diff --git a/README.md b/README.md
index 5a24426..dfc3ee6 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,9 @@
 
 ![usci](usci.png?raw=true "usci")
 
-## Jumper block
+## ROM option settings (SW1)
 
-* 1-2 and 3-4: controller test firmware (0x0000)
-* 1-2: 16-sector firmware (0x0100)
-* 3-4: 13-sector firmware (0x0200)
-* empty: firmware "put jumpers here" splash screen (0x0300)
+* 00: Firmware "put jumpers here" splash screen (0x0300)
+* 01: 16-sector firmware (0x0100)
+* 10: 13-sector firmware (0x0200)
+* 11: Controller test firmware (0x0000)