Date: Mon, 6 Sep 93 16:26:21 CST
From: michaels AT vsl DOT com DOT AU (Michael Snoswell)
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: And one more question...


And why oh why did the ET4000AX-VLB constantly outstrip the Stealth-VLB???
Does the ET card use faster DRAM or VRAM or what? Given that we're talking
local bus, where do the extra wait cycles go, for say, the Stealth card giving
8-bit s->v of only 8000? Is this time spent waiting for the memory on the
VGA card itself? As 16 and 32 bit transfers were so much faster it implies
a bottle neck is in the write operation itself (ie the VGA memory can be
pushed faster than the 8-bit test implies). Theoretically the 8 bit
transfer should go at the clock rate, ie 33,000 on a x86/33 *if the VGA
memory can keep up*. Does anyone make a VGA card like this (out of interest)?
Are we seeing a test artifact at the changes between 8, 16 and 32 bit 
transfers?

wondering
		Michael Snoswell