Progress has been slow, because I have been otherwise occupied for quite some time.  Slow, but not entirely still. Since turning Loper OS into an ab initio CPU architecture project, I have been using Xilinx development boards for prototyping.  For the past year —  an ML-501.  The FPGA toolchain itself is (grudgingly) Linux-friendly, but those […]

Let’s take another look at the console. There are several boards inside, but this is the only one which deals in custom Symbolics protocols (as opposed to the widely-known intricacies of operating a black-and-white CRT.) The rough annotations are my own. Click on the pictures for super-size (~10MB!) images. Once again, the Phase Encoded Video […]

The machine does indeed power up and run: But this is not enough. The console is a museum piece. While a Lisp Machine circa 1986 might last for a reasonably long time between repairs, a CRT of the same vintage likely will not. Moreover, it is a pain to have around, even if it were […]