Tempest spinner quit

[andrewb]

Great, thanks for the link and I'll check it out.

Happen to know where one could purchase some Atari Tempest custom chips? I acquired several pcbs missing several things also * I'd like to do the best upgrades as well, including Tubes and Breakout(I heard).

Thanks again

What chips? Tempest doesn't have customs like other Atari boards do.

 

[FlashbaxArcade]

What chips? Tempest doesn't have customs like other Atari boards do.

I assumed these with the Atari stamps....I'm missing several of these on my boardsets! As well as other chips

 

[andrewb]

The 24-pin ones are just roms. You can program new 2716's with any rom burner.

The 40-pin tan ones are 2901 bitslicer chips. Easy to find. The two darker ones at the end are Pokey chips. Those are getting trickier to find but are still around.

The 8-pin ones are bipolar PROMs. Most burners can't program them. Contact Steph at hobbyroms.com.

 

[FlashbaxArcade]

The 24-pin ones are just roms. You can program new 2716's with any rom burner.

The 40-pin tan ones are 2901 bitslicer chips. Easy to find. The two darker ones at the end are Pokey chips. Those are getting trickier to find but are still around.

The 8-pin ones are bipolar PROMs. Most burners can't program them. Contact Steph at hobbyroms.com.

Good to know, just saw "Atari" stamp and assumed. Thanks sir

Was reading the start of your 6100 post and unplugged monitor to test Tempest "playing blind". The DC was about 2-3v and AC 5v on XOUT/YOUT(both kinda high) so I guess I have a board analog prob on this boardset

 

[andrewb]

No. Tempest runs a little higher than other boards, on the Y DC. It will drift up to around 3.5v during the scrolling TEMPEST logo. But it should be closer to zero otherwise. You can also adjust it as needed with the Y Center pot on the game board.

 

[DarkKobold]

For the record / future search...

You can swap the two POKEY (C012294B-01) on the Tempest AUX PCB located at B/C2 and C/D2 to see if the problem follows the chip change. If your Tempest spinner is not working, swapping the POKEY should leave you with a working spinner but a non-functional fire/zap button combo. The same goes for sounds. A swap should yield different sounds working and working sounds missing if one of the POKEY has failed.

On a Tempest UR the POKEY are responsible for the spinner, start p1, start p2, fire and superzap as well as audio. With a cocktail you add the second fire 2, superzap 2 and spinner.


POKEY B/C2 (#1)
------------------
Spinner 1
Spinner 2 (cocktail)
Audio Out


POKEY C/D2 (#2)
------------------
Start 1
Start 2
Fire 1
Fire 2 (cocktail)
Superzap 1
Superzap 2 (cocktail)
Audio Out

16 years later, this got my Tempest spinner working.