The 'card' itself is about 10" long and 6.5" wide although there is a backplate of some sort which extends a good deal longer, and evokes the mental image of some sort of rack-mounted device. The card also has a metal guide-rail/support bar running along the length of one side.
On the (assumed) rear, a 36-pin centronics style connector.
On the opposite end, a 20-pin keyed connector
On the (upper?) edge, two connectors which are shaped sort of like PCMCIA slots but have 60 pins
Now for the board itself: 4 side by side 20-pin headers labeled RAM1-RAM4 4 unlabeled 20-pin headers with pin 1 removed 1 64-pin header with 3 pins removed 1 60-pin header with 1 pin removed
1 Motorola MC68000 1 QFP-84 TI chip marked 2559836-001 CF61847FN N 56032 9015 1 QFP-132 TI chip marked 2559878-0001 CF62258APQ W18005 9017 1 50MHz oscillator 1 3.6864 oscillator
at U1, DIP 32 chip marked 2559855-001 TI(c)1990 JAPAN 9019D
at U2, DIP 32 chip marked 2559856-001 TI(c)1990
The U2-H and U1-L markings make me think they are high/low bytes accordingly.
at U31, DIP 32 socketed chip marked 2559854-0004 TI(c)1991 SHARP JAPAN 9134 D
at U28, DIP 32 socketed chip marked 2559853-0004 TI(c)1992 SHARP JAPAN 9134 D
The U31-H and U28-L markings, cause me to think a high/low pair as well.
Only distinguishing markings on the PCB itself are screened text: INTERFACE CONTROL UNIT COMMUNICATION BOARD and on the back on a paper label 2559801-001 AR-Y/ABSR-C 4026-0217 R115
and, some pictures http://users.adelphia.net/~vartan/card1.jpg http://users.adelphia.net/~vartan/card2.jpg http://users.adelphia.net/~vartan/card3.jpg
Well, perhaps this mystery will be solved, I have had this card for something like 5 years now and am still as curious as ever.
-- Author: vartan INET: [EMAIL PROTECTED]
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