Hello,
I have Alan Snyder's C compiler running in case anyone would like to
play with it. It's from around 1975, so the syntax is yummily archaic.
The primary host is a PDP-10 running ITS, but there may also be machine
descriptions for Honeywell 6000 series and PDP-11.
At some point it seems like this compiler was tangled with Stephen
Johnson's PCC.