24 Apr
2013
24 Apr
'13
8:20 p.m.
I have the Nexys-2 which I got from Farnell, who I
believe trade as
Element14 in the US, but buying direct from Digilent looks OK. If you
can find a tame student you may also be able to get one at an
academic discount.
I have bought a number of FPGA boards from Digilent for work and play
and I can recommend them.
I did a PDP-8 FPGA design for the Nexys 2 (and others).
See http://opencores.org/project,pdp8
A minimal PDP-8 system that will boot OS/8 requires the Nexys 2 board
(1200K gate version), a Secure Digital (SD) Card PMOD card, and an
generic SD card for the disk drives. The 500K gate version of the Nexys2
board does not have enough memory on chip to support the full PDP-8 memory.
This will give you a PDP-8/E or PDP-8/A CPU (selectable), KM8E Extended
Memory (32K), KE8 Extended Arithmetic Element (EAE), KM8E time sharing,
real time clock, a KL8E console, a RK8E disk controller and 4x RK05
disk drives.
Rob.