BS2 letter codes

Sapphire

I've always wondered what, if anything, the BS2 letter codes stand for other than to identify the different modules. Does anyone know?

e
sx
p
pe
px

Tracy Allen

It's a good bet that "sx" came about because it was the first Stamp to use the Scenix SX chip. Then "e", it used the SX chip but backed up the speeds to exactly match the BS2, but added scratchpad ram etc, so I thought of it as BS2 "enhanced". The p series, could "p" stand for Parallax? Don't know.

Jeff Martin

Tracy Allen wrote: »

It's a good bet that "sx" came about because it was the first Stamp to use the Scenix SX chip. Then "e", it used the SX chip but backed up the speeds to exactly match the BS2, but added scratchpad ram etc, so I thought of it as BS2 "enhanced". The p series, could "p" stand for Parallax? Don't know.

Tracy is partly right!

The "sx" in BS2sx is because it's the first one after the BS2 that used an SX chip as its interpreter.
The "e" in BS2e is because it was designed to be more energy efficient than the BS2sx that proceeded it chronologically (lower current), but also included the enhanced memory features of the BS2sx (enhanced version of BS2).
The "p" in BS2p... I can't remember for sure but I think that was chosen because it was designed to have more performance than the BS2sx.
The "pe" in BS2pe is because it was designed to be a more energy efficient version of the BS2p.
The "px" in BS2px is to signify that it's an extended version of the p series.

Sapphire

Thanks Jeff. That's good to know. I kind of suspected the "sx" designation, but could not figure out the others.