X-Git-Url: https://jxself.org/git/?p=pdp10-muddle.git;a=blobdiff_plain;f=README.md;h=56a0c74385ac907172998d5ab0155b3fcf885121;hp=75ed9b64ff34df89a9ce69214b40a55341cd712b;hb=HEAD;hpb=233a3c5245f8274882cc9d27a3c20e9b3678000c

diff --git a/README.md b/README.md
index 75ed9b6..56a0c74 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,14 @@
-Placeholder.
+## PDP-10 Muddle written in MIDAS assembly language
+
+`<mdl.int>` contains Muddle for TOPS-20, from around 1981.
+There should also be support for ITS, but it won't build as is.
+
+`<mdl.comp>` contains a TOPS-20 Muddle compiler from around 1982.
+
+`<mdl.documentation>` documents the 1979 ITS Muddle 54.
+
+`<sys.unsupported>` contains a few progams in the Muddle ecosystem.
+
+`MUDDLE` contains Muddle for ITS, from around 1973.
+
+`mim` contains Machine-Independent MDL for TOPS-20 and VAX.