diff --git a/latest/Firmware/README.md b/latest/Firmware/README.md
index bc56389..7ce5bc8 100644
--- a/latest/Firmware/README.md
+++ b/latest/Firmware/README.md
@@ -2,13 +2,13 @@
 
 This is a vanilla Eclipse CDT project. Import it into your workspace and (assuming you have ARM cross compiler installed) it should be straightforward.
 
-The application is mainly interrupt driven, with a single event queue being dispatched by an RTOS task. 
+The application is mainly interrupt driven, with a single event queue being dispatched by either main() or an RTOS task. 
 
 ### Key updates
 
  - Starting with board 6.1 you have the option of using FreeRTOS 10, but not by default
  - DFU can be achieved by jumping directly into the ROM bootloader, so there is no need for hardware to manipulate the BOOT0 pin
- - The TX_DISABLE signal is now supported
+ - The TX_DISABLE signal is now supported. It is currently active low (must be pulled down to disable). 
  - Board 9.3 adds 3 "status" (LED driving) signals for GPS, RX and TX