Programming Discussion Thread
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Programming Discussion Thread
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10-24-2012, 08:17 AM
 (10-24-2012, 02:51 AM)NaturalViolence Wrote: The project googlecode page has a forum? Since when? Which, of course, is what i meant, as apparently they're different.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X RAM: 16GB GPU: Radeon Vega 56 
Been debugging my emulated GameBoy Z80 (it's mostly finished) and LCD screen recently. The only graphical things I've done so far are the timings and writing to the scanline register (which is turning out to be quite important to get Tetris to boot). Not far enough to quite start drawing tile data yet, but I think I'm getting there. Having played emulators for like a decade now, it's great to be building one myself, finding out how a system works on various levels. Hopefully something productive will come of it.
11-04-2012, 06:54 AM
More progress :3 Finally figured out where my emulated CPU was failing (pesky jumps). Finally got a working emulated LCD screen.
![[Image: dpqfa.png]](http://i.imgur.com/dpqfa.png) Need to get scrolling done, then I'll mess around with I/O registers. 11-06-2012, 08:57 AM
That's a nice project Shonumi!
Are you writing it all from scratch? What documentation do you use? Perhaps I'll give it a go. :3 Quote:Finally figured out where my emulated CPU was failing (pesky jumps)It's always satisfying to finally solve a problem.  Are you just rendering random data, or is it an actual game? 11-06-2012, 09:23 AM
@Garteal - I'm writing it from scratch. I'm using various emulators and their source code as a base for many of the z80 operations. There's a good GB CPU PDF out there that's very helpful as well. Also, Imran Nazar's Javascript GB Emu tutorials are what I'm using to understand the emulation concepts. The only thing major it doesn't cover seems to be sound, there's some decent documentation out there.
The screenshot is from a test ROM someone made for GB hacking. It's basically a little demo with a space ship that moves around. The rocks there are for the background. It's not cropped to the GB's 160x144 LCD, since I haven't implemented scrolling. When my emulated CPU was broken, I couldn't get the program to write anything to VRAM, but I finally got it to work, so I can move onto other things 
11-08-2012, 07:10 AM
Shonumi,
What style of emulation do you use? Interpreter? Recompiler? Both?
My Configurations:
CPU: Intel i5 4200U RAM: 6GB 1600 MHz GPU: NVIDIA GeForce GT 740M OS: Windows 8 x64 11-08-2012, 03:34 PM
Just using a regular interpreter to emulate the CPU. This is my first attempt at making an emulator myself, so I wanted to stick to something basic. Once I start expanding, gaining more skills, and after I actually finish making this one work, I'd like to make a Z80 recompiler just to get more familiar with how recompilers can be implemented in emulators. I'd also like the chance to finally learn some x86, x64, and even ARM assembly. That's all in the future though. For now though, still sorting out a few of the LCD registers, and then getting input to work. It's been a fun educational experience so far
11-08-2012, 09:52 PM
I'm taking a class called compiler constructions and i have absolutely no idea what you're talking about
......?????
11-09-2012, 05:56 AM
Today, we learned about loops, and what different types there are
Only pseudocode though, but i know how to do it in C# anyway
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