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-rw-r--r--AltOS/index.mdwn13
1 files changed, 9 insertions, 4 deletions
diff --git a/AltOS/index.mdwn b/AltOS/index.mdwn
index 72e8cdc..1656283 100644
--- a/AltOS/index.mdwn
+++ b/AltOS/index.mdwn
@@ -37,10 +37,15 @@ The latest source, which may include unreleased work in progress, is always
available from [git.gag.com](http://git.gag.com)
in the project [fw/altos](http://git.gag.com/?p=fw/altos;a=summary).
-If you need to debug code on an Altus Metrum product, you may want our special
-version of SDCC containing a highly modified sdcdb with support for the cc1111
-debugging interface, which you can find on [git.gag.com](http://git.gag.com)
-in the project [fw/sdcc](http://git.gag.com/?p=fw/sdcc;a=summary). This is
+If you need to debug code on an Altus Metrum product, or want to do custom
+development, you need a 2.X version of SDCC. Version 3.X adds features that
+bloat the code generated on 8051 enough to overflow the available flash memory
+size. As a result, we maintain a fork of SDCC we call 'cc1111' that is based
+on the last upstream version of SDCC 2.X, plus a highly modified sdcdb with
+support for the cc1111 debugging interface. This is avilable as a package in
+Debian, or you can find the sources on [git.gag.com](http://git.gag.com)
+in the project
+[debian/cc1111](http://git.gag.com/?p=debian/cc1111;a=summary). This is
not necessary if you just want to rebuild AltOS and use it.
## Future Plans ##