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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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 Posted: Tue May 01, 2012 11:06 pm Post subject: ceramic hard drive board chips |
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I was wondering if people had any knowledge of what 40-pin chips were used on early hard drive PCBs, especially ceramic ones
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Robev
Joined: 10 Mar 2006
Posts: 3693
Location: New Zealand
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| Posted: Wed May 02, 2012 1:44 am Post subject: Re: ceramic hard drive board chips |
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| Neon_WA wrote: | | I was wondering if people had any knowledge of what 40-pin chips were used on early hard drive PCBs, especially ceramic ones |
Are we talking 8" or 5&1/4"?
I have some early hard drives so I can have a look and let you Know if you wish
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Elar
Joined: 16 Jul 2003
Posts: 746
Location: Tallinn, Estonia
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| Posted: Wed May 02, 2012 1:48 am Post subject: |
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| I remember seeing ceramic 8048/9 on 3,5" Miniscribe MFM drives. Maybe even 8748/9. |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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Robev
Joined: 10 Mar 2006
Posts: 3693
Location: New Zealand
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| Posted: Wed May 02, 2012 2:02 am Post subject: |
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Looks like a mix of both sizes
Might be a Fujitsu 8089 on it
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Wed May 02, 2012 2:06 am Post subject: |
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no ground strap it appears and has a GOLD cap.. so got me wondering
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UMMR
Joined: 23 Aug 2007
Posts: 381
Location: Udine, ITALY
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| Posted: Wed May 02, 2012 2:38 am Post subject: |
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Hi,
Motorola 68705 in mid-80s 5.25'' 40 and 80 MB Miniscribe ESDI HDDs.
NEC D7809 in NEC D51xx and D53xx.
Various PGA gate arrays in Fujitsu 5.25'' drives.
Hitachi gate arrays in Hitachi (sorry... obvious...) old SCSI drives.
Toshiba gate arrays in old 5.25'' SCSI Quantums.
You can find the 8748 in several IBM MFM disks (061, 062, 063).
This is for the ceramic chips only.
Generally speaking I have seen a lot of different MCUs, ranging from the ubiquitous Intel 8048 to the Motorola 68000 (yes, in Fujitsu high end SCSI drives) and the 80188 (IBM SCSI). Some of the old-school 5.25'' drives have 2 or even 3 MCUs onboard: one for the servo control, one for the data channel and the third for the SCSI protocol processing (usually in pair with a SCSI controller like the WD33C93).
Paolo
Last edited by UMMR on Wed May 02, 2012 2:45 am; edited 1 time in total |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Wed May 02, 2012 2:44 am Post subject: |
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those are the sort of things I would expect.. but the package of this one has me stumped to what it would be
not what I would expect on a hard-drive PCB
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UMMR
Joined: 23 Aug 2007
Posts: 381
Location: Udine, ITALY
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| Posted: Wed May 02, 2012 2:48 am Post subject: |
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| Robev wrote: |
Looks like a mix of both sizes
Might be a Fujitsu 8089 on it |
In the object's picture I see a NEC hard drive controller board on the right and a Micropolis board on the left. In the middle there is a card that looks like a Fujitsu controller. Almost all those cards are HDD PCBs. |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Wed May 02, 2012 2:51 am Post subject: |
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was a mystery buy for me.. as the boards interested me
so its on its way to Gennas.. so we will see in a few days time
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Robev
Joined: 10 Mar 2006
Posts: 3693
Location: New Zealand
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| Posted: Wed May 02, 2012 2:57 am Post subject: |
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I just went out to my garage where I have about 100 5 1/4" drives, full height, half height etc but I don't really feel like taking the cards off them to see as a lot of them have the chips on the undersides of the boards, so sorry cannot help you with this one.
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