Jack Rubin sent me this picture of his DE0 board running RT11 in front of a real PDP11/70. Taken during the VCF East 8.0, which took place last weekend. It’s something of a classic ‘old meets new’ picture – there being something like 40 years of age difference in it. Would have liked to be there and see it for real – but it’s on the other side of the ocean from where I live. Still makes me proud to see my work on display. Thanks Jack!
Over the last weeks, I’ve been working on an Ethernet interface for the PDP – a DEUNA, to be more exact. And it’s basically only the implementation of the controller; the real Ethernet stuff is implemented in a tiny Michrochip ENC624J600 device that I interface via SPI. The DEUNA is working a bit already, but there is still a major bug in it – it appears to cause memory corruption. I’ve been able to do some pings to a board running BSD2.11, and even telnetted to it a couple of times, but it tends to crash often. I expect that there is a bug in the bus master logic, and that will take me some time to find. Especially since the summer is here, and it’s time to go outside and spend time on outdoor projects.