readme update

README.md

@@ -1,17 +1,43 @@
 # ULX3S PCB
 
-This is work-in-progress place for putting
+This is a small (94x51 mm) standalone FPGA board 
-some wishes of a small (94x51 mm) FPGA board.
+for research and general purpose, with a full 
+featured selection of chips which I all wanted on 
+a low-cost PCB, but haven't found on the market.
+
+It's open source and open hardware because if it is
+good for my development on
+[F32C](http://github.com/f32c/f32c) SOC,
+it should be also good to other projects.
 
 ULX3S = University digital logic Learning eXtensible
 board release 3 with SDRAM, Successor of
 [ULX2S](http://github.com/emard/ulx2s).
 
+It can do things no other board can.
+
+It can self-reflash with a bitstream sent
+remotely from web interface over WiFi or from SD
+card browsed by onboard OLED display and buttons.
+
+It can completely power down and wakeup from
+battery backed RTC.
+
+Normally it has rich range of chips and connectivity
+required for many other open source projects:
+SDRAM, USB, PS/2, SDCARD, HDMI, FLASH, RTC, I2C, OLED, AUDIO, ADC,
+onboard FM/PSK antenna 88-433.92 MHz and 56 GPIO pins which
+are all routed as differential pairs and have pinout that
+is PMOD compatible.
+
+Schematics and PCB are done in open source KiCAD PCB editor:
+
     kicad ulx3s.pro
 
-[Schematics](/doc/schematics.pdf) is mostly complete.
+[Schematics](/doc/schematics.pdf) and is pretty close to final.
+
 [PCB v1.7 is produced](/pic/ulx3st-real.jpg)
-Important board features already work like
+Important board features are tested and work like
 USB-JTAG, SDRAM, SDCARD, HDMI, FLASH, RTC, I2C, OLED, AUDIO, ADC, 433.92MHz
 US2 can be used to plug USB-PS/2 combo keyboard but US2 feature as USB 
 host/device is not tested.