Posts tagged Amiga

Amiga 1200 Power Supply Made From An Old ATX Power Supply

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I was having some issues with my A1200 constantly crashing and resetting, and at the time I had been using an old, original white power supply box. A friend of mine had suggested that I get a new one, as the caps might be going bad in it. It would certainly explain the resets at random occasions and a few other things, so rather than buy a new one, I decided to convert an old ATX power supply I had laying around and make use of it.

As with all things power related, if you plan on trying to make one of these things at home, make sure it is unplugged and de-energized! I will not be held responsible for anyone electrocuting themselves!

So, what do we need to get going?

  • An old ATX power supply, any size will do. I used an old 250watt supply.
  • An old Amiga Power Supply or Power Connector
  • Multimeter
  • On/Off switch. I was creative and re-used one (See Below)
  • Crimp Tool/Insulation Tape

Step 1 – Prepare the Power Connector

Before we can start, we need to be able to connect the power to the Amiga. The best way to do this is to acquire one from an old Amiga supply. Most Amiga fans have several laying around, I used one from an old supply I had brought over from England years ago. It’s not much use to me here in the USA anyways 🙂

Open up the power supply, and cut out the wire at the base of the transformer. This will give you the maximum amount of length available on the new project. You can of course cut it down if you want a shorter one. My current desk doesn’t have a very good power layout, so having a 6 foot cord worked out quite well.

Step 2 – Acquire A Power Switch

Due to the ATX power supply needing a short to work, the best and easiest way to regulate this is to use a simple power switch. Being creative, I used the one that was already in my existing Amiga PSU and cut it out with a length of wire. It also helps to keep it a little more nostalgic!

Step 3 – Prepare the ATX Power Supply

The easiest way to make this work is to cut off one of the Molex connectors on the line that powers a HD. Most ATX supplies have some that are longer than the rest, just cut the plug off the end. You also need to cut the Blue line from the ATX Motherboard connector (-12V). Make sure to clean the other end up, so theres no exposed wiring hanging around. In the next step, there is a table showing the common colour codes for the Amiga wiring.

Step 4 – Assemble The Wires Together

Theres a number of different ways to connect the wiring, some people prefer to just twist wires together and tape them, but you can also use a crimping tool, or a terminal block. The good thing with terminal blocks during the testing phases is that you can swap the wires around if you do manage to get them mixed up. Below is a table showing the common wiring colours of the Amiga to ATX connections. Some Commodore wires may vary in colour, if this is the case, see below to determine how to make sure you have the right ones. It is crucial that it be correct before it is plugged into your Amiga. Don’t blow it up!

Assemble/Connect the wires as shown in the table. Make sure they are safe from coming into contact with each other.

Amiga Wire ColourATX Wire ColourVoltage/Supply
RedRed+5V
BlackBlack0V/Ground
BrownYellow+12V
WhiteBlue-12V

Step 5 – Connect The Power Switch

20150328_103058_HDR_resized.jpgNow we need to connect the power plug to the ATX supply. On a normal motherboard, this is done by shorting out 2 pins together. This is why using a switch makes the job perfect. The simple way to acheive this is to look at the blue wire we cut off the motherboard connector. The pins to short are directly next to it (See the picture above) in the form of the Green & Black wires.

Cut these wires and follow them up to the power supply, you can then attach the switch directly to these Green & Black wires and voila! You now have a working switch. When the switch is on, the power supply will work, and then flick the switch to turn it off again. Remember, not all ATX power supplies have a power switch in the back of them, so this is a perfect solution to the problem.

Step 6 – Test The Crap Out Of Your Wiring!

Amiga A1200 Power Pin Out.jpgI can’t stress enough that you DO NOT plug this new power supply into your Amiga until you have FULLY tested that it’s wired up correctly. If even one wire is not correct, your Amiga would be toast. Take the time to test your work, before plugging it in! All you need is a simple multimeter to read the voltages.

I drew a quick diagram of how to read the values. When you are holding the ATX side of the power plug and looking directly at the pins, each one should measure exactly as they are pictured in the diagram. Place the Negative electrode on the outer shield of the connector, and touch the Positive electrode on each of the pins. You should get very close to the values shown. If a wire is in the wrong location, then you need to fix it and test it again. It’s extra-important to test this when your Amiga wires don’t match the colour table above.

Step 7 – Give it a whirl!

