Can someone burn a few 720 chips for me?

Reddogg

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I picked up 2 non-working video pcbs recently that have a total of 3 chips with missing/broken legs. I was wondering if someone could burn them for me. I can provide blank chips if necessary, and of course some $$ for the work. Again, they are off of the video pcb, and I need 2 of chip 1114, and 1 of chip 1109. They are 27512s. I would like it if someone with a 720 could burn them and verify that they work, as opposed to someone burning the MAME roms and thinking that they will work.

I know burners aren't too expensive, but burning isn't something I really do, so I don't want to spend that $$ if I don't have to.

Please PM me if you can do this and how much $$ you would want to do it.

Thanks.
 
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I'd recommend hobbyroms.com... you should have no reason to think roms from MAME wouldn't work (they usually do, and were from someone's board originally, so the chance that someone who reads their own, burns you a set and verifies they work in the board they were copied from is just as likely to end up not working for you (which is not very likely)

That being said, if time is not important to you i'd be happy to burn them for you next time i have the machine pulled out and boards accessible (and ideally when i test my extra boardset) but i dont really want to pull the machine (and roms) out just for that, sorry

Edit: if they happen to be good besides the broken legs you might be able to stack it in a new socket and make it work (or solder jumpers to the leg if any is exposed)
 
I'd recommend hobbyroms.com... you should have no reason to think roms from MAME wouldn't work (they usually do, and were from someone's board originally, so the chance that someone who reads their own, burns you a set and verifies they work in the board they were copied from is just as likely to end up not working for you (which is not very likely)

That being said, if time is not important to you i'd be happy to burn them for you next time i have the machine pulled out and boards accessible (and ideally when i test my extra boardset) but i dont really want to pull the machine (and roms) out just for that, sorry

Edit: if they happen to be good besides the broken legs you might be able to stack it in a new socket and make it work (or solder jumpers to the leg if any is exposed)

No problem, I understand.

Agreed, the MAME roms should work as they are dumps from the actual chips.

My main point was that I would like them tested in the actual boards, and not just assumed to be working. I do have 2 complete working board sets (cpu and video), so I will be testing them in perfectly good boards, and I'm trying to avoid someone telling me they should work, and then suggesting that the 2 other video boards must be bad, and not the chips.

Unfortunately, there isn't much leg left on any of the 3 chips. I did try the scrape a little bit of the chip away and then solder a wire to it method, but couldn't get it to work.

Thank you for your offer!

I'm not in a huge rush since I do have working ones already. I'll post if/when I do get them burned. If you pull yours before that happens, I'd be happy to take you up on that.

Thank you.
 
Why would you think they would not work once they've been burned? I don't know about others but my burner does a verify function after it burns them and i would imagine all burning software would so that. it Is much more likely that if Roms don't work that either you data, address or memory decoding circuits are broken on the board as there are quite a few logic chips and buffers in any memory circuit.. Rom chips are extremely simplistic. Compared to the backed circuitry.

Brian
 
Why would you think they would not work once they've been burned? I don't know about others but my burner does a verify function after it burns them and i would imagine all burning software would so that. it Is much more likely that if Roms don't work that either you data, address or memory decoding circuits are broken on the board as there are quite a few logic chips and buffers in any memory circuit.. Rom chips are extremely simplistic. Compared to the backed circuitry.

Brian

Why is it a problem that I want them confirmed working?

Also, see above post.
 
No problem... I'll check back here next time its out...

To be honest yeah its a little weird... mainly because the risk factor of someone breaking their own legs which have to be verified working, just to test roms for another board (that can always be reburnt if by chance they didnt work) is very high

Also the likelyhood that someone who burns ROMs as a pay service also has a working 720 boardset and cabinet or at least med res monitor to test with seems very low
 
Not a problem ..it's your board and money you have every right to get stuff tested.

Was just pointing out in case you did not know that the potential of you getting bad Roms is almost 0 (and I am a super super paranoid engineer who assumes no sub system will ever be working properly) since a lot of people seem to think Roms are problematic and often waste a lot of time and money jumping through hoops to try to ensure that there Roms are good.

But by all means sounds like you are well aware of what you doing and have every right to want to have someone test them in there machine before sending them.

Anyway I hope you find someone to do that for you.
 
Steph at Hobbyroms is in Canada.....just pay the $20 and get the chips.
Think of it like a scratch ticket with a 99.99999999999999% of being a winner.

That's 2 mentions for him now. I must check him out, sounds like a great deal.

Thanks to both of you for the heads up!
 
Just something to note: Just like any connector, there is a limited number of insertion/removal cycles sockets can endure - Asking someone to do that (for me anyway) is asking for them to put the well-being of thier board in jeopardy.

Just my opinion :)
 
Chips ordered from Steph @ hobbyroms.com.

Fantastic that there's a service like this available for those who need it.

Cheers Steph!

...And for anyone wondering why I'm cool with Steph's rom service, when I wasn't in favor of MAME rom burns at first, is because like most people I do feel safer when there is an actual business doing it, website and all, as opposed to someone who just says they will work. Also, some of you have raised valid points about bending legs when pulling chips (though I haven't bent any legs in a couple of years, I've got my technique down pretty good I'd say), as well as the insertion removal cycles.

Thanks guys!
 
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