The BCC Interface MK II is a replacement for the earlier MK I version,
and can support the existing protocol as well as the multiplexed address/data
protocol as described here. The main advantage of this protocol is that
it requires fewer wires to implement (26 in all), and is capable of greater
data rate, however these advantages are offset by the need for more "intelligence"
at the far end.
The AT correlator "External bus interface" is designed to interface to an 80x86 mother board's 8/16 bit ISA bus. The external bus provides addressing for 32K by 16-bit words of memory and six specific purpose 16-bit registers. The external bus consists of a non-multiplexed, 50 pin header, containing...