> The only interfaces seem to be serial lines.
What there is now is basically a KL11 type serial controller - the simplest version
of a rs232 controller, without the option to set baud rates, byte lengths, parity, without
modem control, and without any error detection capability. ie. What you would connect a
terminal or hardcopy console to.
> I take it that any DEC peripheral that is
connected via a serial line could
> possibly be supported.
More specifically: any device connected to a KL11 - or
whatever variant of that that would be accepted by the software that interfaces to the
controller.
> Other than the serial lines are there any plans to
produce an interface to
> any of the standard DEC PDP-11 busses ie Uni and Q22?
If you mean, do I have
any plans to make it possible to connect original "real" Uni/Q controller boards
to the FPGA? No, I don't - firstly, because I don't have any of those boards;
secondly, because it would likely be more appropriate to recreate the functionality in
VHDL as well. And maybe easier - because, interfacing would mean that the timing and
electrical behavior of a 'real' Uni/Q bus would have to work with the timing and
electrics of the 'logical' bus inside the FPGA. That would not be a trivial
challenge.
> An Ethernet port (co-ax or UTP) would be nice.
I agree :-)
I do have some thoughts on adding one of the Ethernet controllers, but that is a
nontrivial job - it will probably take me at least a couple of months to get it working.
And, unlike RS232 ports, Ethernet hardware differs across FPGA boards - some have a phy,
some have a complete controller including dma to memory, some have wire/transformer only,
most have nothing at all. So there too is a bit of a challenge - which situation to build
the VHDL for?