29 Jan
2008
29 Jan
'08
10:47 a.m.
Date: Tue, 29 Jan 2008 01:19:35 -0500
From: Dave McGuire
A slight diversion here...What is wretched about
the 8202? I ask
because I got ahold of a few not long ago (and some 8203s) and was
considering putting something together with them to play with.
As I recall, the timing, on chip-to-chip samples was all over the
place making it a headache to design a manufacturable product. The
second-generation 8203 is much better in that respect. I'd recommend
that you skip the 8202.
If it's a one-off and you have more than one sample, it may not
matter.
I thought it interesting that IBM avoided the problem of a DRAM
controller altogether on the PC and dedicated a channel of the 8237
DMA controller to serve as refresh generator. You'dve thought that
Intel would have made them a great deal on one.
Cheers,
Chuck