BZ Problem

[virtvic]

As stated, I got a problem with my Battlezone PCB.
The machine was working ok after prodding the top ic on the top board (I'll get the exact location when I get home)
The socket was knackered, so I have replaced it - now the game doesn't come on at all. No screen, no sounds. Test mode comes on ok and reports an 'L' on the rh side. I presume the chip I mentioned is actually faulty and probably wasn't the socket that was the problem?
If so, could someone on here provide me with another?

 

[DanP]

Going from memory (I don't have a manual to hand) the "L" indicates a mathbox "low" failure. First thing to check is the interboard connector and connector pins (if you haven't already reflowed them). If it's not that then it's likely one of the 40 pin IC's you've indicated. I can't remember if they are just 2901 ALU's or wether they are something else, will check manual later...

Dan

 

[dezbaz]

Good luck with the problem, just wanted to get on-board, as i have a similar problem on mine

 

[virtvic]

I already reflowed the interconnect pins when I got it (it being a common problem) I have also checked the continuity of the header pins and they all seem fine.

When I prodded and poked the aforementioned chip it started to work correctly and when it started to fail again, another poke got it working, so oI suspect a chip failure...

Where / who can I get another from? Do they need to be programmed or are they a standard chip?

The machine is in quite a decent shape apart from the board fault and I will be selling / trading it soon.

edit - cheers for the quick replies, chaps.
virtvic2011-11-04 10:46:53

 

[dezbaz]

That's a 6502 chip I think

It's not programmed I think

 

[dezbaz]

Not sure if bulgaria appeals to you
http://www.ebay.com/itm/CM630P-Processor-CPU-SY6502-MPS6502-R6502-6502-clone-IC-/250844796145?pt=LH_DefaultDomain_0&hash=item3a6783d4f1

good price

 

[DanP]

Don't think it's the 6502. I think Vic is referring to the 40 pin IC's on the upper board (the mathbox), not the one on the bigger Vector Generator board. From memory it has 4 ALU's and 2 pokeys.

Dan

 

[virtvic]

It's the very top one - I think it's an ALU...

 

[dezbaz]

Ah, sorry

I am not home, going from aging memory

 

[virtvic]

Bump for someone supplying me with a replacement chip?

 

[Equites]

Have Pokeys but not ALU's.

 

[DanP]

Bump for someone supplying me with a replacement chip? 

Sorry don't have any but they're not exactly rare, you should be able to find em at the usual places or eBay. Might be worth swapping them around, see if the error code changes, I think it might go to "H" in one of the other positions.

Hth

Dan

 

[virtvic]

cheers - will try tomorrow. At least that'll determine that it IS that chip that is boogered.

Usual places? Do the major component stockists sell these or should I be looking to Bob Roberts?