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Questions tagged [atari-2600]

The Atari 2600 is a 2nd generation home video game console by Atari, Inc. This tag should be used if the question is about the Atari 2600 hardware or cartridges.

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Were some Atari 2600 games written in C?

I thought all Atari 2600 games had been programmed in 6502/6507 assembly language (plus whatever activated the Stella sound system), but at a party recently, a friend indicated that some 2600 ...
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1answer
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Is it known how Space Invaders displayed all the aliens on the Atari 2600?

The Atari 2600 has two 8-bit wide player sprites, and it appears to be these sprites which are used to draw these aliens. There are a few different ways to produce many copies of one sprite; ...
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0answers
361 views

Who or what is the 'AH' credited on the die of the Atari TIA chip next to Jay Miner?

I noticed that on the die shot of the Atari TIA chip, at the top you can see an Atari logo and at the bottom there are two initials: JM + AH. I assume that JM means Jay Miner, but who is the AH? I ...
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1answer
422 views

Fastest way to write 0x00 to a zero-page memory location? (6502, Atari 2600)

I have a kernel in my 6502 game that writes two dots to a sprite, so for example: ........ ........ .XX..XX. .XX..XX. ........ ........ Either 0, 1, or 2 dots can be on at a time. This is done one ...
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2answers
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Who made the Atari 2600 TIA video chip?

At the heart of the Atari 2600 was the TIA video chip, designed by Jay Miner, well known for his later work on the chips for the Atari 400/800 and the Amiga. Who manufactured the TIA? As an in-house ...
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1answer
756 views

How did the Atari 2600's 6507 handle zero page and stack with only 128 bytes of RAM?

The Atari 2600 used a cut-down version of the 6502 called the 6507. The 6507 was cost reduced by not supporting interrupts and (more importantly) having fewer address lines resulting in that it only ...
12
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2answers
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How does Atari 2600 TIA display multiple resolutions in Asteroids?

There is probably an easy explanation for this based on some facet of how the TIA generates the display. As is readily visible in the image taken from a real Atari 2600 displayed on a modern LCD, the ...
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5answers
969 views

How do I rip sounds from Atari 2600 ROMs and save it in a more modern format?

I want to create HTML5 versions of some classic Atari 2600 games and was wondering if there's any possible way to rip all sound effects from a game's ROM file. Until now, I've tried using Stella ...
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4answers
4k views

What's with the Atari 2600 colors on SECAM?

On this picture below you can see that the Atari 2600 graphics are rather colourful, and some games like Pitfall! I think use the many shades of each colour and have rather good graphics for the 2600. ...
14
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3answers
862 views

What is the history of DE-9 joystick ports?

The Commodore 64 and the Atari 2600 had compatible joystick ports. Commodore, Atari, and third-party companies like Wico made joysticks supporting that standard. Did this standard have a name? ...
10
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1answer
530 views

Recommendations for high quality cheap RF demodulator

Does anyone have recommendations for a specific inexpensive RF demodulator that's higher quality than your standard VCR (and maybe a little bit smaller)? Like any old equipment floating around that ...
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3answers
295 views

Is it possible to bend tension back into atari 2600 joystick contact domes?

So I got these two ataris, just got them working. I was testing out the controllers and most of them have problems with the joystick not reacting. I opened them up, cleaned them, still have the ...
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1answer
1k views

Atari 2600 has no sound, no video. Any advice?

I have 2 Atari 2600s. I got them both at a garage sale. I plugged them both in with a coaxial adapter. No sound, no video. I opened them up, didn't see any shorts, the boards looked good. There ...
10
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2answers
780 views

Atari 2600 high voltage output

I've never worked on a Atari 2600 before. The first time I did, I wasn't getting anything on my old box TV. Not being able to do much at the time, I decided to check the voltage. The output voltage is ...
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1answer
1k views

Atari 2600 shows no signs of life when power is applied?

I have an Atari 2600 that does not appear turn on at all. I bought it from some guy in a garage sale. I believe he said it stopped working after a storm. I bought a new power supply in case the ...
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1answer
336 views

Atari 2600 paddle controllers slow, jittery

I recently picked up a pair of Atari 2600 paddle controllers for use with my Atari Flashback 6. The Amazon store said in the product description that they had been "tested." However, they are barely ...