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#111830 - 12/23/17 07:16 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
Joined: Aug 2009
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Kale Offline
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Kale  Offline
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Naples, Italy
Some random pics of Win 95/98 games that got added to SW list so far:

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

TODO: try to make a Japanese Win 95/98 CHD disk.
Also fix the damn VGA bugs ...

#111831 - 12/23/17 08:18 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
Joined: May 2015
Posts: 35
mixmaster Online content
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mixmaster  Online Content
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Originally Posted by Kale
Also fix the damn VGA bugs ...

What emulated graphics card?

Last edited by mixmaster; 12/23/17 08:18 PM.
#111871 - 12/25/17 11:45 AM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
Joined: Feb 2012
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Tinu Offline
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Tinu  Offline
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Switzerland
I am playing with the ibm5170 driver. I created a standard type 3 hard disk (chdman createhd -o 30MB.hd -chs 615,6,17) and use it as harddisk1. Booting with the diagnostic diskette image allows me to set the hard disk to type 3. Diagnostics of the disk work fine with the exception of the "error correction" test: This one shows a "time out" error.

After rebooting with a DOS 3.3 diskette I can FDISK and FORMAT the hard disk. I can also create a directory DOS and copy the contents of the floppy to this directory. I can successfully "type" (i.e. read back) the autoexec.bat file.

Apart from this, the disk does not work: When I execute BASICA I get a read error, CHKDSK shows multiple errors and then tells me the disk is not ready, and the disk is not bootable.

The default slot allocation looks suspicious: "IDE Fixed Drive Adapter". Didn't the 5170 still use an MFM controller, just like the IBM5160? And didn't the controller card do both floppies and hard disks? On the other hand: When I switch to the "hdc" controller, I get a "1782-Disk Controller Failure" from BIOS.

All in all I am a bit confused. Maybe the ibm5170 is just not ready to be played with wink Thanks for any insight or additional information.

#111872 - 12/25/17 12:33 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Bavarese Offline
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Germany
I had to use "-c none" to get a writeable hard disk, so i'd recommend

createhd -c none -chs 615,6,17 -ss 512 -o 30MB.hd

#111873 - 12/25/17 12:46 PM Re: PC/XT/AT (inside) WIP topic [Re: Bavarese]  
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Tinu Offline
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Switzerland
Originally Posted by Bavarese
I had to use "-c none" to get a writeable hard disk

Thanks for your recommendation. The defaults are already for 512 byte sectors and no compression, so unfortunately this does not change the result.
The generated disk as such is fine. When I use it with another driver (e.g. atvga, or ibm5160) it works as expected.

#111875 - 12/25/17 05:36 PM Re: PC/XT/AT (inside) WIP topic [Re: Tinu]  
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crazyc Offline
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Originally Posted by Tinu
IDidn't the 5170 still use an MFM controller, just like the IBM5160?
Yes, but not like the 5160. The AT HDD controller is the ancestor of IDE and the earliest IDE drives are 100% compatible. There is some bug in our emulation that is causing the problem.

#111879 - 12/26/17 12:40 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Online content
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rfka01  Online Content
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Bavaria
A few weeks ago I tried to talk a guy through dumping the ROM of his COMPAQ Portable 386 from inside DOS over email. The resulting file must have been corrupted by a banking scheme as the driver complained about a "ROM error".

[Linked Image]

I the meantime I got a Portable 386 by myself, and I dumped the ROMs by reading them out directly, but simply plugging them into the at386 driver doesn't work - the RAM is counted until 128K or 192K, and then a "Memory error" is shown.

[Linked Image]

My machine comes with the regular 2MB RAM on board and a 4MB expansion, counting up to 6144KB during the POST.

Interestingly enough, the machine has been modded to accept a 210MB harddisk as "Type 1", and this is reflected on the handwritten ROM labels. This Portable 386 has a Seagate 1239A drive installed that is chock-full with a boot manager (Bootcon) and company software in DOS and Windows 3.1 flavours. Exiting Windows or the DOS file manager forces a shutdown.

Here and on the FTP are the ROMs, docs, DOS distributions and a bootdisk made on the Portable 386 as well as photos

After some coaxing I managed to dump the harddisk on a Linux machine via dd, but after converting the image to CHD, I can see the contents, but the image doesn't boot (I used ct486 to autodetect the harddisk parameters).

[Linked Image]

Could someone please find out the C-H-S parameters for the modified Type 1 210MB harddisk from the Portable 386 BIOS, so I can try to image the harddisk again with those parameters? Is there another trick to get a bootable disk image using dd (I used "sudo dd if=/dev/sda of=filename"; sda was determined by "sudo fdisk -l" first).

While I won't be able to release the hard disk image (the company this machine belonged to still exists), I'd like to preserve the unique setup.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#111882 - 12/26/17 02:28 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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crazyc Offline
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Look at the mbr and use the geometry shown there. That drive only supports a limited number of geometry translations.

#111885 - 12/26/17 05:13 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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rfka01 Online content
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rfka01  Online Content
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Bavaria
I read 8 heads, 45 sectors/track, 813 cylinders in the MBR posted below.
Is that correct? (Sorry, doing that for the first time smile )
There appears to be a discrepancy in the LBA value of the partition entry - is that even used in an early drive like this?

Code
FA 33 C0 8E D0 BC 00 7C 8B F4 50 07 50 1F FB FC
BF 00 06 B9 00 01 F2 A5 EA 1D 06 00 00 BE BE 07
B3 04 80 3C 80 74 0E 80 3C 00 75 1C 83 C6 10 FE
CB 75 EF CD 18 8B 14 8B 4C 02 8B EE 83 C6 10 FE
CB 74 1A 80 3C 00 74 F4 BE 8B 06 AC 3C 00 74 0B 
56 BB 07 00 B4 0E CD 10 5E EB F0 EB FE BF 05 00 
BB 00 7C B8 01 02 57 CD 13 5F 73 0C 33 C0 CD 13 
4F 75 ED BE A8 06 EB D3 BE CE 06 BF FE 7D 81 3D 
55 AA 75 C7 8B F5 EA 00 7C 00 00 55 6E 67 81 6C 
74 69 67 65 20 50 61 72 74 69 74 69 6F 6E 73 2D 
54 61 62 65 6C 6C 65 00 46 65 68 6C 65 72 20 62 
65 69 6D 20 4C 61 64 65 6E 20 64 65 73 20 42 65 
74 72 69 65 62 73 73 79 73 74 65 6D 73 00 42 65 
74 72 69 65 62 73 73 79 73 74 65 6D 20 6E 69 63 
68 74 20 76 6F 72 68 61 6E 64 65 6E 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 01 
01 00 06 08 ED F7 2D 00 00 00 2B 47 06 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 AA


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
#111886 - 12/26/17 05:29 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
Joined: Jan 2012
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crazyc Offline
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Looks like 1015,8,45 to me. That's an odd translation becuase it gives only 187MB on a 211MB drive.

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