Category Archives: NT

Bad NTAS ISO

This might save someone a bit of head scratching… Several times, I tried to install Windows NT Advanced Server (NT 3.1 server) straight from CD-ROM (well, ISO) into a clean VM. The installation failed every time, asking for a nonexistent … Continue reading

Posted in Debugging, NT | 27 Comments

More CPUs in NT 3.x Workstation

The default processor limits of Windows NT 3.x are surprisingly difficult to establish. Quite possibly because although SMP was a big selling point of NT, in reality only a tiny fraction of PCs in the mid-1990s supported SMP, and of those, … Continue reading

Posted in NT, Software Hacks | 1 Comment

Windows NT 3.1 (and OS/2) Memory Detection

It is common knowledge that Windows NT 3.1 only recognizes up to 64 MB RAM, unlike NT 3.5 and later versions. This statement can be found in various places, including this blog. The limitation was empirically determined by installing NT … Continue reading

Posted in BIOS, NT | 35 Comments

NT 3.1 SMP

Generic x86 multiprocessing, Summer 1994 edition. There’s not much to say: Yep, that’s NT 3.1 running in a VM, and it sees two processors. Remember, you saw it here first!

Posted in Intel, NT, SMP | 61 Comments

Book Review: Inside Windows NT

A Few Decades Late Book Reviews Inside Windows NT, by Helen Custer Microsoft Press, 1992; 385 pages, ISBN 1-55615-481-X; $24.95 Inside Windows NT was one of the earliest published books about Windows NT, predating the actual July 1993 release of Windows NT … Continue reading

Posted in Books, NT | 5 Comments

Windows 8.1 Startup Bugcheck 0xC4

On some systems, both physical and virtual, 64-bit Windows 8.1 as well as Server 2012 R2 consistently crashes with error code (bug check) 0xC4; 64-bit Windows 8 may run on these same systems without trouble. On physical systems, the BSOD … Continue reading

Posted in Bugs, Microsoft, NT, VirtualBox | 9 Comments

NT Video Miniport for VirtualBox, With Source Code

Upon reader request, the OS/2 Museum is publishing the source code to the NT video miniport driver for VirtualBox. To recap, this is a NT video miniport which allows 32-bit NT versions to use high-resolution graphics modes in a VirtualBox VM. The … Continue reading

Posted in Graphics, NT, Source code, VirtualBox | 4 Comments

Installing Oct ’91 NT from CD

With VirtualBox 4.3, it is possible to install the oldest known pre-release of Windows NT directly from CD, the way Microsoft intended. This is the Fall ’91 Comdex preview which only supported the x86 architecture and a very short list … Continue reading

Posted in Microsoft, NT, SCSI | 14 Comments

Twenty Years Ago Today…

On July 24th 1993, Microsoft finalized the first release of Windows NT, labeled version 3.1 “to avoid confusion”. This was a big day for Microsoft, although the practical impact on the computer industry was not particularly big, at least not … Continue reading

Posted in Microsoft, NT | 6 Comments

Windows NT BSOD Aclock Port

Do you remember the famous Windows NT Blue Screen Of Death? For years it was a source of jokes and bad reputation of Windows reliability. There even was a Blue Screen Saver! Today we fortunately see much less of it, but it … Continue reading

Posted in 386, Development, NT, VGA, Windows, x86 | 10 Comments