so, there's this 'color pong' game out there for 83, and it doesn't work on 84s. It apparently messes with those you'd-be-well-advised-to-just-leave-this-alone commands for LCD port $10. I've never seen it run on an 83, but it supposedly gets you some yellowish and bluish colored pixels for an otherwise ordinary pong game. If you try to run it on an 84, however, this funky pattern happens in the upper left corner of the screen, and then it kinda flickers and fades. After doing this, the calc is still on, but the screen doesn't work, until you reset it (i can navigate the menus blind!)

Inspired to mess with the port after seeing the thread on the exclusive flipping commands, i replicated the color pong affect by sending $10 to the port (i haven't tried the other power supply instructions yet)

Does anyone know what in the heck $08 - $13 do to the LCD? is it harmful? and should i pursue a further study of these commands?

the setting:
I have braved the caverns of attempting to write an asm program that uses usb8x's msd driver to interface with a flash drive. I've managed to retrieve file handle to the file i want and read many correct bytes from it. 
the issue:
BUT, after a certain amount of time (the same every time), the data i am reading comes out as garbage. first the 'organized' kind of garbage that has patterns so it's obvious that it is actually data, just not the data i intended to read. then, comes some entirely random garbage. eventually, it runs across the correct data again after a while, but then it relapses again. 

what is going on? is the file handle being corrupted? is the driver not reading from the correct place?
i'm checking for the carry flag after each read and i'm checking that bc (# bytes read) = # bytes i told it to read

help! i'm drowing! thanks

Does anyone know what the file format for .8xp files is for compiled* asm progs.

*compiled, as if AsmComp() had been run on it

thanks

ok, so post your favorite tv shows (they can be discontinued reruns if you like)

i'll start:
-Eureka
-Mythbusters
-Stargate:SG1
-Warehouse 13
-NCIS
-Mentalist

does the z80 processor actually have 256 ports? and are they all used?
besides the plethora of USB ports on the 84, are there any that we still don't know what they're for?