Re: [myhdl-list] Describing a rom for Altera Quartus

[Frederik T. <sp...@ne...>]

Hello Norbo,

thank you for your email.

> So am not quite sure what this (attribute romstyle : string;  attribute
> romstyle of q : signal is "M9K";) does?

I think this tells Quartus to build a rom with M9K memory blocks. The
device must support the TriMatrix Memory architecture.

http://quartushelp.altera.com/11.1/mergedProjects/hdl/vhdl/vhdl_file_dir_romstyle.htm.htm

The synchronous rom doesn't need this extra attribute because Quartus
automatically builds a rom with memory blocks if "Auto ROM Replacement"
is activated. This is the default setting.

http://quartushelp.altera.com/11.1/mergedProjects/logicops/logicops/def_auto_rom_recognition.htm


Kind regards from Germany,

Frederik