where is LPM_ROM?

[Altera_Forum]

Hi, 

I'm trying to simulate VGA signals, and working with some tutorial I have, they've used LPM_ROM. Now, I understood I need to implement this by using Mega Wizard of Quartus, but in my Quartus (and I have 2 versions, 7.2, and 9.1 web edition) I can't find this ROM. I've searched in my Storage tab of the Mega Wizard and in all other tabs, but there's no LPM_ROM anywhere... Where do I find it? Regards, Roy

[Altera_Forum]

--- Quote Start ---  I've searched in my Storage tab of the Mega Wizard and in all other tabs.  --- Quote End ---   Really? It can be easily found in the Memory Compiler tab as "1- and 2-port ROM".

[Altera_Forum]

thanks, 

but I thought it should be called "LPM_ROM" and not "1- and 2-port ROM"... Roy

[Altera_Forum]

Who said it should? Actually, all internal RAM or ROM variants are finally instantiating an altsyncram block, whatever's there name. 

 lpm_rom is just a wrapper of altsyncram.

[Altera_Forum]

I think (but I may be wrong) that, once uppon a time, there was an LPM_ROM entry in the megawizzard. 

 The LPM_ROM module can still be instantiated directly in HDL as well, but there's no wizzard for it.

[Altera_Forum]

I think you are right - during the work on my project I used several old tutorials that were in the lab - and they also referenced LPM_ROM (which I switched to 2-port-Rom)

[Altera_Forum]

Ok, guys, thanks alot. 

I guess you're right... check out this pdf: http://www.altera.com.cn/literature/ug/ug_lpm_rom.pdf page 15, it says LPM_ROM inside the MegaWizard, but as you've stated, apparently it's an oldie. Thanks again, great forum that is! Roy