Very good points... --James Bright www.QuarterArcade.com Restored Arcade Games for your Home ----- Original Message ----- From: "Paul Swan" <pswan@lsil.com> To: <techtoolslist@www.flippers.com> Sent: Tuesday, April 01, 2003 3:55 PM Subject: Re: Chip clip adapter for 9000
Hi James,
Working or not, I always cut out soldered CPU's and toss them. They are cheap and easy to get so I don't really care that much.
Clip over and...
1) ...you'll need to make sure the 20 year old CPU pins are clean to get a good contact.
2) ...you may have to cut tracks/lift pins/set jumpers etc. to make sure CPU is WHOLLY disabled. Some CPU's cannot be wholly disabled (all pins floating).
3) ...if you get a bus fault you may have to pull the CPU anyway.
4) ...you have twice the capacitive & resistive load on all the CPU pins, particularly clock pins, and are hoping the original design was a good one :-)
Is all this added uncertainty worth 10 mins with pin cutters and a nice new socket with a nice new known good CPU in it?
Regards,
Paul.
James Bright wrote:
Are the clip adapters for the 9000 series pods still around? If I remember correctly, Gottlieb soldered in the CPUs in the sys80 CPU boards. I'm going to start working on some in the next few weeks. Just wondering how hard they are to find and if people have used them with any success. I suppose I could desolder the CPU, but if it's working, I'd rather not.
JB
--James Bright www.QuarterArcade.com Restored Arcade Games for your Home