Amiga Explorer is 8x faster than I thought! (serial port question)

[zipper]

I use 115200 but I have 060 accelerator and GFXcard so the mobo can concentrate to the serial port. Without GFX card perhaps 1/2 or 1/3 of that but the less colours on the screen, the better speed. 320x240 2 colours maximizes what you can get.