RPF Raspberry Pi Model A

elinux.org's Raspberry Pi subsection
 * Board revision table w/ pictures

Earlier production run Raspberry Pi Model Bs (pre mid-October?) have only 256MB of RAM. All subsequent Model Bs have 512MB of RAM.

Model A Pis omit the SMSC LAN9512 - they have a single USB 2.0 port and no Ethernet capability.

Additional external links

 * A birthday present from Broadcom on the Raspberry Pi Foundation's news feed
 * Full documentation for the VideoCore IV graphics core (used in the BCM2835) as well as a complete source release of the graphics stack used by the BCM21553 cellphone SoC (which also has a VideoCore IV core) has been released