>Date: Sat, 21 Sep 2002 08:14:42 +0800 >From: Charlie Reyes <[EMAIL PROTECTED]>
> >Does anyone know which is the 8500's video chip? On the bottom of the MoBo >is a square chip labeled "RaDaC" (RGB, D/A) that sits right next to the >video connector. Topside, right next to the AV connector is a smaller >"7196" (D/A) chip and a larger "SixtySix" chip further away to the center. > >Both 7500 and 7600 have a "RaDaC" chip but not the 9500. > >Could the RaDaC chip (which receives signals from VRAM) be the video? Define what you mean by video chip. The CHAOS/Control chip(s) (not sure if that is one or two) is the bridge chip between the CPU/memory bus and the video bus. It is analogous to the Bandit chip over on the PCI bus. The SixtySix chip has to do with the video capture if my memory does not deceive me. The RaDaC is almost certainly the RAMDAC chip which converts bits in the video buffer (VRAM) into analog signals that go to the monitor. I think there may be one or two other chips involved. There were a lot of chips in Apple's on-board video. I'm sure the 7500 and 8500 motherboards cost Apple more to make than the 9500 board did. All the 9500 needed was one more Bandit, a PCI Arbiter (little 28 pin PLCC, probably a PLD) and three more $2 (retail) sockets. The on-board video required a bunch of extra chips, VRAM, VRAM sockets, yada, yada, yada. So unless the Bandit chip was way more expensive than all those custom video chips, the 7500/8500 had to cost more to make. Jeff Walther -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
