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  1. S

    Measuring small resistances.

    Ha, no worries, I thought it might be of interest to a few peeps in here. Yeah, 16-bit won't cut the mustard! The actual "sense" measurement is taken with a 24-bit ADC operating in single ended mode, the reason being that it's fed from (what was a burr brown) differential precision fixed gain...
  2. S

    Measuring small resistances.

    4 wire kelvin, so yeah, there's no calibration requirement on the (correctly wired) kelvin "clip type" probes since force/source are connected at the same point, for point probes there is an additional resistance that has to be calibrated out for those specific probes, since I am including an...
  3. S

    Measuring small resistances.

    No plans too really. It was more a case of me being able to create something that I know the accuracy and behaviour of against paying the same, or much more, for an off the shelf solution. There's quite a few on AliExpress, but once you start looking at reputable places you start adding zeros...
  4. S

    Measuring small resistances.

    Yet another side project/rabbit hole, although this one was reasonably quick from start to finish, the PCB is being made in china as we speak, so I'm currently using the incredibly hacked together prototype that consists on components on strip board with capacitors and other stuff tacked to legs...
  5. S

    Realtime Graphics / Game Engines

    @SharkyUK I can't believe that the 2600 image there doesn't have E.T as the game.
  6. S

    Powered by insomnia, I started writing sonic the hedgehog

    Don't mention the sign! I haven't yet got over the amount of stress that caused me. The thing is, I'm somewhat of a perfectionist, I have a vision of how things should be and that's how they should be when it's finished, I can't even think about that particular project without breaking out...
  7. S

    Powered by insomnia, I started writing sonic the hedgehog

    too f**king right! The EPROM emulator is turning out to be a pig to debug, not because it's particularly difficult, but because my logic analyser only has 16 channels, and you can only buy 16 channel analysers for a reasonable price, once you jump to 32 to price gets silly and realistically, I...
  8. S

    Powered by insomnia, I started writing sonic the hedgehog

    B E A UTIFUL. They're such legends, I honestly think I'd fangirl so much if I ever met them, might have to fire up TID in a bit!
  9. S

    Powered by insomnia, I started writing sonic the hedgehog

    I'm also a glutton for punishment, since the premise I used to start this was basically to get back into the mindset of the kind of tricks you use to write games on these systems, so the end game was always my own game. Running stuff quickly on real hardware is useful for development, so as...
  10. S

    Powered by insomnia, I started writing sonic the hedgehog

    What I love about Sonic is the sheer attention to detail, yes there are flaws/bugs with the logic bug you have to put this in the context of it being the early 90's, on hardware that often required "thinking out of the box" to get the impossible done, the special stage in sonic is one such...
  11. S

    Powered by insomnia, I started writing sonic the hedgehog

    I didn't know that, will check it out, cheers.
  12. S

    Powered by insomnia, I started writing sonic the hedgehog

    So here's sonic "behind the scenes", this visually shows how sonic works, these are debug modes I built into the engine as I developed it because without it, doing stuff like this is utterly impossible. Right at the start of the video there's a little pause while I try to remember what keys...
  13. S

    Powered by insomnia, I started writing sonic the hedgehog

    I'll upload another vid in a bit, I have a whole load of other debug information that is visual that shows how the game actually works. The megadrive is a pretty awesome bit of engineering, sonic really set a flag in the ground saying "this is what you can actually do", SEGA's output on the...
  14. S

    Powered by insomnia, I started writing sonic the hedgehog

    This took about 2 months to get from zero to this, but a considerable amount of time was eaten up extracting the data from the original game and getting it into a format I could use. I ended up writing a massive utility that extracted data from both the original ROM and also from the...
  15. S

    Powered by insomnia, I started writing sonic the hedgehog

    Sonic is massively more impressive than Mario, both visually and technically. Play Mario and sonic side by side today and you realise just how basic Mario actually is in comparison, you wouldn't think they're of the same era (snes Mario vs sonic)
  16. S

    Powered by insomnia, I started writing sonic the hedgehog

    Do it, your frogger looks amazing It was kind of fun just documenting it as I went along. both as an exercise in understanding how the megadrive hardware worked, but the kind of tricks Yugi Naka came up with to make this game work, and work as well as it did, it's still hugely impressive today...
  17. S

    Powered by insomnia, I started writing sonic the hedgehog

    I have pretty bad insomnia, so I try to do something productive when it's at its worst. back in the 8/16-bit days I wrote quite a few games, the last one I wrote was a r-type style game that I did with a friend which was written in assembler and ran under DOS (I had a 386 at the time, probably...
  18. S

    Realtime Graphics / Game Engines

    I describe it is programmers brains being wired differently, it's one of those skills that I think you can either do or you can't - it's like playing the bass guitar, it's easy to play badly, it's much harder to play well. I did comp-sci at university back when they actually taught proper...
  19. S

    USB-C - Software people??

    USB is a host/device protocol, it's 1:1. HDMI is source/sink so it's possible to split and forward stuff from one source to multiple sinks, there is EDID which flows back the other way but HDMI splitters generally either mirror or fake some kind of response to keep the other end happy.
  20. S

    Farewell VirginMedia...

    Community Fibre. I think it's pretty much London only, but they're installing equipment on telegraph poles all around here, it's fibre from a box at there top of that straight into the house.
  21. S

    Farewell VirginMedia...

    I was on a business account on VM, so I had a higher upload than the residential packages, but this is just insane.
  22. S

    Farewell VirginMedia...

  23. S

    M1 Mac's

    Yeah, I do. To give you an idea of just how good it is, I had a DTK and the first time I powered it up I was blown away with just how fast it was, it wasn't "a little bit better" than the intel mac I use as a daily driver, it was like silly fast. When the DTK went back to Apple, I bought my...
  24. S

    New iPhone 13, Apple Watch & iPad mini

    Don't blame me, it's the voices in my head telling me what to say!
  25. S

    New iPhone 13, Apple Watch & iPad mini

    Your second statement is the exact reason why your first statement isn't an option! The finish on the red body is beautiful, it's a very rich brushed anodized finish, I can't state just how beautiful it actually is in person. All my previous watches have either been in grey or black, so I went...
  26. S

    New iPhone 13, Apple Watch & iPad mini

    I sent my mock-up to Craig Federaghi and he just replied!
  27. S

    New iPhone 13, Apple Watch & iPad mini

    I seriously would kill for a product RED Milanese loop, I did a quick mock-up.
  28. S

    New iPhone 13, Apple Watch & iPad mini

    Went to Kingston and picked it up earlier, the red is f**king lovely, all my previous watches have been in grey/black, but I’ve been digging the red for a while, I have the product red leather case for my phone which is what started me on the red journey. crap photo because I took the picture...
  29. S

    New iPhone 13, Apple Watch & iPad mini

    Oh no, I probably should have said about that as well, I had to put down cash for the DTK, I needed the machine. What actually happened was once the DTK programme had ended, they sent everybody who had a unit this: To say that they under estimated just how much offering developers, testing...
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