[technicolour]

Release 1:
http://garryboy.googlecode.com/svn/trunk/GEM

Release Notes:
Speed is still an issue but it should run at real time or close to real time at a decent frame rate on any modern processor.
It'll work in MP kinda, everyone will run their own instance of the emulator with no syncing.
The GPU code is prone to glitches, unless it's something major don't report it.
Only MBC3, MBC1 and ROM games are supported and there's no "bounds", if a game makes a rom banking mistake that a real Gameboy would check for the emulation will likely fail and crash with the stack pointer or program counter overflowing.
Tetris and Pokemon are confirmed to be 100% working, at least at the start. If you find any MBC1, 3 or ROM games which glitch report it to me.
Rom files are currently stored in plain text hex (see below), no rom files are given away in the emulator. Once converted into plain text hex rom files should be stored in GEM/Data/GBZ80 for gameboy.
No saving currently.
Please do not upload this elsewhere.

If you have any issues, glitches or just general questions add me on steam: http://steamcommunity.com/id/fafasafaffagr/home/, please don't contact me if you can't get SVN to work or something.

Rom files are currently read in plain text hex because Lua's binary reading support is incomplete and cannot load roms with the 0D0A character in. a plain text hex file is just that, with each byte being represented by two ASCII hexadecimal character in capitals with no other information. One method to convert to Plain Text Hex is to download the hex editor FlexHex, load the rom there, copy all the hex into NP++ and find replace the spaces. All rom files should be .txt. If someone would like to write a quick python script for the public to convert to plain text hex that'd be great, I'd do it but I'm hoping this is just a temporary measure until binary reading is fixed.

This is a project to completely and quickly emulate the Nintendo Gameboy entirely within GMod Lua (no modules) including multilayer syncing and maybe even sound. Currently we have the CPU Core almost 100% finished and it boasts greater compatibility than Visual Boy Advance. Interrupts, Timers, Timings, and the GPU are all about 99% complete now. Current focus is on optimisation.

The GPU emulates on a frame rather than Scanline basis, this can cause some video effects not to work properly (Like the scrolling in pokemon red's start menu) and priorities are off too. These are both minior issues that shouldn't effect gameplay.

Speed is about 40% in a Laptop's 2Ghz Dual Core i3. I hope to get this up to 100%.

The project started off as a simple Intel 8080 Emulator, running the original Space Invaders.

[Kogitsune]

I have to admit this is really cool. Is this pure ( gmod ) Lua or are there modules helping out?

[Spencer Sharkey]

Wow! Very nice.
Can't wait to see the progress.

[technicolour]

Kogitsune posted:

I have to admit this is really cool. Is this pure ( gmod ) Lua or are there modules helping out?

No modules here sir.

[KnightVista]

I wanna play me some Pokemon.

[c-unitV2]

Well you are in luck!

[jrj996]

He said pokemon, not an attempt at recreating pokemon for GMod.

Well anyway, good job dude!

[GameDev]

Now implement it into an arcade machine and the community will pay billions for it

[thetree]

Hey Techni, been following this on wiremod.com and I have to say this is very impressive. Good job! :D

[Divran]

I could add that the actual entity which the user interacts with is like less than 50% done. I should rewrite it all... it's a bit of a mess right now.

There's also a few details to be sorted out. For example: As you can see, when he uses the screen, he's teleported in front of it and faces it, but that also makes him get stuck in the ground when he gets out. Don't really know how I'll fix that.

[Goz3rr]

Divran posted:

I could add that the actual entity which the user interacts with is like less than 50% done. I should rewrite it all... it's a bit of a mess right now.

There's also a few details to be sorted out. For example: As you can see, when he uses the screen, he's teleported in front of it and faces it, but that also makes him get stuck in the ground when he gets out. Don't really know how I'll fix that.

Save the player pos where he got in and teleport him there when he gets out? That sounds way to simple

[Jvs]

Divran posted:

I could add that the actual entity which the user interacts with is like less than 50% done. I should rewrite it all... it's a bit of a mess right now.

There's also a few details to be sorted out. For example: As you can see, when he uses the screen, he's teleported in front of it and faces it, but that also makes him get stuck in the ground when he gets out. Don't really know how I'll fix that.