When you are confident your wiring is all good, you can give it a try in your Amiga! She should boot up just the same as before, so take note if any wierd behaviour occurs. In my case, my A1200 booted a lot quicker and almost all my crashes and random resets stopped happening. It wasn’t until I did this, I realized how bad my original power supply really was!

If you have any questions about this, feel free to ask them in the comments. I hope you find this useful!

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Twinz Loading Screen

Twinz! Free Version Released For Android

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Twinz Loading ScreenIt has been a long time since I last worked on one of my own game projects, so it is nice to be able to say that I have finally released a new game 🙂 The game is called Twinz! and is based on an game I wrote back on the Commodore Amiga back in 1996 (HOL Link). The original game it was based on was written by Theo Develegas on the ZX Spectrum (WOS LINK) back in 1991, it was a covertape game that I liked to play and back then, I wanted to have a go at doing one myself. If you asked people to load games from cassette tape nowadays, they would have a heart attack! hehe.

The objective of the game is very simple, you turn over 2 tiles at a time to see if the pictures behind them match. If they do, then they stay open and you keep going. If they don’t match, they turn back over. The logic to the game comes from remembering the images behind each tile, so when you find it somewhere else you can turn it over at the right place. Points are awarded for better playing tactics (tiles that are not checked underneath lots of times) and pairs that are found in sequence (one after the other). The game features 5 levels, three difficulties, and an online high score sharing system where you can post your best scores directly from within the game.

Twinz is compatible on any mobile or tablet device. Releases coming for Kindle fire soon, along with iPhone/iPad and other markets. Stay tuned!

Twinz! Screenshots – Click any thumbnail to make it larger

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Moving To A New House!

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This weekend is going to be crazy as I plan to move into a new house in the Adamstown, PA area. Its a single-floor rancher house, with a basement the entire size of the house.

The new house has a lot more room, as it has a nice garage that will hold 1 car and all my tools, a huge basement thats at least 3x the size of the current one (which means more room to hold all my Commodore Amiga & Atari machines!) and plenty of other things that the family can enjoy, such as a huge deck in the back. Great for keg parties!

Attached below are some pictures I took of the house, before it becomes full of computer parts!

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Finally Finished Working On My Amiga A1200

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AMIIGGGAAHH!I Spent quite a bit of time this weekend working on my Amiga. It has been a few years since I used it for anything other than recording music (for CVGM.net) and thought it was about time I got it working again. For quite a while now I have had the itch to get back into programming on the Amiga, and couldn’t think of a better time. Its also not that often lately that I have a few hours of downtime to actually devote to filling the entire kitchen with old computer stuff 🙂

Over the years as a programmer on the Amiga, I have accumulated a fair amount of Amigas, and also bought a few bits here and there. All my Amiga 1200’s are PAL, and every time I fly home to the UK I always bring one back with me if I can find one. On my trip last year, I was able to find an “Desktop Dynamite” pack for 50 quid, so I threw away a bunch of closes and packed my suitcase with wonderful Amiga goodness instead. The machine I had been using previously had a broken pin on the PCMCIA slot, which seems to be a common thing to break on all my Amiga machines over the years.

Amiga 1200 Catweasel HDThe most useful device I ever bought for my Amiga was my Catweasel A1200, it lets me hook up all kinds of drives to the system, and access them natively. In this modification, I will be replacing the built-in floppy with a PC drive. It will prevent me from booting via floppy disk, but the benefits of being able to read Amiga and PC disks while in Workbench are worth it. I also have a Scandy VGA ScanDoubler device thingy that clips over top of some of the chips in the Amiga and lets me connect it directly to a VGA monitor, though I tend to run into a few problems from time to time with it (it might be because my PAL Amiga doesn’t like it, I bought it in the US so it might be NTSC based) such as the screen flickering green or with a tint of blue. For this particular project, I have decided to leave it out of the system and I will put it back in another time. For now, I will settle for my 1084S and a nice Interlaced screen.

Amiga Hard Drive In The PCThe hardest part about working on the Amiga is getting the hard drive working. By default, the Amiga has a size limit of 4gb. I had bought 2 4Gb IBM HD’s online for $1 through Ebay just for this. Now we had to get them working on the Amiga! This is where UAE comes in. One of the nice new features of the newer UAE is the ability to connect Amiga hard drives natively and use them like a real hard drive, instead of the traditional HDF files. It does however still have some problems. It cannot yet (at the time of writing anyways) partition the drive correctly, so all the partition work must be done on the real Amiga. This was a bit of a ballache for me, as I have every Workbench disk except the Install disk (that contained HDToolbox) so I ended up connecting my A2000HD and using an old version from there, just to get the partitions going. From there, I could connect to the drive to the PC and mount it natively.

