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Author Topic: Executable RAM  (Read 6740 times)

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SirCmpwn

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Executable RAM
« on: December 31, 2010, 05:11:00 pm »
Hello,
Does anyone have OS and model independent code for making both RAM banks executable?
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Offline calcdude84se

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Re: Executable RAM
« Reply #1 on: December 31, 2010, 05:59:16 pm »
I can provide info :D
Do you mean to make the whole $8000-$FFFF range executable RAM?
Except on the regular TI-83+, port 5 controls the RAM page in the $C000-$FFFF bank and any odd-numbered RAM page ($81,$83,$85,$87) is executable.
On the regular TI-83+, it might be possible to make RAM page 0 executable. (See ) However, this has never been tested AFAIK.
I can write up code if you really need it.
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SirCmpwn

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Re: Executable RAM
« Reply #2 on: December 31, 2010, 06:03:30 pm »
Which pages are available on models with missing RAM?
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Offline calcdude84se

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Re: Executable RAM
« Reply #3 on: December 31, 2010, 06:04:48 pm »
Only 3. $80 and $81 are as normal, but $82-$87 all refer to the same page. (So you can execute page $82 by paging it as $83)
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SirCmpwn

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Re: Executable RAM
« Reply #4 on: December 31, 2010, 06:05:38 pm »
Sweet, thank you!
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Offline calcdude84se

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Re: Executable RAM
« Reply #5 on: December 31, 2010, 06:06:20 pm »
Always glad to help! :D
Good luck! What is this for, specifically? (If you don't mind telling ;D)
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Offline jnesselr

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Re: Executable RAM
« Reply #6 on: December 31, 2010, 06:37:34 pm »
Oh, I didn't know 82-87 where all one page, I just thought that they got thrown out all-together.


@calcdude84SE probably the filesystem in KOS.
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SirCmpwn

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Re: Executable RAM
« Reply #7 on: December 31, 2010, 08:53:23 pm »
Oh, I just don't want the restriction in KnightOS
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