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Author Topic: The Axe Pages -  (Read 9075 times) Bookmark and Share
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DJ Omnimaga
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« Reply #105 on: 30 January, 2011, 11:29:04 »
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Also does the calc really have 65536 bytes of RAM? I always thought the regular 83+ had 32768, so maybe it would be good to specify what part of that 32768 is the RAM.
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« Reply #106 on: 30 January, 2011, 11:33:07 »
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Quote from: DJ Omnimaga on 30 January, 2011, 11:29:04
Also does the calc really have 65536 bytes of RAM? I always thought the regular 83+ had 32768, so maybe it would be good to specify what part of that 32768 is the RAM.
It has 65536 bytes of addressable memory locations. Different pages of RAM and ROM are swapped into those readable 65536 bytes when required. The total amount of RAM can be completely different.
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« Reply #107 on: 30 January, 2011, 11:37:32 »
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I see. Thanks for clarifying. Smiley
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« Reply #108 on: 30 January, 2011, 18:34:53 »
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Quote from: DJ Omnimaga on 30 January, 2011, 11:29:04
Also does the calc really have 65536 bytes of RAM? I always thought the regular 83+ had 32768, so maybe it would be good to specify what part of that 32768 is the RAM.

There are 65536 addressable bytes, but only 32768 of them are used for RAM ($8000-$FFFF). Even if you're on an SE and switched in other RAM pages there, RAM can still be only from $8000 to $FFFF (everything else is used for the flash). That's my suggestion in my earlier post Smiley
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« Reply #109 on: 31 January, 2011, 07:49:48 »
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I see. Thanks for the info. Smiley
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« Reply #110 on: 31 January, 2011, 08:06:49 »
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Quote from: Deep Thought on 30 January, 2011, 18:34:53
Quote from: DJ Omnimaga on 30 January, 2011, 11:29:04
Also does the calc really have 65536 bytes of RAM? I always thought the regular 83+ had 32768, so maybe it would be good to specify what part of that 32768 is the RAM.

There are 65536 addressable bytes, but only 32768 of them are used for RAM ($8000-$FFFF). Even if you're on an SE and switched in other RAM pages there, RAM can still be only from $8000 to $FFFF (everything else is used for the flash). That's my suggestion in my earlier post Smiley

Correct me if I am wrong, but can't the addresses from $0 - $8000 be mapped to Ram as well? Perhaps through ports?
« Last Edit: 31 January, 2011, 08:07:05 by Builderboy » Logged
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« Reply #111 on: 31 January, 2011, 17:38:10 »
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$4000-$7FFF can be mapped to either a flash page or a RAM page, same with $8000-$BFFF, but (I think) everything under $8000 is usually used for flash. $0000-$3FFF is always ROM page 0 and $C000-$FFFF is always RAM page 0.

Not completely sure, though. Someone correct me Cheesy
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« Reply #112 on: 31 January, 2011, 18:18:27 »
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Quote from: Deep Thought on 31 January, 2011, 17:38:10
$4000-$7FFF can be mapped to either a flash page or a RAM page, same with $8000-$BFFF, but (I think) everything under $8000 is usually used for flash. $0000-$3FFF is always ROM page 0 and $C000-$FFFF is always RAM page 0.

Not completely sure, though. Someone correct me Cheesy
That's the normal usage. I believe it's possible to map pages slightly differently if needed, but it's usually not needed... And some of the stranger re-mappings don't work on the TI-83+ BE, so using them would break compatibility.
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« Reply #113 on: 02 February, 2011, 04:55:06 »
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On others besides the 83+BE, port $05 will map RAM pages only to the $C000-$FFFF range.
(Port $06 controls $4000-$7FFF and $07 $8000-$BFFF, btw)
« Last Edit: 02 February, 2011, 04:55:20 by calcdude84se » Logged
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« Reply #114 on: 30 April, 2011, 01:49:30 »
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Necro.

Just found out MD5Buffer (which Axe uses for nearly everything) is actually part of tempSwapArea (L4, which I use for everything). That created a whole host of bugs that haunted me for a month x.x

Can the command index be changed so tempSwapArea is listed as 256 bytes instead of 323? That's the real number of bytes we're allowed to use.
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DJ Omnimaga
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« Reply #115 on: 08 May, 2012, 21:52:39 »
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Question: WIth the arrival of Grammer, wouldn't it be best to also include it in the Axe language comparison list of the manual to compare with Axe? It got a bit more popular over the last year so I thought it would make sense for people to compare. I know for instance that Grammer is interpreted and smaller, but is slightly slower, plus the fact it requires an extra app like BBC Basic (although you edit it with the BASIC editor) but I don't know the other differences.

Also it might be good to replace the following links in the doc:

http://axe.omnimaga.org to http://www.omnimaga.org/index.php?board=71.0
And
http://www.revsoft.org to http://www.revolutionsoftware.org
« Last Edit: 08 May, 2012, 21:57:25 by DJ_O » Logged
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