Re: Possible way to do assembly on TI-82!
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Scott Rollings wrote:
>
> What exactly do you mean by "all the of Pics : 0x60 0x01 0x60 0x02...0x60
> 0xFF"??? What do you use to edit your 82? files (a hex editor)?
I use a hex editor to edit my files and for changing the checksum(the
checksum can be changed with fix.com). In and 82p file, and in the
memory of the 82, a picture name is stored by 0x60 0xXX where 0xXX
represent the picture number. For example, 0x60 0x00 means Pic1, and
0x60 0x05 Pic6. If you change the 0xXX to greater value that 0x05, it
will display some parts of the memory, and you can use StorePic to store
something there(maybe, not sure...).
> From what I know about assembly (even less about Z80) the 2
> instructions you put in wouldn't do much of anything that you would be able
> to notice. Why don't you have It jump to the beginning of the memory?
> Wouldn't that be like reseting the calculator?
I don't know assembly very well, these instructions were randomly
choosed (they were used for changing the screen mode on the 85), I
thought I would see something during the mode change, but it don't seem
to.
> What if you made a large blank program, backed up the calculator, wrote a small
> assembly program and put it in the area where the program was, made the program
> read-only, and put a jump instruction in the picture and sent it to your calc.
> That would be a reasonable way to do assembly. There is a password program for
> TI-85 that when you turn off the caculator and then turn it back on, it pops-up.
> We could do that to a ZShell like menu and have it pop-up when you turn on
> the calculator. That way you wouldn't have to mess with Y=X and the Shade
> stuff when you wanted to run assembly programs. You can store them in
> read-only program files (have a TI-BASIC Stop command at the beggining and
> skip over it with the jump) and you wouldn't have to worry about Pictures
> or messing up other stuff.
Have you tested it? Your idea looks very feasible. can someone test it?
(my link isn't functioning very well!)
I don't know very well the Z80; How can you install a 'program' that
will run at the startup, when ON is pressed?
Thanks.
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