Moved VGA-emulating DirectX code from dispdib.c to a separate
file. Made it use a system timer and trap I/O accesses to the VGA
DAC registers to accommodate DisplayDib-using programs that try to
access the VGA hardware directly.

graphics/Makefile.in

diff --git a/graphics/Makefile.in b/graphics/Makefile.in
index 58913cf..10b5418 100644
--- a/graphics/Makefile.in
+++ b/graphics/Makefile.in
@@ -17,6 +17,7 @@
 	mapping.c \
 	painting.c \
 	path.c \
+	vga.c \
 	wing.c
 
 all: $(MODULE).o