I don't have the datasheet for this exact module, I do have the pinout though. I also know that it contains a few OKI M5839B's and a Sanyo LC7985NA which is HD44780 compatible. I'm not the only person who has seen this issue with this BG Micro display. Unfortunatly the board is wired strictly for 4 bit, the traces to the other 4 bits on the processor are non existant. If there were actual traces to these pins I would try hardwiring them. And yes, all is well until either a power down or a MIOS_Reset command. I'm begining to wonder if this display takes an odd command set or something. This is my first go at anything like this, so I'm kinda shooting in the wind. As far as the WIKI goes, all I can find is info on how to recompile an app to work in 4 bit mode, which I have already done. Also, the pinout shows R/W tied directly to ground. When I tie R/W to ground I get the normal black bars. I can tell it is doing something because it turns on the 2nd line of black bars after a few seconda. With R/W tied to the core, I get the strange 1 line problem.