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computers / comp.sys.ibm.ps2.hardware / Re: Adaptect AHA-1640 @0000.adf error

SubjectAuthor
* Adaptect AHA-1640 @0000.adf errorlharr...@gmail.com
`* Re: Adaptect AHA-1640 @0000.adf errorIBMMuseum
 `* Re: Adaptect AHA-1640 @0000.adf errorIBMMuseum
  `* Re: Adaptect AHA-1640 @0000.adf errorrichard smice
   `* Re: Adaptect AHA-1640 @0000.adf errorLouis Ohland
    `- Re: Adaptect AHA-1640 @0000.adf errorIBMMuseum

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Adaptect AHA-1640 @0000.adf error

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Subject: Adaptect AHA-1640 @0000.adf error
From: lharris...@gmail.com (lharr...@gmail.com)
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 by: lharr...@gmail.com - Wed, 12 Jul 2023 04:08 UTC

Does anyone know how the Adaptec AHA-1640 cards die with the @0000.adf error? I noticed one of the resistor packs had a crack in it, so I replaced it with no luck. Looking for other ideas. I've seen it mentioned before around the internet, here and on the Facebook group... but can't seem to find any decent discussion about it.

I've posted here and on Facebook. Any help would be greatly appreciated.

Re: Adaptect AHA-1640 @0000.adf error

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Subject: Re: Adaptect AHA-1640 @0000.adf error
From: ibmmus...@gmail.com (IBMMuseum)
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 by: IBMMuseum - Wed, 12 Jul 2023 05:29 UTC

> Does anyone know how the Adaptec AHA-1640 cards die with the @0000.adf error?

The Adaptec AHA-1640 uses a C&T 82C612 MCA interface chip - there is a link to the datasheet for the 82C611/82C612 on the AHA-1640 page. POS ID is set external to the chip, with two examples shown in the datasheet. We need to determine how that is implemented on the AHA-1640 (and a handful of other adapters that use the 82C612):

Logitech ScanMan Adapter, ID 6DACh
National Instruments MC-MIO-16, ID 5EDFh
Creative Labs Soundblaster MCV (non-Pro), ID 5084h

Several other adapters have a C&T marking on a PLCC-68 package, but I don't know if those would be the 82C611 or 82C612 (but both do the POS ID in the same/similar way)...

Re: Adaptect AHA-1640 @0000.adf error

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Subject: Re: Adaptect AHA-1640 @0000.adf error
From: ibmmus...@gmail.com (IBMMuseum)
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 by: IBMMuseum - Thu, 13 Jul 2023 17:22 UTC

> > Does anyone know how the Adaptec AHA-1640 cards die with the @0000.adf error?

I'm actually thinking that the "Device not ready" logic as shown on Page 15 physical is getting confused - More study of this mechanism is needed.

Re: Adaptect AHA-1640 @0000.adf error

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Subject: Re: Adaptect AHA-1640 @0000.adf error
From: dmsm...@gmail.com (richard smice)
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 by: richard smice - Thu, 13 Jul 2023 19:39 UTC

On Thursday, July 13, 2023 at 1:22:09 PM UTC-4, IBMMuseum wrote:
> > > Does anyone know how the Adaptec AHA-1640 cards die with the @0000.adf error?
> I'm actually thinking that the "Device not ready" logic as shown on Page 15 physical is getting confused - More study of this mechanism is needed.

I have had Future domain cards fail in a similar fashion...... I inserted reprogrammed e-proms in and every thing played fine...

Re: Adaptect AHA-1640 @0000.adf error

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From: ohl...@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: Adaptect AHA-1640 @0000.adf error
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 by: Louis Ohland - Thu, 13 Jul 2023 22:12 UTC

Interesting. POSIDs are implemented with logic gates or something
SIMMple and fast. No need to query an EPROM.

richard smice wrote:
> On Thursday, July 13, 2023 at 1:22:09 PM UTC-4, IBMMuseum wrote:
>>>> Does anyone know how the Adaptec AHA-1640 cards die with the @0000.adf error?
>> I'm actually thinking that the "Device not ready" logic as shown on Page 15 physical is getting confused - More study of this mechanism is needed.
>
>
> I have had Future domain cards fail in a similar fashion...... I inserted reprogrammed e-proms in and every thing played fine...
>

Re: Adaptect AHA-1640 @0000.adf error

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Subject: Re: Adaptect AHA-1640 @0000.adf error
From: ibmmus...@gmail.com (IBMMuseum)
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 by: IBMMuseum - Fri, 14 Jul 2023 00:10 UTC

>> I have had Future domain cards fail in a similar fashion...... I
>> inserted reprogrammed e-proms in and every thing played fine...

The Future Domain SCSI adapters don't use the 82C611/82C612 chipset, which has an external mechanism for passing the POD ID of the adapter (several adapters use these microchannel interface chips) and have a "Device not ready" ('0000') mechanism for the system if the adapter fails. The error is repeatable with the Adaptec AHA-1640 implementation; Lionel and I each have one adapter affected this way.

The ROM of the Future Domain SCSI adapters is to boot from an attached hard drive; They can be used ROM-less with a SCSI CD-ROM, for instance. The AHA-1640, on the other hand, has a ROM BIOS extension ('U6'), microcode ROM ('U5'), and three socketed PALs. It i unknown right now where the POS ID logic is on the AHA-1640 adapter, or how it is implemented. All socketed chips (ROMs and PALs) on the AHA-1640 are required.

Once I have an opportunity, I'm going to start switching PALs from a known-good AHA-1640, and also might try the microcode ROM (POS ID logic likely won't be in the ROM BIOS extension chip)...

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