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Author Topic: Amiga Custom Chips and mystery components  (Read 3404 times)

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Offline Brian

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Re: Amiga Custom Chips and mystery components
« on: February 25, 2007, 05:56:29 AM »
Ehm... Some are pritty easy:


Mystery components page 1
1=Crystal of unknown Mhz
2=Crystal of 64Mhz
3=Empty 48pin socket (not 40pin Kickstart)

Mystery components page 2
1,2,4,5,7,8= Damaged memory chip
3,6= 70ns Memory chip suitable for A3000 (need at least 4 at a time)
9=Crystal of 75Mhz
10=Probably 1 of 3 chips used to passivly terminate a SCSI drive on the drive itself.

Offline Brian

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Re: Amiga Custom Chips and mystery components
« Reply #1 on: February 25, 2007, 08:49:01 AM »
There are legs missing from the chips I described as "damaged". If a leg is missing it's ready for the scrapper (unless some of the old pin is still available cause then there might be a chanse of soldering on a new leg to what's left of the old one... doesn't look to be possible on these chips though).

Offline Brian

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Re: Amiga Custom Chips and mystery components
« Reply #2 on: February 25, 2007, 08:57:38 AM »
With 3 of them on the drive itself it can be terminated so no extra terminator is needed on the SCSI cable.

Most external cases have a passthrough for further SCSI devices and requiers an external terminator on this passthrough connector. Once in a while you find a SCSI case that doesn't sport this feature and then the internal device need to be terminated either on the device itself or on the SCSI cable inside.

Due to this I don't think you need to worry about shipping the 3 resistor packs... store them for your own internal SCSI needs. :)