Phosphorus

Thanks for the helpful reply DanBoris. I am still a bit stuck however, I need detailed information (as detailed as the Stella Docs) on how precisely to render the screen. Coupled with as much information on the TIA chip as possible, then I should be able to get some video output set up. Everything else is going very well, it is just this spot that hinders my progress.

Hello there! I am currently writing an Atari2600 emulator for Windows (32). So far, things have been going quite swimmingly; all the basic CPU core & Op-codes have been implemented, certain PD games are actually running and so on but I have hit on a proverbial brick wall. This steep, slippery wall is: Video Output! Yes the registers, in fact pretty much everything to do with it have me twisted up in seemingly endless balls of twine. Now we all know that the video and sound output is produced through the TIA chip, and the output is somehow formed by writing data into the TIA registers. And then the video Output in drawn at 3 times the clock speed of the CPU (3.75MHZ). Now one of (my) biggest problems is that this is all of course done in real time, and thus quite a bit trickier than your regular electron beam output, as you can command that one! This all sounds very good in theory (well not really actually) but in practicality I just need something, some ray of light to get me started upon scaling this brick wall; could anyone here supply the climbing gear? .