From c98c22f7763ebbd435e3c1cdf9897dbb361ac52b Mon Sep 17 00:00:00 2001 From: 4am Date: Tue, 9 Jan 2018 16:36:40 -0500 Subject: [PATCH] more docs --- README.md | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/README.md b/README.md index 4133567..4852630 100644 --- a/README.md +++ b/README.md @@ -18,6 +18,17 @@ Application path: A2FC.SYSTEM Startup: ?PHOTOS/MYPIC.A2FC ```` +## Memory Usage + +`a2fc.system` loads at $2000 (like any `.system` file) but relocates itself to zero page. It loads the given `.a2fc` file into hi-res page 1, but only $2000 bytes at a time, so it never touches hi-res page 2. + +```` +0050..0096 relocated program code +2000..3FFF graphic data +2000..3FFF/aux graphic data +9200..95FF ProDOS file buffer +```` + ## Tools to create A2FC files * [BMPA2FC](http://www.appleoldies.ca/graphics/index.htm#dhgr) (Windows)