Can VHDL custom instruction access on-chip memory?

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originally posted by ruling@Feb 8 2006, 04:36 PM

is it possible for custom instruction written in vhdl to access on-chip memory or registors? how? thanks! http://forum.niosforum.com/work2/style_emoticons/<#emo_dir#>/smile.gif

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it is possible to access up to 32 programmer visible registers (accessed by c0-c31 in inline assembly). These are implemented in ALUTs (I believe).

I don&#39;t know about the TCM (tightly-coupled memory). I mean if it is accessible by the programmer.

But if we implement the custom instruction in VHDL, how can we do that? I mean, access

these programmer visible registers.

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originally posted by kavi+feb 9 2006, 08:30 am--><div class='quotetop'>quote (kavi @ feb 9 2006, 08:30 am)</div>

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<!--quotebegin-ruling@Feb 8 2006, 04:36 PM

is it possible for custom instruction written in vhdl to access on-chip memory or registors? how? thanks! http://forum.niosforum.com/work2/style_emoticons/<#emo_dir#>/smile.gif

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=12644)

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it is possible to access up to 32 programmer visible registers (accessed by c0-c31 in inline assembly). These are implemented in ALUTs (I believe).

I don&#39;t know about the TCM (tightly-coupled memory). I mean if it is accessible by the programmer.

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