Joyrex

I am interested in learning how to solder, so I got a cheap soldering iron from Aldi when it came out one week. I started soldering some small kits like the WeevilEye Beginner's Kit, the Badge Rocket Kit, and the Velleman Crawling Microbug Kit. I also tried the Crystal Radio Kit which was crappier (no instructions) and I didn't get to work. The solders felt good though, so I think it's more for me not understanding how it worked or not being around reception.

After those I decided to move up to something bigger. That led to me getting the Maximite Colour Kit. This is a printed board with a PIC chip already attached to it. Everything else you have to solder on yourself. This includes two things that are surface-mount soldered on, which I had never done before.

Picture of all the parts, unsoldered

I started small, with the resistors and worked bigger, except for a tiny tiny tiny tiny capacitor that I didn't even realise was something that needed soldering. About halfway through (during the capacitors) the ALDI soldering iron cooked itself. That ended all work for the weekend.

The ALDI soldering iron had a short life overall, but it taught me some stuff; enough to know what I really wanted. I had no idea what temperature it went to (hot enough, but no idea how hot) or if it was fully warmed up (no light or anything). Both were extremely annoying. Using this as an opportunity to not get stuck in that situation again, I got what seems to be a popular consumer-level soldering iron, a Hakko FX-888D from Mektronics (cheapest place I saw it). It's likely overkill for what I need (5 presets, a locking mechanism), but it has a digital temperature setting and a light to tell you when it has heated up, so I'm happy.

Weekend two of the build with the Hakko FX-888D in the picture

With the new soldering iron, I was able to continue my work the following weekend. I was mostly done with the small stuff, except for one piece I mentioned before, a 10mf capacitor. I saw it mentioned here, and once I found the spot on the board for it (it took a minute, it's near the PIC), I realised it had to be surface mounted. This was a challenge. Not only is this the first surface mount soldering I've done, the piece is tiny (1.5mm x 1mm). I did some googling about how to do surface mount soldering, and from this I realised that there was already solder on the pads (came with it). I was able to heat the existing stuff and push it down without burning the board. I think it's OK. After that, doing the surface mounts for the SD card reader was pretty easy.

Finally, I had it all together.

Soldered and put together

Of course as soon as I plugged in the power... nothing happened. So now I get to learn how to use a multimeter and test solders/components. To be continued...

I enjoy soldering. There's a nice zen-like quality to doing it. Flip on some music and zone out as I put it all together. It might be different if I was working under a timelimit or not for myself, but right now it's good.

5x86 Intro

In July 2018, I found an ebay listing for a 5x86 133Mhz desktop machine with a video card, network card, 16M of RAM, a clone Sound Blaster card, a CD-ROM drive, and a 650M hard drive.

The motherboard is, I believe, a BEK-P407. I was able to find images that are scans of the instruction booklet here. There's a local copy here.

From that, I deduced I was able to get 128M total, so I ordered 128MB (2X64MB) FPM PARITY 60NS SIMM 72-PIN 5V 16X36 DIMMs off eBay. On installation though, the system wouldn't start. Swapping around the old DIMMs and the new in different configurations, I could only get 20MB total. I am not sure why yet.

I initially triple booted it with OS/2 Warp 4, FreeDOS 1.2, and Slackware 11. I got the network card working on each install, as well as the sound card. In addition I also ordered from eBay:

  • A new serial mouse (the one I got with the computer could only scroll horizontally)
  • A new Gravis Gamepad

Then I decided I needed more disk space for the OSs and the software/games I was planning to install, so I purchased from eBay:

  • 2 compact flash (CF) card –> IDE adapter cards
  • 2 CF cards, 1x2GB and 1x8GB
  • Various splitters/adapters/cables for molex connectors, floppy-sized power connectors, and PATA IDE cables

The first extra IDE cable I got wouldn't fit the motherboard due to the cable having a blocked out pin and the motherboard not having that. It seems damn near impossible to cheapely find old PATA IDE cables that didn't have a blocked pin, so I got an adapter to handle that sort of cable. Then I set up the disks like so:

  • Primary Master: 8GB CF card through adapter
  • Primary Slave: 2GB CF card through adapter
  • Secondary Master: none
  • Secondary Slave: CD-ROM drive

In future posts I will go over the installs of different OSs I've done, as well as the minor physical restoration of the desktop.

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