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-rw-r--r--src/pc80/Config.lb5
-rw-r--r--src/pc80/udelay_io.c9
2 files changed, 14 insertions, 0 deletions
diff --git a/src/pc80/Config.lb b/src/pc80/Config.lb
index 1750a83bde..7eb32b239f 100644
--- a/src/pc80/Config.lb
+++ b/src/pc80/Config.lb
@@ -1,11 +1,16 @@
uses CONFIG_IDE
uses CONFIG_CONSOLE_VGA
+uses CONFIG_UDELAY_IO
object mc146818rtc.o
object isa-dma.o
object i8259.o
#object udelay_timer2.o CONFIG_UDELAY_TIMER2
+if CONFIG_UDELAY_IO
+ object udelay_io.o
+end
+
if CONFIG_IDE
dir ide
end
diff --git a/src/pc80/udelay_io.c b/src/pc80/udelay_io.c
new file mode 100644
index 0000000000..870af079cf
--- /dev/null
+++ b/src/pc80/udelay_io.c
@@ -0,0 +1,9 @@
+#include <arch/io.h>
+
+void udelay(int usecs)
+{
+ int i;
+ for(i = 0; i < usecs; i++)
+ outb(i&0xff, 0x80);
+}
+