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SirCmpwn

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Writing an Emulator
« on: April 28, 2010, 08:51:34 am »
Hello,
So, not to start another project, but I've been thinking about having this one on the (very far) side.  I want to write an 83+ emulator for my Zune.  Where can I find information about all of the hardware on a TI-83+?  In detail?  Also, all of the opcodes and thier descriptions, including undocumented ones?
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Offline Galandros

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Re: Writing an Emulator
« Reply #1 on: April 28, 2010, 09:00:04 am »
First the z80 processor:
See the z80 documentation from zilog. (search it)
An instruction set, like calcmaniac84 one: http://www.ticalc.org/archives/files/fileinfo/427/42722.html
(it has all opcodes, flags and what it does)


For the TI-83+ hardware:
See in WikiTI general information about TIOS memory layout and ports:
http://wikiti.brandonw.net/index.php?title=Calculator_Documentation

I saw a post in Maxcoderz from benryves saying the minimal ram, rom and ports behaviour to boot the TI-83+ OS. Maybe in a help thread or PindurTI thread.

You can always see the Wabbitemu, PindurTI and other emulators source code.

Good luck.
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Offline willrandship

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Re: Writing an Emulator
« Reply #2 on: April 28, 2010, 09:08:51 am »
If you're good at reading source code, you might want to check out the source code of one. I don't know if your zune will be powerful enough, though, how much power does it have?
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Offline DJ Omnimaga

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Re: Writing an Emulator
« Reply #3 on: April 28, 2010, 10:21:21 am »
WabbitEmu and PTI source code is available?
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Offline calc84maniac

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Re: Writing an Emulator
« Reply #4 on: April 28, 2010, 10:43:28 am »
Quote from: DJ Omnimaga on April 28, 2010, 10:21:21 am
WabbitEmu and PTI source code is available?
I know WabbitEmu is open source, not sure about PTI though (I doubt it). Though Revsoft is currently down, so you can't get Wabbit's source that way right now.
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Offline DJ Omnimaga

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Re: Writing an Emulator
« Reply #5 on: April 28, 2010, 10:45:45 am »
Aaaah ok

I hope RS gets back up x.x
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Offline Galandros

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Re: Writing an Emulator
« Reply #6 on: April 28, 2010, 03:16:19 pm »
Tilem is another open source.

Yes, PindurTI is open source. You can find here: http://sgate.emt.bme.hu/patai/programs/pindurti/

Quote from: DJ Omnimaga on April 28, 2010, 10:45:45 am
Aaaah ok

I hope RS gets back up x.x
Madskillz is working on it. I hope it gets up too.
« Last Edit: April 28, 2010, 03:22:50 pm by Galandros »
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SirCmpwn

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Re: Writing an Emulator
« Reply #7 on: April 28, 2010, 04:44:56 pm »
Quote from: willrandship on April 28, 2010, 09:08:51 am
I don't know if your zune will be powerful enough, though, how much power does it have?

To emulate an 8-bit, 8Mgz proccessor?  It uses a 32 bit 399Mgz ARM proccessor with 16 MB of RAM available to my emulator, along with up to 4 GB of storage for anything else I might need.  It has a 320x240 full color LCD screen and runs windows binaries that are coded under XNA.  It can handle a TI-83+.
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Offline calc84maniac

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Re: Writing an Emulator
« Reply #8 on: April 28, 2010, 04:46:18 pm »
You might want to port WabbitDS, it was written for an ARM processor and it's fairly simple.
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SirCmpwn

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Re: Writing an Emulator
« Reply #9 on: April 28, 2010, 04:52:19 pm »
Well, it needs to be in .NET, because that is the only code that the Zune will accept.  I'm thinking of using Ben Ryves Stetson emulator, which I belive is in .NET.
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Offline DJ Omnimaga

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Re: Writing an Emulator
« Reply #10 on: April 28, 2010, 05:40:57 pm »
Quote from: SirCmpwn on April 28, 2010, 04:44:56 pm
Quote from: willrandship on April 28, 2010, 09:08:51 am
I don't know if your zune will be powerful enough, though, how much power does it have?

To emulate an 8-bit, 8Mgz proccessor?  It uses a 32 bit 399Mgz ARM proccessor with 16 MB of RAM available to my emulator, along with up to 4 GB of storage for anything else I might need.  It has a 320x240 full color LCD screen and runs windows binaries that are coded under XNA.  It can handle a TI-83+.
Oh not to nitpick on spelling too much, but I wanted to point it out in case you would post it on a place like Cemetech where they're uptight about grammar, but assuming you mean megahertz, it's MHz, not Mgz. :P (just saying as you used Mgz yesterday on IRC)
« Last Edit: April 28, 2010, 05:41:27 pm by DJ Omnimaga »
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SirCmpwn

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Re: Writing an Emulator
« Reply #11 on: April 28, 2010, 05:42:03 pm »
Woops, I misspelled it this morning and have not been able to spell it right all day.  MHz, MHz, MHz, Mgz, MHz... wait, dammit!
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Offline DJ Omnimaga

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Re: Writing an Emulator
« Reply #12 on: April 28, 2010, 05:43:31 pm »
lol ok :P

just wanted to point it out :P

I also noticed several people uses nSpire, while in fact it's Nspire :P
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Offline willrandship

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Re: Writing an Emulator
« Reply #13 on: April 28, 2010, 09:16:11 pm »
I've never really been sure. Thanks for pointing it out!
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SirCmpwn

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Re: Writing an Emulator
« Reply #14 on: April 28, 2010, 09:29:32 pm »
So, writing an emulator has become porting an emulator.  I got ahold of the source code for Ben Ryves Stetson, a C# based emulator for the TI-83+.  I'm porting it to my Zune as soon as I get the time.
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