added a blog on the Unisys CWD-4002

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+title = "Retro Computing - Unisys"
+categories = [ "Retro Computing", "Unisys" ]
+date = "2018-02-10T13:55:47+02:00"
+thumbnail = "/images/blog/retro-computing-unisys/unisys-CDW-4002-1.jpg"
+
++++
+
+## Intro
+
+I saw a video on [LGR](https://www.youtube.com/watch?v=ddgmzmw6_qE) and
+thought, this is a nice system to run my own operating system on.
+
+It came as a i486 DX/2, 66 MHz, 16 MB RAM and a 512 MB hard drive. sweet.
+And fits under my monitor, together with a Aten KVM switch and an Alix 1.E
+minicomputer:
+
+{{< figure src="/images/blog/retro-computing-unisys/unisys-CDW-4002-backside.jpg" title="Backside view" >}}
+
+Ok, I increased the memory to a wooping 32 MB. And I bought an 
+IDE/SD-adapter as the 512 MB hard disk is not enough for a basic installation
+of Archlinux32 and I don't know how long the hard disk would work anyway.
+And old hard disks are really noisy.
+
+It contains an 8 GB SD card, I'm still wondering how many GBs the BIOS can
+swallow. At least the boot from within the first 2 GB with LBA adressing
+seems to work:
+
+{{< figure src="/images/blog/retro-computing-unisys/unisys-CDW-4002-sd-ide.jpg" title="SD card in a SD/IDE-adapter" >}}
+
+The motherboard is a "486-DBA", First International Computer. It's quite
+a neat design enough room to add an IDE raiser for one small ISA card:
+
+{{< figure src="/images/blog/retro-computing-unisys/unisys-CDW-4002-inside.jpg" title="Inside the CDW-4002" >}}
+
+On the back size there is a paper attached which tells about all
+the jumpers you can play with:
+ 
+{{< figure src="/images/blog/retro-computing-unisys/unisys-CDW-4002-schematics.jpg" title="Schematics of the board" >}}
+
+There is a built-in network card (NE2000 compatible, an Accton/UNISYS UK0022).
+
+The graphic card is a Cirrus Logic GD5424 which is pretty standard.
+
+I had to put in a sound card, the box has a quite unique ISA-riser design
+and due to it's size you have to use a later model of an ISA 16-bit 
+sound blaster which is small enough to fit. I went with a 
+Creative Sound Blaster Vibra 16XV CT4170:
+
+{{< figure src="/images/blog/retro-computing-unisys/unisys-CDW-4002-soundcard.jpg" title="ISA 16-bit sound card, CT4710" >}}
+
+Instead of repeating all information I found, I have made a list of
+interesting videos, globs, articles, forums and download locations.
+You find them at the bottom of the article.
+
+## DOS 6.22 and Window 3.11
+
+First of all you have to bootstrap the machine somehow. I decided to
+go via DOS 6.22 und first install the 3 standard disks (after doing
+a fdisk setup with [BasicLinux](http://distro.ibiblio.org/baslinux/)).
+BL has the advantage of being able to boot from two 1.44 MB floppies.
+
+Then I had to install the NE2000 drivers for the Accton/UNISYS UK0022
+integrated network card. The network driver is started by giving it
+the I/O-address and the IRQ number:
+
+```
+C:\NET\NE2000.COM 0x60 10 
+```
+
+You can then use FreeDOS' wget port to fetch the rest of the software
+to install via network to avoid a cramp while swapping floppies.
+
+## Windows 3.11
+
+The installation is pretty standard, just remember to install the
+TCP/IP-Stack to get network connectivity.
+
+For the sound card install the CTCU and CTCM programs (ISA plug-
+and-play for auto-configuration ant utility).
+
+## Native Oberon
+
+This installation deserves it's own blog article. Just very short:
+
+Using the latest Native Oberon version from the ETH, install from
+the OBERON0.DSK floppy. 
+
+Have the additional files ready on the C:\ drive
+
+There is an excellent blog about how to use Oberon on Vintage Computers,
+check out the [Oberon Tutorial](https://www.youtube.com/watch?v=Do2O1yFrnos)
+series on Youtube by Andres Ramos.
+
+## Future plans
+
+I want to be able to boot a modern Linux kernel and distribution on
+it. Currently I'm working on a "port" of [Archlinux32](http://www.archlinux32.org)
+to the i486 architecture using the [crosstool-n](https://crosstool-ng.github.io/)
+toolchain.
+
+The installation process has to be something over iPXE, as a 1.44MB floppy
+really doesn't hold a kernel 4.15.x anymore. iPXE itself will need some
+patching for i486 too.
+
+## Videos and Links
+
+* LGR: [My Smallest 486 Desktop PC: Unisys CWD-4002](https://www.youtube.com/watch?v=ddgmzmw6_qE)
+* HighTreason610: [Leo Data Book 486-DBA Overview (Very small computer)](https://www.youtube.com/watch?v=ZTuJXf0if2A)
+* Anres Ramos: [Oberon Tutorial](https://www.youtube.com/watch?v=Do2O1yFrnos)
+
+### Blogs and articles
+
+* [Gered's Ramblings, Follow-up: Unisys CWD 4001](http://blarg.ca/follow-up-unisys-cwd-4001/)
+* [Unisys CWD Surplus info Page](http://mule.sworks.com/keng/unisys.shtml)
+* https://www.vogons.org/viewtopic.php?f=25&t=55212: post in the Vogons.org by some CWD 4001 users
+* [8 bit museum](http://museo8bits.com/wiki/index.php/Unisys_CDW5001): Though it's about the Pentium based succeesor, it's worth a look
+* [French blog](http://www.win3x.org/win3board/viewtopic.php?t=20276)
+* [Windows 3.11 software installation](http://stephan.win31.de/w31mm_d1.htm): in German
+
+### Hardware
+
+* SD to IDE adapter on [Ebay](http://www.ebay.com/itm/291873933509)
+* [Soundblaster VIBRA 16, CT4170](http://www.amoretro.de/2012/09/creative-sound-blaster-16-waveffects-ct4170.html):
+  in German
+* [French page with drivers](http://nwserveur.no-ip.org/win3xorg/devices/UNISYS%20CWD/Model%204001/Drivers/)
+
+### DOS drivers
+
+* http://www.brutman.com/mTCP/: TCP/IP software for DOS
+* [DOS drivers for the NE2000](http://www.georgpotthast.de/sioux/packet.htm), the NE2000.EXE package driver
+* [Vibra 16 Soundblaster drivers on Vogons.org](http://www.vogonsdrivers.com/getfile.php?fileid=33&menustate=0)
+
+### Windows 3.1 drivers
+
+* [Cirrus Logic GD5424](http://www.vogonsdrivers.com/index.php?catid=47)
+
+### Windows 3.1 software
+
+* [Windows 3.1x Utilities](http://www.k7tty.com/Utilities/Windows31/): some
+  packages with useful Windows 3.1x software bundled
+* [FTP client](https://www.systemhaus-brandenburg.de/download/tools/win3x/ftp/ftp.html):
+  as the windows TCP/IP-32 stack for Windows 3.11 provides only quite an
+  ugly text based FTP client.
+* [Netscape 3.04](http://ftp.vim.org/netscape/communicator/english/3.04/windows/windows3.1/navigator_gold/)
+
+### Games:
+
+* [DOS Games](http://www.abandonwaredos.com)
+
+
+Windows 3.1 software:
+
+
+
+
+
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