Can't you just move the view instead of the whole player?

[amkoc]

Now make it load the Gameboy Camera rom and scare people.

WHO ARE YOU RUNNING FROM?!?

[Osku1234]

INCEPTION

[Divran]

Jvs posted:

Can't you just move the view instead of the whole player?

Kind of defeats the purpose of drawing it 3d in the world.. except for other people watching, I guess.

Goz3rr posted:

Save the player pos where he got in and teleport him there when he gets out? That sounds way to simple

Could try that

[Wolfz]

a game withing a game. Imagine playing bf3 in gmod.

[LuaStoned]

Wolfz posted:

a game withing a game. Imagine playing bf3 in gmod.

Imagine your fps < 10

[Grocel]

The-Stone posted:

Imagine your fps < 10

It would be < 0.

technicolour posted:

As for speed right now the core itself runs at the full 4mhz, although you may be concerned by my 15fps in the above screenshot that's because we're refreshing render target every target rather than merely updating pixels which have changed, furthermore we're displaying the entire 256 by 256 vram background tile map, rather than the 160 × 144 on the actual gameboy. Coupled with the fact that I'm on a slow 2mhz laptop core i3 means we're expecting some really playable gameplay, especially on high end systems.

You still got a 2mhz laptop?

[Poesidan [GAG]]

This would be a fun addition to RP, there would be arcades.

I suggest you give it a new model like a console in a classic arcade. If not, its fine. It would just be awesome enough to play it at all.

Great job! I'll follow this until release.

[_NewBee]

amazing.

[CakeMaster7]

Impressive.

[Divran]

Poesidan [GAG] posted:

I suggest you give it a new model like a console in a classic arcade.

If someone has a model like this

lying around somewhere, I guess I could make it work with that.

[Blackbird88]

I'm impressed. Great job!

[technicolour]

We have our first homebrew rom running, it's all starting to fall into place. (Ignore the junk, that would all be out of view on a normal gameboy, just currently our one shows the full vram map as opposed to just the visible screen for debugging purposes)

[gunguy765]

Keep up the good work

[Justice]

holy shit

[Hentie]

Osku1234 posted:

INCEPTION

What's next? Gameboy homebrew that allows you to create a minigame in gameboy?
A minigame inside a game inside a game?

We have to go deeper.

[freemmaann]

Pretty amazing. You also said you haven't done much in Lua, so even more so.

[Loures]

You are loading ROMs from C right?

[Jvs]

Loures posted:

You are loading ROMs from C right?

Plain pure Lua he said,no modules involved.

[OneWingedAngel8]

Divran posted:

If someone has a model like this

lying around somewhere, I guess I could make it work with that.

I know there are a couple in a Left 4 dead 2 Custom campaign called Suicide blitz, so i guess you could use those.

[B!N4RY]

Sweet! Now I can play a video game inside of a video game!

Anyways great work, looking forward to the release

[GameDev]

Divran posted:

If someone has a model like this

lying around somewhere, I guess I could make it work with that.

I do. I'm not Meow Meow made one for me.

[MendozaMan]

Wow, this is amazing - reminds me of the stuff people do in Little Big Planet, only with more code

[Herr General]

Very cool.

[Loures]

Playing the original pokemon game in GMod makes me very happy.

[Divran]

OneWingedAngel8 posted:

I know there are a couple in a Left 4 dead 2 Custom campaign called Suicide blitz, so i guess you could use those.

I don't have L4D or L4D2.

GameDev posted:

I do. I'm not Meow Meow made one for me.

But that's just a picture :C and it's got a TF2 logo on it

[GameDev]

Divran posted:

I don't have L4D or L4D2.



But that's just a picture :C and it's got a TF2 logo on it

Can be reskinned.

If not, I could port over those L4D Models.

[itak365]

http://www.garrysmod.org/downloads/?a=view&id=114771

http://www.garrysmod.org/downloads/?a=view&id=103554

The second one's actually fairly shitty, but either one would require reskins anyhow.

[technicolour]

Been chasing down bugs in the CPU lately, there's still several but all of the most critical ones have been ironed out. Started to add interrupts and GPU timing.

Commercial games are starting to show life, here's Tetris with my bare-bones debugger on the side.