To begin with, I tried to copy a version of AmiKit to the drive. The copy process went very well, however I ran into a lot of problems getting it to work on the real Amiga. After a few hours of trying to get it to boot, and never reahing the desktop, I decided to take another approach and instead I went with a more simplified Workbench from ClassicWB (http://classicwb.abime.net/) which only required my OS 3.9 CD. The bare basic programs and tools were installed, which was enough to get me started at this point. I added some more games and demos for WHDLoad, and that’s all I really needed. I also took advantage of being online with UAE, and added the newest Catweasel drivers, and a few other tools.

My Amiga has a wireless Netgear card, and I need to use the prism2.device to get it to connect to the network. Once I get moved into my new place next week, I will get that all set up and working. I tried briefly with the Genesis TCP stack and just couldn’t get it to see the card. Nothing like browsing the web on a 16 colour Amiga Interlaced screen! Oh how modern day kids are spoiled!

Detailed Amiga Specs: Commodore Amiga 1200 (PAL, Personally Purchased From the UK), DKB 1240 & 32Mb RAM (030 & 6882 FPU), Catweasel A1200, 4Gb IBM HD, OS 3.9 w/Boing Bag 1 & 2, ClassicWB Image.

Some Pictures Of Beauty:

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Messing About With The Site

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So, ive been tweaking around with the site quite a bit today instead of coding. I actually found a WordPress theme that I really liked, so I went ahead and installed it with a few other bits and bobs. The theme is called Mystique and is one of the free themes offered by digitalInature.

The old theme had a lot of things I couldn’t do at all, whereas with this one I can now do twitter feeds, ajax to display thinks like post comments and tags (by clicking the icons on the right hand side in the top of the big grey box) and a few other things. I also spent some time fixing the Gravatar stuff, so if you have an account at gravatar.com (free) this site will now use your avatar from there.

There are still a few things left to do, I plan to list a complete discography of all my games and projects, and for the ones that I have a lot of fond memories for, I will eventually list pages for each of those items. Feel free to remind me of anything special I did years ago that I might have forgotten about!

Ive also started working on an Amiga section, and added a couple of things to it to get me started. Enjoy!

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Using MorphOS Again For the First Time In Years!

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Finally getting somewhere 🙂

In the last week or so, I have been convinced to un-box my Pegasos II motherboard and boot it up to have a play around with it. It has been at least 3 or 4 years since I last even looked at the board, let alone turned it on. I got the board when I was employed with Epic Interactive, as I ported several games to MorphOS/Mac/Linux at the same time. At that time, I was using MorphOS 1.4 which was very buggy and not very intuitive. While it was nice to be able to run all of my old Amiga apps again, the instability of the OS made it a very troubling task. I still remember the nightmares I had trying to get various ports to build correctly without crashing the system, or editing code changes. Good old days 🙂

After playing around with the Open Firmware (which I am quite sure is horribly out of date) I was able to figure out how to boot the Peg from the CD, and install the OS to the hard drive. It took me a little while to get used to where the different settings were, then I couldn’t figure out why it wouldn’t see the HD, until I realiszed it wasn’t in RDB mode. After that, slapped on a few Amiga partitions and bingo, off it went.

My experience in the short time I have played with the OS is that it is much nicer and cleaner than it used to be. It has come a long way with the new Ambient and other tools. I will take a full play with it and even get it online in the next few days to see just what is out there and available for it. I was very happy to see that they finally included a TCP stack as standard that didn’t have to be registered by itself to use fully. As much as I loved Miami (and did pay for it back in the days of the Amiga), I don’t have my keys anymore and wasn’t able to get Nordic to re-issue them to me.

As much as I would like to start making games for MorphOS again, im not sure if I want to pay the $111 euros to get a license key for something I won’t use all that often, and still not even sure if it’s something thats worth developing for. Based on the price alone, which is a little bit less than buying the new Windows 7 operating system upgrade, i’m sure that there are many people who are still only using the 30 minute restricted version. I have a few games that could be ported, but they will have to wait for a while.

If any MorphOS developers have any free keys they want to give away, feel free to throw one this way 🙂

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