8088 vs. 80c88

[Peter C. Wallace]

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:
>
>> 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
>

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