Added a notes file to store details of the attempts to bring up

the kernel.

build/Notes.md

@@ -0,0 +1,38 @@
+# Bringing up the Kernel
+
+Add notes on what you've tried w.r.t bringing up the kernel
+
+## wkt Sun Mar 13 12:26:06 AEST 2016
+
+We can make at the top level to assemble the kernel, some utilities
+and build the filesystem with the utilities, dd and system directories.
+
+In the build directory, make run starts Simh running, loads the
+kernel into memory and sets the PC to 0100.
+
+I'm sure that Phil has got further than this, but by setting a
+breakpoint at 01000 (set br 1000) and doiing a c(ontinue), we see:
+
+```
+simh> show cpu history
+...
+003351  1 000072  000000  JMP 3361
+003361  1 000072  000000  LAC 4257
+003362  1 000454  000000  JMP I 3272
+004544  1 000454  000000  JMP 10000
+```
+
+which is the end of coldboot in s8.s. The first few instructions
+are definitely from init.s. By breaking at 001115 (fork from a.lst),
+we can see two forks, which correspond to the two in init.s.
+
+We do get to the 010052: 020005     sys write; m1; m1s
+code in init to write "\nlogin:" on the terminal, but this
+isn't being displayed.
+
+We make it to 01363, the first instruction in wttyo, so the
+write syscall is hitting the right device. We do get into
+dsprestart at 03516, and we do make it to the dpcf instruction
+at 03527, but we don't get past here. We don't make it down
+to the sma instruction at 03531 or the ksf instruction at
+03537,