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I was wondering if anyone recognize which company made the Audio/Video/Power connector of the Luxor ABC80. See the images for details.

As posted in the DEC forum, I am archiving a pack of 8" floppy disks I came over. While most of those disks are for the PDP-11, one of the disks seems to be a release of FDOS-III for the Poly88. Does anyone here have experience with this? I don't know enough about this system to say if this...

About a month ago I completed a documented firmware-disassembly of a few versions of the Tandberg Data TDV-5010 keyboard firmware. The TDV-5010 is best known as a 122-key PS/2 keyboard from Tandberg, made from 1989 and until the mid 1990s. These were in particular made for some of their...

Hi I am waiting for some 8" floppies with some RT-11 software on them. There's Fortran and BASIC, and the expected pile of games. Several of the floppies also seems to have a system installed, so I guess these are bootable. Now, I don't own and I have not used any PDP-11 type machine before...

I recently got hold of this little thing, but I can't find any mention of a "8087-11" anywhere on the internet. Does anyone know any more details on what specs this might operate with? The module itself is for adding an 8087 to a machine with just one socket for a 8086. Unfortunately the 8087...

I've been looking at some disk images containing the Tandberg TOS operating system, and I was curious about how much of their choices they came up with from scratch and how much is re-used from other products. This OS was made and used with the TDV-2114 8080-based computer in the late half of...

I'm putting this out here just in case. Getting technical information on these old digitizers seems to be quite hard as these were never plentiful in the consumer market. In any way, lately I have been working on figuring out the settings to a digitizer board I have of the type Numonics 2210...

I am going through and once and for all properly archiving my collection of floppy disks, and from time to other I come across 48tpi disks with a peculiar 128-byte FM-modulated tag on head 0 of the 41st cylinder. Sometimes it is also accompanied by empty tags on head 1 and both heads of the 42nd...

I recently got myself a MEK6800D1 I decided to get back up to working condition. After doing some research, I figured that the MIKBUG and MINIBUG portions of the ROM are well documented, but the Engineering Note 100 only lables the last 256 bytes of the ROM "Pattern Data", without ever...

I am at the time working on imaging some 8" floppies written by a Norsk Data machine once, and right now I am trying to figure out the file system. I do find something that looks like a directory structure on the 77th track, but I am having problems finding any information what the numbers mean...

I was looking at a disk image for the Tiki-100 the other day, and one thing that struct me is that in the end of the boot sector of the latest version of the system there's always the following code-snipplet: isk * ; * Forms: * ; * JUMP <adr> Call at <adr>;<adr> is in...

I got hold of a Vectra motherboard not too long ago, and am thinking about getting it up and running. This motherboard is very particular in that it has a 19-pin connector for the powersupply, where one pin is used as key, 15 pins for power and 3 pins for the battery. I have never seen this...

Recently I got hold of this interesting card. It sports a V20, and by the chipset it should be a PC compatible. However, trying it out this turned out more interesting than expected. Mainly, it turns out the ROM is not a BIOS, but features some kind of firmware for some embedded application...

This is just a little pet-project of mine. Last year I built the first cluster, but 10 drives* was not enough to cover the tones of an average song. Now I've upgraded with a second cluster, and now you can finally start to get a grasp on what's playing! (* several drives are used for...

Some time ago, I maxed my 486-25 systems RAM from 20MB to 32MB RAM. The first thing that happened was that EMM386.EXE hung during memory testing, unless I disabled cache for RAM above 16MB in the CMOS settings. I've tried to troubleshoot a bit. Everything seems to work fine with the new RAM...

I recently got hold of the pair of Intel ICE-80 boards, much like the ones pictured on this page: http://www.classiccmp.org/hp/multibus/multibus.html I'm curious to see if there is any interest in this kind of development gear at all. At the heart of the system is an 8080, with 256 bytes of RAM...

A friend of mine recently found an old NCR DM5 at his workplace. The machine is lacking a keyboard, and has no expansion cards. So from what I understand, this is a very expandable Z80 machine with NEC uPD7220 graphics. Is it worth picking up even though it lacks a keyboard and expansions are...

I recently made this overview/teardown review of the Norwegian Tiki-100 computer from 1984. In this video, I go over the design, the hardware and at the end there is a demonstration of some simple software for it. Enjoy! (This machine was, due to a decission by the government, popular in...

Recently I came by a "The PC+" turbo-XT motherboard, but unfortunately it has no BIOS. Does this machine require a custom BIOS, or would any clone-BIOS work just fine? I have little experience with XT and turbo-XT clones, and I have no idea on how much variation there was between the different...

I got a NTSC C64 now, but it has certain problems. When powered on, it sometimes sets up a frame, sometimes not, but in most cases it will fill the display with random symbols and characters before either going to black screen or lock itself in some loop where the screen flickers between two...