Strange PCBs found at hamfest - GPIB?

Hi all, I've just come back from the hamfest with yet more junk. Besides the large quantity of LEDs, LCD displays and magazines, I picked up a set of PCBs. Two of them are marked 'IHR "CSG" 1B' - these are fitted with four TIL311s each, as well as loads of 74LS logic ICs, circa 1981. There's also an IDC connector and some form of power connector. Next up is a 10-key keyboard - complete with 74C922 keyboard controller IC. This one bears the text 'keyboard (0-9) JRT'. A nice addition to my junk box :) Finally, I've got two boards with Fairchild (?) "96LS488DC 8128 USA" ICs fitted. One of them consists solely of a pair of IDC connectors, a power conector, a PAL12H6C (Monolithic Memories - there's a name I haven't heard for a while), an 8-way dipswitch and a pair of 74LS chips. This board is marked "IHR GPIB ADAPTER / MRC INSTITUTE OF HEARING RESEARCH". The last board has the same Fairchild chip (ceramic with brass cover) as the other board, but with four IDC connectors, loads of 74LS logic chips, three power connectors and a 5-way DIP switch. The board is marked "MRC IHR Controller / (C) MRC 1982". Can someone tell me what the 96LS488DC is? From what I can tell, it's a GPIB controller, whatever GPIB is. I'm still after a datasheet - nothing on Google besides a Chipdir listing. Sorry if this is off-topic - these boards seem to have come out of a computer of some form and I would like to know if any listmembers have heard of or seen anything similar. As far as the ten-year-rule goes, I think I'm well within the cutoff limit - these boards all carry dates of 1983 or earlier. Later. -- Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, philpem(a)dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62), http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext ... Batteries not included.