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TI-99/4A Actionscript emulator

AS3 FLASH HAXE TI-99/4a Emulator

8 replies to this topic

#1 Francesco OFFLINE  

Francesco

    Space Invader

  • 14 posts
  • Location:Torino, Italy

Posted Sun Oct 7, 2012 11:45 AM

Hi to everybody,
I have coded several Action Script emulators such as Sega SC-3000, Sega Master System, Coleco Vision, MSX1 and some arcade games ( Pengo, Crush Roller, Pac Man, Lady Bug, Solomon's key and Bomb Jack ). I always have wanted to learn more about the TI-99/4a, and maybe to code a special online emulator.

Can you suggest me a good doc to read to learn how this computer works? I mean, something that let me go deep in the hardware, which talks about hardware specs, memory map, bios, functions, I/O, everything... Is there something that explains what happens when you turn on the machine with or without a cartridge, or how the memory mapped I/O ports are read or written ? :)

What is the Ti99 Bible ?

Thank you.

#2 lucien2 OFFLINE  

lucien2

    Moonsweeper

  • 250 posts
  • Location:Switzerland

Posted Sun Oct 7, 2012 12:13 PM

Here is the bible: http://nouspikel.gro...titechpages.htm

And the TI assembler manual: http://www.retroclou...bler_Manual.pdf

#3 retroclouds OFFLINE  

retroclouds

    Stargunner

  • 1,370 posts
  • Location:Germany

Posted Sun Oct 7, 2012 1:14 PM

Good luck! :-)

#4 RXB OFFLINE  

RXB

    Stargunner

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  • Location:Vancouver, Washington, USA

Posted Sun Oct 7, 2012 1:25 PM

Oddly there is information in the GPL manuals that will be useful.

http://www.retroclou...mmers_guide.pdf

With out the GROMs on the TI it would be a pretty dull machine and would have never become popular.

The GROMs were badly done but that is the way things go.

#5 Tursi OFFLINE  

Tursi

    River Patroller

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  • Location:BUR

Posted Sun Oct 7, 2012 6:29 PM

Well, that sounds fun!

The TI is probably closest to the ColecoVision on that list - same sound and graphics chip. :)

#6 Francesco OFFLINE  

Francesco

    Space Invader

  • Topic Starter
  • 14 posts
  • Location:Torino, Italy

Posted Mon Oct 8, 2012 12:06 AM

Thank you very much for the precious information. This is a good starting point. I'll read everything and I will update you soon. There will be probably things I will ask you :) Thanks again.

#7 sometimes99er OFFLINE  

sometimes99er

    River Patroller

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Posted Mon Oct 8, 2012 3:44 AM

:)

Edited by sometimes99er, Wed Oct 10, 2012 1:50 AM.


#8 Vorticon OFFLINE  

Vorticon

    Stargunner

  • 1,279 posts
  • Location:Eagan, MN, USA

Posted Mon Oct 8, 2012 6:35 AM

Thank you very much for the precious information. This is a good starting point. I'll read everything and I will update you soon. There will be probably things I will ask you :) Thanks again.

Read everything eh? You must have a serious case of insomnia :grin: That said, an online emulator would be utterly cool and especially handy for mobile devices. I hope you can bring this project to fruition.

#9 Francesco OFFLINE  

Francesco

    Space Invader

  • Topic Starter
  • 14 posts
  • Location:Torino, Italy

Posted Wed Oct 10, 2012 1:05 AM

No, unfortunately I haven't insomnia, that would help doing much more things :) However I'm reading the docs, and it's an interesting machine. Questions regarding the architecture of the system are coming to my mind, but for now I'm just reading :)





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