On Wednesday, January 15, 2003, at 03:52 AM, James S Jones wrote: > Indeed, the B&W rev 1 primary channel is 33 MHz and the secondary is 16 > MHz. >
Sorry Sport, but based on my research , not correct. Its 66MHZ and 33MHZ, respectively. In the B&W Service Source Manual, in the Troubleshooting section, there is a Block Diagram in the General Section. (I personally refer to this block diagram as the "bible", putting to rest all the "wives tales " about the B&W System) As I read it, the Primary PCI bus is 66MZ (ATA66) with only the PCI graphics card slot interfaced with this bus. A PCI-PCI Bridge then processes the Primary PCI , 66MHz bus into a Secondary PCI bus running at 33MHZ (ATA33) The Firewire & USB controllers, Paddington I/O controller, the ULtra/DMA/33 (IDE 33MHz) controller and three PCI slots run directly off of this secondary bus The Ultra /DMA/33MHz controller dives the Boot Hard Drive. A Paddington I/o controller interfaces to the secondary bus ,creating a lower level bus that drives : sound/ I/O: Ethernet controller; CUDA; NVRAM 64 KB; and an ATA-3 (3MHz)/ATA PI that drives the Zip and the CD ROM drives,respectively BTW. Numerous posts on the G3 List ( and mucho data on XLR8your mac) have delineated the unstability of adding a slave drive to the master boot drive on the MOBO IDE 33MHZ drivers. Apple Engineering messed this up, hence the V2 MOBO that changed the IDE controller chip allowing a reliable Master-Slave Hard Drive configuration If you must have and/or want master-slave, best bet is to add a PCI IDE controller ( ATA33MHz bus) Albert B&W Yosemite V1 // XLR8 G4 500/ 1MB ZIF // 1024MB RAM PCI Radeon 7000 driving two Monitors (VGA +Apple Multiscan) PCI SIG Ultra 133/100 IDE Controller-IBM 60GXP 40GB PCI Adaptec 4300 PCI- FW Driver OS X.2.3 ,Native -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.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/g-list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
