Wrote README text

hardware/contrib/richardeoin/README.md

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+This variant attempts to be as faitful to the Blackmagic mini as
+possible, but also has several diferences.
 
+The schematic and board have both been designed using Cadsoft EAGLE v6.4.0
 
-## 0603 Parts
+### Differences
 
-## Compatible with USB to Serial
+#### Uses 0603 [1608 Metric] components
 
-## SparkFun locking headers
+Makes reflow soldering much easier.
+
+#### Includes Level Translator
+
+This board incorporates the same level translator used in the full-sized Blackmagic, so it can be used to safely program 2.7V or 1.8V systems.
+
+#### USART Connector
+
+The STM32F103's USART1 peripheral is broken out into a 0.1" header. The hole centres are [slightly offset to allow a press-fit](https://www.sparkfun.com/tutorials/114).
+
+#### BOOT0 Button
+
+As well as the standard button for entering USB DFU mode, this variant
+also provides a button for pulling the BOOT0 pin high to activate the
+STM32 SystemMemory bootloeader. This means that /scripts/bootprog.py
+can be used to program and reprogram the chip over the USART1
+interface.
+
+### Parts and Costings
+
+* [Parts List][Parts.md]
+
+Parts Cost (Approximate): £14 + VAT ([uk.farnell.com](uk.farnell.com) August 2013)
+Programming Cable: £8.49 + VAT ([uk.farnell.com](http://uk.farnell.com/samtec/ffsd-05-d-06-00-01-n/ribbon-cable-idc-152-4mm-grey-10way/dp/1667659) August 2013)3D
 
-## Level Translator
 
-## Standard programming connector