HP 1826-1388 Network interface chip

I'm currently looking at the HP50962 SRM Coax interface PCB. This is a (custom) netowork card for HP9000/200 copmputers. I can't indentify one the the ICs, which basically links to the Coax netowrk cable. It's made by AMD (big AMD logo on it), and carries the HP house number 1826-1388, which I can't find anywhere. It's a 24 pin ceramic DIL package, and I've identified some of the pins : 1 - to ground trhough a resistor (maybe soemthing like Rx gain set) 3 - ground 4,5 - to a pulse transformer, the other side of which goes to the coax connector. Rx inout? 6,7 - ground 8 - Clock input 11 - Rx Clock output 13 - Rx Data output 15 - Tx Clock (output??) 17 - Tx Enable/ 18 - Tx Data 19,20,21 - +5V 22,23 - To 4,5 via low-value resistors (and thus to the pulse transformer). Tx Out? Looking down lists of ICs, I wonder if it's related to the AM7960 or AM7961, but I can't find data on those anywhere. So : 1) Does anyone have the data sheets on those ICs on-line anywhere? (As ever, please don't send pdfs or other large files to me here, but if you have said data sheet as a pdf, I can tell you how to get it to me). 2) Any other ideas as to what that chip might be. Thanks in advance -tony