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-rw-r--r--400.mu1
1 files changed, 1 insertions, 0 deletions
diff --git a/400.mu b/400.mu
index 2f7896c8..2a0be7cf 100644
--- a/400.mu
+++ b/400.mu
@@ -10,6 +10,7 @@ sig read-key kbd: (addr keyboard) -> _/eax: byte
 
 # disk
 sig load-first-sector-from-primary-bus-secondary-drive out: (addr stream byte)
+sig store-first-sector-to-primary-bus-secondary-drive out: (addr stream byte)
 
 # tests
 sig count-test-failure