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Altera_Forum
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20 years ago

Can VHDL custom instruction access on-chip memory?

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
Altera_Forum's avatar
Altera_Forum
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20 years ago

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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.