Chip-8 emu

[refraction]

CHIP8

thats my version of the document, myself and doomulation appended a couple of the opcodes to clarify the workings on some of them, the original doc wasnt very clear on them, but we found out the hard way (for example, the Draw function for 16x16 and BCD)

Originally Posted by blueshogun96

Obviously you haven't seen my chip8 emulator. If you think yours was bad, mine was 100x worse! Remember ChipAint?

nope, theres been a million chip8 emus, so its hard to remember each one but success in actually getting the emu to do something is good. my first one was awful too, it was a complete dos text engine, using # as pixels, then doing a cls after each frame and redrawing, was horrid and did about 2fps on a modern machine

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Last edited by refraction; March 27th, 2008 at 03:14.. Reason: Automerged Doublepost

[blueshogun96]

Originally Posted by refraction

CHIP8

thats my version of the document, myself and doomulation appended a couple of the opcodes to clarify the workings on some of them, the original doc wasnt very clear on them, but we found out the hard way (for example, the Draw function for 16x16 and BCD)




nope, theres been a million chip8 emus, so its hard to remember each one but success in actually getting the emu to do something is good. my first one was awful too, it was a complete dos text engine, using # as pixels, then doing a cls after each frame and redrawing, was horrid and did about 2fps on a modern machine

Mine used OpenGL for graphics and used GL_QUADS for sprites (using a 2D orthographic projection). I've seen others used render-to-texture and stuff like that, but IMO that's overkill One problem was the fact that I was too lazy to write a built in debugger thus making me realize how important it is to have one that can show the state of the machine and can show the rom's assembly code.

You know what? All this kinda makes me want to rewrite ChipAint just for fun I'm now getting some more time on my hands to do other projects (and hopefully resurrect some others that I've left to rot) and tbh I was getting a bit lazy lately [due to distractions of the home], so I think I can do it and make it work decently this time

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[refraction]

yea its all quite nostalgic. makes me wanna write those i missed out, gb, nes, sms etc. gb first tho!

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[cottonvibes]

thanks guys for the documentations,
i bookmarked them all.
when i have some free time, i hope to start a project like this

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[Phil]

Originally Posted by refraction

CHIP8

thats my version of the document, myself and doomulation appended a couple of the opcodes to clarify the workings on some of them, the original doc wasnt very clear on them, but we found out the hard way (for example, the Draw function for 16x16 and BCD)




nope, theres been a million chip8 emus, so its hard to remember each one but success in actually getting the emu to do something is good. my first one was awful too, it was a complete dos text engine, using # as pixels, then doing a cls after each frame and redrawing, was horrid and did about 2fps on a modern machine

2 FPS? Now that is what i call quality.

Edit:..all this DOS talk is making me nostaligic too

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[ShendoXT]

Emu updated, check first post for info.

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[Rebel_X]

Nice!!!.. now, any other projects you wanna start, ZX-Spectrum emu for example..

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[shafeen]

nice start there.......

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[ShendoXT]

As suggested on EmuTalk the next step should be Space Invaders arcade emulator. If I find some free time I might start that.

Anyway sound and Schip support added:

Attached Images

	bmpview.PNG (13.3 KB, 21 views)
	worm.PNG (8.1 KB, 14 views)
	dragon1.PNG (10.9 KB, 18 views)
	race.PNG (8.9 KB, 16 views)
	maze.PNG (10.6 KB, 16 views)
	sokoban.PNG (9.1 KB, 17 views)

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[runawayprisoner]

Nice. I still have to tweak a lot of stuffs in my emulator.

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[blueshogun96]

Congratulations Shendo, you are now a successful emu author Good luck on anything else you decide to emulate!

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[Sagat] Windows XP x64 Pro | AMD Athlon 3000+ (~2.0GHz) | NVIDIA GeForce 6600 PCI-E | Realtek AC97 Audio | 512MB Ram | NVIDIA NForce 4-4X chipset | Seagate HDD 160GB | LG 8614 DVD-ROM | HP DVD 1040d CD/DVD -/+ RW w/ LightScribe
[Raylene] HP dv2000 | Windows Vista Home Premium | Intel Core2 Duo @2.2GHz | NVIDIA GeForce 8400 GS 128Mb (Dedicated) + 1264Mb (Shared) | 3GB Ram | 220GB HDD

GeneralEmu - December 27, 2005 and beyond!
Shogun3D Interactive (I try to update it every day now)
Shogun's Cxbx Dev Blog