Windows NT 3.5

Windows NT 3.5A version of the Windows NT operating system

Screenshot of Windows NT 3.5

Developer| Microsoft
Source model| Closed source
Released to
manufacturing| September 21, 1994; 31 years ago (1994-09-21)[1]
|Final release|Latest release}}| Service Pack 3 (3.5.807) / June 21, 1995; 30 years ago (1995-06-21)[1]
Marketing target| Business and Server
Platforms| IA-32, Alpha, MIPS, PowerPC[2]
Kernel type| Hybrid
Userland| Windows API, NTVDM, OS/2 1.x, POSIX.1
License| Commercial proprietary software
Preceded by| Windows NT 3.1 (1993)
Succeeded by| Windows NT 3.51 (1995)
Support status
Support ended on December 31, 2001

Windows NT 3.5 is the second major release of the Windows NT operating system developed by Microsoft, targeting the data server and personal workstation markets.[3] It was released on September 21, 1994, as the successor to Windows NT 3.1. One of the primary goals during its development was to improve the operating system's performance. As a result, the project was codenamed "Daytona", after the Daytona International Speedway in Daytona Beach, Florida.[4] Windows NT 3.5 was succeeded by Windows NT 3.51, released in 1995.[5] Support and updates for Windows NT 3.5 was ended by Microsoft on December 31, 2001.

## Contents

* 1 Features
* 2 Limitations
* 3 Reception
* 4 Support lifecycle
* 5 Source code
* 6 References
* 7 External links

## Features

Windows NT 3.5 comes in two editions: NT Workstation and NT Server. They respectively replace the NT and NT Advanced Server editions of Windows NT 3.1.[6] The Workstation edition allows only 10 concurrent clients to access the file server and does not support Mac clients.[7]

Windows NT 3.5 includes integrated Winsock and proper TCP/IP support,[8] replacing the incomplete implementation of TCP/IP based on the AT&T UNIX System V "STREAMS" API found in Windows NT 3.1. TCP/IP and IPX/SPX stacks in Windows NT 3.5 are rewritten.[9] NetBIOS over TCP/IP (NetBT) support as a compatibility layer for TCP/IP was introduced as also the Microsoft DHCP and WINS clients and DHCP and WINS servers.[10][11]

Windows NT 3.5 can share files via the File Transfer Protocol, and printers through the Line Printer Daemon protocol. It can act as a Gopher, HTTP, or WAIS server,[12] and includes Remote Access Service for remote dial-up modem access to LAN services using either SLIP or PPP protocols.[13] The Resource Kit includes the first implementation of Microsoft DNS.[14]

Other new features in Windows NT 3.5 include support for the VFAT file system, allowing for long file names in FAT16 partitions, Object Linking and Embedding (OLE) version 2.0 and support for input/output completion ports.[15] Microsoft updated the graphical user interface to be more consistent with that of Windows for Workgroups 3.11. NT 3.5 shows performance improvements over NT 3.1, and requires less memory.[5]

Windows NT 3.5 added support for ATAPI CD-ROM. Windows NT 3.5 also allegedly has support for ISA PnP but it is not enabled by default.

## Limitations

A lack of drivers for PCMCIA cards limited NT 3.5's suitability for notebook computers.[12]

To install Windows NT 3.5 on a computer that has a sixth-generation or later x86 processor,[16] one has to modify files on the installation files.[5]

## Reception

In July 1995, Windows NT 3.5 with Service Pack 3 was rated by the National Security Agency as complying with Trusted Computer System Evaluation Criteria (TCSEC) C2 criteria.[17]

## Support lifecycle

Template:Timeline Windows NT 3.x

## Source code

In May 2020, the full source code for the second release candidate build (build 782.1) of Windows NT 3.5, along with source code for the original Xbox, leaked onto the Internet.[18]

## References

1. ↑ 1.0 1.1 Adams, Paul (4 August 2009). "Windows NT History". Microsoft. https://blogs.technet.microsoft.com/mrsnrub/2009/08/04/windows-nt-history/.
2. ↑ "Windows NT 3.5 for PowerPC". November 9, 1994. https://archive.org/details/NT3.5PPC.
3. ↑ Aftab Nazir Ahmed. Geographic Information System for Capital Development Authority (PDF) (Thesis). Quaid-I-Azam University. p. 46.
4. ↑ Russinovich, Mark; Solomon, David A. (8 December 2004). Microsoft Windows Internals (4 ed.). Microsoft. ISBN 978-0-7356-1917-3. https://archive.org/details/isbn_9780735619173. "The first release of Windows NT was larger and slower than expected, so the next major push was a project called "Daytona", named after the speedway in Florida. The main goals for this release were to reduce the size of the system, increase the speed of the system, and, of course, to make it more reliable."
5. ↑ 5.0 5.1 5.2 "Microsoft Windows NT 3.5". http://www.oldcomputermuseum.com/os/windows_nt3.5.html.
6. ↑ "Microsoft Windows NT 3.5". http://www.oldcomputermuseum.com/os/windows_nt3.5.html.
7. ↑ "Microsoft Windows NT 3.5 Server". http://www.oldcomputermuseum.com/os/windows_nt3.5ser.html.
8. ↑ "TCP/IP in Windows NT 3.5". Yale University. 9 April 1995. http://www.yale.edu/pclt/WINWORLD/NT.HTM.
9. ↑ "How to Optimize Windows NT to Run Over Slow WAN Links w/TCP/IP". http://support.microsoft.com/kb/140552.
10. ↑ "TCP/IP in Windows NT 3.5". Yale University. 9 April 1995. http://www.yale.edu/pclt/WINWORLD/NT.HTM.
11. ↑ "DHCP (Dynamic Host Configuration Protocol) Basics". http://support.microsoft.com/kb/169289.
12. ↑ 12.0 12.1 "TCP/IP in Windows NT 3.5". Yale University. 9 April 1995. http://www.yale.edu/pclt/WINWORLD/NT.HTM.
13. ↑ "Files Needed to Set Up Windows NT 3.5 and 3.51 RAS". 1 November 2006. http://support.microsoft.com/kb/142909.
14. ↑ DNSSETUP.EXE for Beta DNS Service included in ftp://ftp.microsoft.com/bussys/winnt/winnt-public/reskit/nt35/i386/i386.exe
15. ↑ Russinovich, Mark (1 November 2006). "Inside I/O Completion Ports". Microsoft. http://www.microsoft.com/technet/sysinternals/information/IoCompletionPorts.mspx.
16. ↑ "Windows NT 3.5 Setup and the Pentium Pro Processor". Microsoft. 1 November 2006. http://support.microsoft.com/kb/151212/en-us.
17. ↑ "Windows NT Server 4.0 – Maintain – Revision 1.1". Microsoft. 1998. https://technet.microsoft.com/en-us/library/cc767093.aspx.
18. ↑ "Xbox and Windows NT 3.5 source code leaks online". May 21, 2020. https://www.theverge.com/2020/5/21/21265995/xbox-source-code-leak-original-console-windows-3-5.

## External links

* Guidebook: Windows NT 3.51 Gallery – A website dedicated to preserving and showcasing Graphical User Interfaces

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