No NVRAM on non-deluxe Asteroids. The 2114 is the number / name of the type of RAM used.
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Use flush cutters to snip the legs, and then tweezers or bulb to pull out the remains. The objective is to not hurt the PCB first, and secondarily to remove the chip. Then inspect around the holes and remove any stray solder. Then solder in a dual wipe socket. Then you can insert a new 2114 RAM chip from twistywrist or arcadechips or Bob Roberts.
does the 2114 have .3 spacing in the legs?
ok thanks a bunch.Yes. If you are ordering from Bob you can just buy the 2114 and say 'plus socket' and he'll send the right one. If I were you I'd order a few because the Asteroids manual claims that self-test stops at the first failing chip (so after you fix it you may find you get an error beep on a subsequent one). I think there are a total of six for Asteroids.
Whatever it is it affects game play but unlikely to register as a RAM error. Fix that first.
You're going to need a logic probe, and to start probing.
I would first check the LS161 counters at B7, C7, and D7. Specifically, check pin 15 on each chip. If any of these aren't toggling, replace that LS161.
The daughterboard is a speed mod board. I have one just like it, with the 4 chips and 4 colored wires.
If you want, you can remove the board, desolder the wires (making note of which ones go where, in case you want to reinstall it in the future), then replace C5 with an LS161. That should put the board back to stock condition, however I wouldn't think it's likely to be the cause of your issue, as glitches like that are usually due to problems late in the vector chain, rather than the clock circuit, which is what that daughterboard modifies.
Can't hurt to try removing it though. My guess is it will make no change, but you never know.
You're going to need a logic probe, and to start probing.
I would first check the LS161 counters at B7, C7, and D7. Specifically, check pin 15 on each chip. If any of these aren't toggling, replace that LS161.