comboot: guarantee at least 256 shuffle descriptors

Make a static guarantee of a minimum of 256 shuffle descriptors.

diff --git a/doc/comboot.doc b/doc/comboot.doc
index a69bfc4..2c9d323 100644 (file)
--- a/doc/comboot.doc
+++ b/doc/comboot.doc
@@ -563,7 +563,8 @@ AX=0011h [3.05] Maximum number of shuffle descriptors
        This routine reports the maximum number of shuffle descriptors
        permitted in a call to function 0012h.
 
-       Typical values are 682 and 1365.
+       Typical values are 682 and 1365.  This is guaranteed to be at
+       least 256.
 
 
 AX=0012h [3.50] Cleanup, shuffle and boot