Linked Image] [Linked Image]

Two modes looked just bananas but I could still get back to the menu and there was a lot of messages like "EGA: Read mode 1 not supported yet!" which probably explains why the Ericsson logo isn't filled. More problematic is that two of the other modes crashed so hard that I couldn't get back to the menu.

Are these standard video mode tests or Ericsson specific? I would like to see what they should look like but I guess I need to find a working WS286 and ask the owner to run the test suite for me.

Anyway I am happy that the dump was worth the money/effort and this will indeed help finding the fixes needed for the WS286.

#112562 - 02/10/18 07:09 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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incog Offline
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Bradford, UK
http://retro-net.de/assets/files/PC7486SLC-33.zip - Amstrad PC7486SLC-33 - BIOS-Dump

#112585 - 02/11/18 08:49 PM Re: PC/XT/AT (inside) WIP topic [Re: incog]  
Joined: Mar 2005
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incog Offline
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Bradford, UK


This is related to the Amstrad MegaPC's in MAME already. Cached as the page is gone.

The Amstrad MegaPC's came with an ISA card that is a Sega MegaDrive, right now the MAME drivers miss this out.

I donated 2 of these to museums, I still have the keyboard controllers from 2 Amstrad MegaPC and can send them for dumping.

Last edited by incog; 02/11/18 09:26 PM.
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