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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Splurge on August 04, 2008, 11:26:49 PM

Title: A3000 SCSI Replacement Chip
Post by: Splurge on August 04, 2008, 11:26:49 PM

Restoring my A3000 and like to finally get rid of the PROTO WD33C93 chip.  Found this one on eBay (http://cgi.ebay.com/WD33C93-PL-WD33C93-33C93-WESTERN-DIGITAL-IC-NEW_W0QQitemZ310049231853QQihZ021QQcategoryZ4663QQrdZ1QQssPageNameZWD1VQQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247)

Will this do the trick?  I have already scavenged my local PC junk stores and cant find any 33C93 based SCSI boards.  Or if anyone knows a cheaper place to find one, I was only able to find one $1 cheaper w/ $50 minimum order...

Title: Re: A3000 SCSI Replacement Chip
Post by: rkauer on August 05, 2008, 03:59:26 AM

 The "PROTO" label means nothing, but if you really want a chip without the label, go for it.

Title: Re: A3000 SCSI Replacement Chip
Post by: Splurge on August 05, 2008, 04:07:53 AM

Oh, I thought these PROTO chips contained bugs and rev.8 models fixed some issues.

Title: Re: A3000 SCSI Replacement Chip
Post by: adolescent on August 05, 2008, 04:10:01 AM

Yeah, that's an old 02 chip, probably as old (or older) than what's in your A3000 now.

Title: Re: A3000 SCSI Replacement Chip
Post by: Splurge on August 05, 2008, 04:16:17 AM

I feel dumb now...  Wasn't certain what the revision number was on that chip.  Thanks for clarifying for me.

Title: Re: A3000 SCSI Replacement Chip
Post by: adolescent on August 05, 2008, 04:23:35 AM

The one you want should say -08 (although, it may still say PROTO-08 it's still good).

Title: Re: A3000 SCSI Replacement Chip
Post by: miles on August 05, 2008, 07:43:35 AM

If the SCSI on your 3000 works without problem it's a waste of $ upgrading to a 08.  I upgraded my 04 to a 08 and had SCSI errors so went back to the older chip. Problems with the old SCSI chip normaly show up with removeable media.

Title: Re: A3000 SCSI Replacement Chip
Post by: dannyp1 on August 05, 2008, 11:35:58 PM

I wouldn't give up my 08 chip.  In my opinion it is the most useful of the upgrade chips.  I would go back to the Buster 09 from the 11 before I would give up the SCSI 08.  I have never heard of anyone before having more problems with the newer 08 chip.  I would give up the newer DMAC & Ramsey chips before I would the newer SCSI!  JMHO

Dan

Title: Re: A3000 SCSI Replacement Chip
Post by: Splurge on August 06, 2008, 12:57:52 AM

How about your first born ;-)?

You make a convincing post.  Now, find me two of them :crazy:

Title: Re: A3000 SCSI Replacement Chip
Post by: da9000 on August 12, 2008, 09:55:09 PM

miles and rkauer are right.

They're impossible to find unfortunately.

Title: Re: A3000 SCSI Replacement Chip
Post by: Splurge on August 13, 2008, 03:22:53 PM

The last one on eBay sold for over $60 US.  I'd rather buy a Buddha IDE card for that price and just leave a single drive on the scsi chain.

Title: Re: A3000 SCSI Replacement Chip
Post by: tonyyeb on August 13, 2008, 03:42:41 PM

Buddha IDE card is £37inc VAT in the UK from Amigakit. Trying to get the US price and a link for you but the site looks like it is having issues at the moment.

Title: Re: A3000 SCSI Replacement Chip
Post by: adolescent on August 13, 2008, 04:07:09 PM

What problems are you having with the old SCSI chip?  

When I ran my BBS I had 2 internal HDs, 4 external HDs, and a 7 CD changer, all with the 04 SCSI chip.  The only real problem I had were sometimes I'd need to power things on in a specific sequence.

Title: Re: A3000 SCSI Replacement Chip
Post by: Splurge on August 13, 2008, 04:14:43 PM

My main problems are cdrom drives.  I have tried the few I have on my 3000 and the disk usually will be unreadable.  If I put the same drives on my TrumpCard Pro I have no problems at all.  So I just assumed that the 04 chip was the cause of the problems.

Title: Re: A3000 SCSI Replacement Chip
Post by: dannyp1 on August 13, 2008, 05:27:54 PM

You might want to try idefix97 from Aminet.  It helps with SCSI problems also.  I was having similar problems as you on one of my A2000's and nothing I did seemed to help.  Someone here on Amiga.org told me to try the idefix97 and I was thinking probably the same thing as you "I have a SCSI problem, not an ide problem".  Well it took care of my SCSI problem and I was sold on the program.  It's just an idea but it might work.

Dan

Title: Re: A3000 SCSI Replacement Chip
Post by: mohican on August 13, 2008, 10:02:12 PM

Hi,

I bought scsi chip from this seller without any problem!

http://cgi.ebay.de/SCSI-Chip-WD33C93A-PL-08-fuer-A3000-A2091-A590-CDTV_W0QQitemZ380054205011QQcmdZViewItem?hash=item380054205011&_trkparms=72%3A823|39%3A1|66%3A2|65%3A12&_trksid=p3286.c0.m14.l1318 (http://cgi.ebay.de/SCSI-Chip-WD33C93A-PL-08-fuer-A3000-A2091-A590-CDTV_W0QQitemZ380054205011QQcmdZViewItem?hash=item380054205011&_trkparms=72%3A823|39%3A1|66%3A2|65%3A12&_trksid=p3286.c0.m14.l1318)[/url]

or try it www.vesalia.de

regards, Mohican

Title: Re: A3000 SCSI Replacement Chip
Post by: miles on August 13, 2008, 10:16:31 PM

Could be the onboard scsi term on the motherboard or the diodes could be the wrong way round see my (in need of updating :-) ) homepages for details on the diode issue:


amiga3000 details (http://homepages.ihug.co.nz/~miles.j/amiga.html)

Title: Re: A3000 SCSI Replacement Chip
Post by: da9000 on August 14, 2008, 09:29:27 AM

Quote

adolescent wrote:
When I ran my BBS I had 2 internal HDs, 4 external HDs, and a 7 CD changer, all with the 04 SCSI chip.  The only real problem I had were sometimes I'd need to power things on in a specific sequence.

Hardcore. It's what I call: a power user! :-)


@Miles:
Do you recall which diodes were these?
Was the problem on any specific model or revision of the mobo?