>So should I be doing more than just bumping the R value? Is it 'safe' to >just change the R value, that is can anything bad happen from such a >hack? Is there anything I can measure (compare timings?) to ensure that >what's happening is what's supposed to happen? I do have a 'scope or two >laying about the joint . . . not that I know how to use 'em or anything! ><G> And what the heck is an *RAS line anyhow!??!? ><idiot hacker 'needs' to know :->
The comment about adding an 'HCT02 and a R-C net applied to new build only. Changing the value of the damping resistors is pretty "safe". You can only increase the delay on account of the increased R and the parasitic (and fixed) C ... unless you also add a discrete C, and the latter works best when in a "clock chopper" circuit, which the 'HCT02 is but one example. The function of the discrete R is actualy intended to damp out "ringin" in the *RAS (and also other signals where these appear in series). *RAS is "row address strobe", and is but one of the several signals which are employed to clock addresses and data into, and data out of the DRAM chips. From the leading and training edges of *RAS and *CAS are generated all kinds of clock signals internal to the DRAM chips. *RAS (and/or *CAS) can also be used as a "chip select", which is I believe the case here. -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
