- I'd just like to jump in here. I don't know what you guys are talking about
- with functions and procedures with C/C++ etc. as I only program in Java.
- I would just like to explain the VDU that I built (and designed) without the
- nervousness that I had as a beginning commentator.
- Here goes:
- First of all, I built this horribly. I could have built it much more compact.
- The images are stored in D-flip flops that you edit with the levers. The
- save button activates all the D-flip flops in one image to save the image
- into them. Each D-flip flop controls one pixel, being one bit of memory.
- That makes each image 256 bits, or 32 bytes. The screen also stores its
- memory in an array of D-flip flops, almost exactly the same as the ones
- that store the images permanently. The "save" feature on the screen
- memory, however, is activated every time you load an image. What
- happens is when you press a load button a signal is sent through from the
- array of D-flip flops that contains the image into the array for the screen.
- The screen then saves it until the next time an image is loaded. The clear-
- screen button saves the status of the screen's D-flip flops without loading
- an image, which in most cases will clear the screen. If you load an image
- then quickly press the clear screen button though, it won't clear the
- screen. That's about all there is to it, although I may also add that during
- the debugging after I built it, I encountered a problem in the screen in
- which sometimes the D-flip flops would emit a rapid pulse and cause the
- sticky pistons to push out and pull in too quickly to pull its block back
- with it. I fixed this by simply changing all the repeaters hooked to the
- screen to a three tick delay instead of one. This took me a week to build, I
- spent 1-2 hours a day on it. I thought of the plans in my head, and despite
- what many people seem to think, it was extremely simple. I built all the
- parts separately then assembled them in MCEdit, as you can see if you
- download the map and fly over the enormous dirt wall. That's all. I'll
- probably use pastebin to post this so that I don't use like 5 comments.
Ian5133 Apr 20th, 2012 2,871 Never
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