20 Feb
2009
20 Feb
'09
6:24 p.m.
On Fri, 20 Feb 2009, Chuck Guzis wrote:
Date: Fri, 20 Feb 2009 18:14:49 -0800
From: Chuck Guzis <cclist at sydex.com>
Reply-To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Subject: Re: 8088 vs. 80c88
On 20 Feb 2009 at 20:54, Jim Lynch wrote:
We used V40s a lot in the 90's. Their DMA controller was really nice as well,
with 1M direct addressing. We drove 320x240 mono LCDs with minimal hardware,
DMAing the data nibble and the framing signals directly to the LCD. 1 bit in
memory was used as a long PDM stream for contrast adjust.
Peter Wallace
Chuck,
Personally I loved the Nec V25 and V35 microcontrollers for small
projects. For a "decent resource" on the Nec V20/30 did you look at
the Nec User's Manual for the V Series (~ 1 thick, Circa 1992)?
Yup, I've got it, but the V20/30-specific one is better (IMOHO) on
the nitty-gritty for programmers of those chips.
I liked the V40/V50 a lot--80186-ish, but with signals to tell you
which segment register was being used for memory references, so you
could have up to 4 separate 1MB memory spaces.
Cheers,
Chuck