diff --git a/README.md b/README.md
index 5dc1d25..8869816 100644
--- a/README.md
+++ b/README.md
@@ -13,25 +13,34 @@ else if there is enough interest and participation.
 ### Hardware
 
 On the hardware side, the design is based on two Silicon Labs 4463 transceiver ICs and an STM32F302CBT6 ARM Cortex M4 microcontroller.
+One of the SiLabs ICs acts as a transceiver, while the other IC works as a receiver only. In receiver mode, each IC tunes to a different
+channel. When a transmission is scheduled, the ICs swap channels if the transceiver is not listening on the next transmit channel. This configuration
+may be construed as a violation of the AIS specification, but it makes for a much simpler PCB layout and negates the need for a 3-position RF switch.
+
 The GPS is a GlobalTop "LadyBird" unit, but any decent GPS module with NMEA and PPS output should work.
-The radio incorporates an external bandpass / LNA (NXP BGA2869) and a Skyworks 66100 front end (PA/switch).
+
+The RF board incorporates an external bandpass / LNA (NXP BGA2869) and a Skyworks 66100 front end (PA/switch).
+
 The transmitter output is nominally 0.5Watts (+27dBm) and it has a verified range of 5 nautical miles with a vanilla telescopic antenna (< 3dBi).
-The circuit is powered entirely from a 5V connection (USB for now, but leaning against it long term). It draws 135 mA in RX mode,
-and spikes up to 350 mA during transmission at full power. For persisting station data there is a 1Kbit Microchip EEPROM on board.
-I intend to use a Raspberry Pi as the front end of the transceiver, as the unit is supposed to be mounted outside, directly connected to its own antenna.
-The Pi will act as a source of power, a WiFi Access Point, a NMEA distributor and a web server for configuration and software updates. All communication between the transponder
-and the Pi is done over a single serial port.
 
 Persistent station data (MMSI, call sign, name, dimensions, etc) is stored on a 1Kbit EEPROM attached to I2C1. Remarkably, it works fine with the MCU's 
 internal pull-ups, but I updated the design to include external pull-up resistors on the SDA and SCL lines. The code should be modified if you choose to 
 install those.
 
+The circuit is powered entirely from a 5V connection (USB for now, but leaning against it long term). It draws 135 mA in RX mode,
+and spikes up to 350 mA during transmission at full power. 
+
+I intend to use a Raspberry Pi as the front end of the transceiver, as the unit is supposed to be mounted outside, directly connected to its own antenna.
+The Pi will act as a source of power, a WiFi Access Point, a NMEA distributor and a web server for configuration and software updates. All communication between the transponder
+and the Pi is done over a single serial port.
+
+
 ### Software
 
-There are two programs that need to be installed on the flash. The bootloader and the main application. The bootloader is
-optional, but it allows for software update via a very simple (albeit proprietary) serial protocol.
-
- 
+There are two programs that need to be installed on the flash. The [bootloader](bootloader/) and the main [application](application/). 
+
+
+