identify a 128x64 LCD display
It is probably made by Xiamen Arrow-tech. (Xiamen is in Fujian province, near Taiwan and attracted a lot of investment from island-based entities early on).

As is typical in the semi-custom LCD business their web page shows only a small fraction of their products, but you may be able to figure out the controller from the disassembled code and the variety of controllers shown on this page.