Date: Thu, 11 Jul 2002 02:41:22 -0600 (MDT) From: "M. Warner Losh" <[EMAIL PROTECTED]> Subject: Re: [LIB] L50 & USB?
In message: <[EMAIL PROTECTED]> "neil barnes" <[EMAIL PROTECTED]> writes: : I think that's the maximum rate the processor can get data to the bus. : There's no DMA AFAIK, and it's a slow 16-bit bus. It doesn't cause errors on : even a 100M network card, it just can't use all the available network : bandwidth (though the data it gets is still noticably faster than with a : 10M). There is a DMA standard for 16-bit PC Cards, however almost none of them implement it because the bridge chipsets have so many weird ways of doing DMA the Windows based "enablers" supported it badly. But you are correct that it is bus bandwidth issues that limit the speed of the PC Cards. Either the host bus is the bottle neck (if the bridge is on the ISA bus) or the timing specs of the 16-bit PC Cards causes the limit. Warner ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://www.silverace.com/libretto/ - Archives -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
