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Topics - quasi_Phthalo

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Other Calculators / LCD power supply?
« on: July 21, 2010, 10:29:25 am »
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?

2
Other Calculators / Some things never change (XKCD TI comic)
« on: July 19, 2010, 10:45:54 am »
hot off the xkcd press



 :D

3
ASM / WARNING! usb8x crossing
« on: June 25, 2010, 11:40:56 pm »
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

4
ASM / 'Clean' exit from ASM prog
« on: June 25, 2010, 02:20:24 pm »
I wrote an ASM program that upon exiting, clears the homescreen and disables displaying 'Done'. However, there is always a random letter at the cursor. Where is that letter stored? and should I set it to $20 before exiting?

thanks

5
ASM / 8xp file format
« on: June 24, 2010, 06:48:16 pm »
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

6
Computer Projects and Ideas / cool computer program
« on: June 21, 2010, 03:55:13 pm »
deskhedron! Ctrl+Shift+Z
careful, it can make you dizzy

7
Miscellaneous / Favorite TV Shows
« on: June 21, 2010, 12:16:26 am »
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

8
Other Calculators / high level language compilers for the z80
« on: June 20, 2010, 11:40:40 pm »
I know i'd found a C compiler for the 83 once (might have been pretty basic), but are there any C++ compilers for the 83? you know, classes and all? or Java maybe?

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ASM / TI-83/84 ports
« on: June 20, 2010, 11:37:49 pm »
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?

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