In SX Microcontrollers, SX/B Compiler and SX-Key Tool, AZKY Alliance wrote:

The SX chip is very powerful and fast and similar to PIC type micro-controllers but much easier to learn and capable. They can use either Assembly or SX/B (SX BASIC) or both at the same time. I started with a BASIC STAMP 2 and moved up to an SX28 and later to the SX48/52. I bought the Parallax Professional Development Board (PDB) as part of the SX Programming kit but it looks like all they carry now is the SX Tech Tool Kit with the smaller board. The PDB seemed high but for everything you get - it was very nice. So you will need some kind of a board such as a Professional Development Board (PDB) or SX Tech Board. You will also need a programming tool called the SX-Key or SX Blitz module. I highly recommend the SX-Key because it has debugging capabilities built in that the lower cost Blitz does not. Visit the Parallax website and it should be clear. You will also use the SX-Key software which is free from Parallax to download.  You will also probably want to pick up some resonantors from Parallax being 4 MHz, 20 MHz and 50 MHz and also a power supply for the board. You will also want some SX28 DIP ICs too. If you get the SX Tech Tool Kit it comes with everything except for the 7.5vdc 1 amp power supply that you can purchase. You might want to start with that for $90 and then later get the PDB because it has all the bells and whistles on 1 "larger" board. Very nice!

[url=http://www.parallax.com/Store/Microcontrollers/SXProgrammingKits/tabid/140/ProductID/364/List/1/Default.aspx?SortField=ProductName,ProductName]http://www.parallax.com/Store/Microcontrollers/SXProgrammingKits/tabid/140/ProductID/364/List/1/Default.aspx?SortField=ProductName,ProductName[/url]

They also sell Proto boards, which can be used for final projects for the SX28 or starting project for the SX48. The SX48 has more I/O pins and RAM and program space than the SX28 but the SX28 is in an easier to use DIP chip for solderless breadboard work that the SX48 is not. And the proto boards are very low cost too - just need that power supply (and the SX-Key or Blitz). Keep in mind that solderless breadboard developent kits such as the PDB or SX Tech Board offer more flexibility than the low cost "solderable" proto boards - unless you like to solder and unsolder a lot. 

Check out the SX section on the Parallax website.

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