5. What's Inside The Fly, Continued

I could find only one component of significance on the back of the main board. It's the chip toward the top of the board labeled "PMC 25LV512." This is a 512 kb (64 kB) flash memory chip from Programmable Microelectronics Corporation. Without input from LeapFrog it is difficult to guess what functions are assigned to this chip and to the 16 kB Intel chip on the front of the main board. It seems likely that user data is stored on the larger chip and applications in the smaller chip, but that is only speculation. For the record, the black rectangle between the two mounting holes at the top of the board is a piece of insulating tape. I removed it and found nothing of interest underneath.

Back of the LeapFrog Fly Pentop Computer's main circuit board - the board is actually about 2.5" (65.3mm) high and a bit less than 1" (25.4mm) across at its widest point

The front of the Fly's sensor board holds the optical pattern recognition sensor. It's the component at the bottom of the image below with the white looking square at the top. Actually, the square has a very reflective mirror-like finish. The sensor has 5 pins that connect to the circuit board. To the left of the sensor is a clear LED designed to light up the Anoto paper during pattern recognition. The ribbon cable at the top of the picture connects the sensor board to the main board. The circular piece of plastic on the bottom of the picture has openings for the sensor and LED as well as the ink cartridge, which is hidden by the sensor board. I didn't see anything of significance on the back of the sensor board.

Front of the LeapFrog Fly Pentop Computer's sensor circuit board - the board is actually about 1.625" (41.9mm) high and a bit less than .5" (12.7mm) across at its widest point