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Robin4
April 30th, 2016, 06:35 PM
http://i63.tinypic.com/2ll0xhe.jpg

I have this card having around.. Dont know exactly what it is..

It also have an FCC ID: DC47E5AITC

Is there any more information about it?

krebizfan
April 30th, 2016, 06:55 PM
Looks like a hard disk controller for MFM/RLL/ESDI: all which have a 34-pin and two 10-pin connectors.

The big chip in the center suggests it was made in the late 80s or early 90s. Can't be much after that because Tallgrass exited the business.

SomeGuy
April 30th, 2016, 08:08 PM
There is no data connector for MFM/RLL.

Perhaps a proprietary interface for a tape drive?

If that is a rom in the socket in the upper right, perhaps dumping it would reveal some model information.

krebizfan
April 30th, 2016, 09:07 PM
The TG5525i is the only Tallgrass internal controller card I can find a picture of. It seems to have a similar set of connectors though all bunched sensibly near the bracket (because the card also has an external port).

Tallgrass had dual purpose GCR controllers for both tape and hard drives. Tis a strange system. May need special drivers.

AlexC
April 30th, 2016, 09:18 PM
There was one like this - this actual one? - on ebay recently, described as an 8-bit IDE card, i.e. for use in that brief period when XT (rather than AT) IDE hard drives were around. Not hugely useful unless you have one of those drives.

Ah, here it is: http://www.ebay.co.uk/itm/Tallgrass-Tech-ISA-8bit-Hard-Disk-Contoller-/111969595400

Stone
May 1st, 2016, 02:34 AM
Looks like a hard disk controller for MFM/RLL/ESDI: all which have a 34-pin and two 10-pin connectors.Those are 12 pin headers, not 10 pin. :-)

FWIW, MFM/RLL/ESDI do not have two 10 pin as you stated (or even 12 pin) connectors but rather two 20 pin connectors for the data ribbon cables.

bear
May 1st, 2016, 02:42 AM
Tallgrass is mostly known for cartridge tape systems for use with PC clones. Dollars to donuts that's what this card is about.

Chuck(G)
May 1st, 2016, 07:35 AM
Yup. In fact, if you look up the FCC ID, it's been reassigned to Exabyte (https://fccid.io/DC47E5AITC). Running down exactly what Exabyte purchased in 1993 turns out to be Tallgrass' QIC tape systems.

Robin4
May 1st, 2016, 08:22 AM
There is no data connector for MFM/RLL.

Perhaps a proprietary interface for a tape drive?

If that is a rom in the socket in the upper right, perhaps dumping it would reveal some model information.

I had checked the rom, but it seems it loss its contents.. So its blank after 30 years.

SomeGuy
May 1st, 2016, 09:52 AM
I had checked the rom, but it seems it loss its contents.. So its blank after 30 years.
More likely this ROM uses a different chip select or set of chip select pins than a common ROM/EPROM. You might need to consult the datasheet (but the picture is too blurry for me to see the part number) If there are multiple select lines they may be programmable, in which case you might need to experiment.

What happens if you just plop it in a PC? Does it map a BIOS anywhere in memory?

framer
May 1st, 2016, 01:48 PM
This is going back to 1987-1990, Tallgrass made a proprietary interface for a tape drive/harddrive combo. I owned one for an Art Gallery I had back then. I could save to the harddrive then do a daily backup of the HD to a proprietary tape cartridge. The unit was about a shoe box size case, I thinking it was a 20MB size but might have been up to a 40MB. It was a waste of $2K as it sucked and was thrown out in the early 90's.

But it could be cool to have it today... NOT...

framer

Chuck(G)
May 1st, 2016, 05:37 PM
Ampex made a similar rig, but the hard drive and tape were both SASI. I still have the interface board.