hi and good day..
thx for the wonderful library, works great on my DS-LCD-TG12864E (ST7920 controller) in spi mode. (R/W = MOSI, E= CLK , PSB =LOW, RS=HIGH)
speed is quite ok in spi, gotta try the parallel mode soon. the liquid crystal itself may be limiter.
Hmm..is possible can u make point to point drawline (x1,y1,x2,y2) available? 
thx again 