[Coco] Sneak peek

[Roger Taylor]

Well, here's the problem(s) with WDC's "lab rat" issued free 6551 
samples.  Look at pages 25 and up.  I see no reason to even try to 
use these chips right now, but I did report the problem I was having 
which seems to be related to the known chip bugs.  I can get brand 
new Rockwell 6551's at a decent price, so that is that.

http://www.datasheetarchive.com/W65C51S-datasheet.html



At 08:24 PM 2/14/2009, you wrote:

>That I do not know. You will also enjoy interfacing into all of the 
>different USB com ports etc....
>
>
>----- Original Message -----
>From: "Roger Taylor" <operator at coco3.com>
>To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>Sent: Saturday, February 14, 2009 7:35:01 PM GMT -06:00 US/Canada Central
>Subject: Re: [Coco] Sneak peek
>
>
>At 04:51 PM 2/14/2009, you wrote:
> >Roger,
> >
> >Didn't mean to hit a nerve. You did ask the public to design and
> >build a while back and had some offers.
> >That is all.
> >No need to over explain.......
> >:) Back at ya!
> >Regards,
> >Mark
>
>
>It didn't quite work that way, though.  :)
>
>
>
>Btw, getting back to quality chit-chat here... :)  while it's on my
>mind, I'm looking at that 6551 replacement chip I mentioned a few
>weeks ago here and was wondering if it has improvements over the
>Rockwell 6551 that you are aware of.  I've got 2 of these now that
>I'm about to try in my pak but just typing back and forth won't prove
>much.  If by chance it has a bigger FIFO it would be nice but the
>price of these chips I think is over twice the cost of the Rockwell
>chips I've obtained.  I'm trying to keep the pak cost as low as
>possible but then everything is socketed, so anyone would have the
>option of customizing the boogers to their liking, even preset
>jumpers for 6551 tastes.
>
>here's the 6551 replacment chip page
>http://www.westerndesigncenter.com/wdc/w65c51s-chip.cfm
>
>Features of the W65C51S
>     * Full duplex operation with buffered receiver and transmitter
>     * Data set/modem control functions
>     * Internal baud rate generator with 15 programmable baud rates
>(50 to 19,200)
>     * Program selectable internally or externally controlled receiver rate
>     * Programmable word lengths, number of stop bits and parity bit
>generation and detection
>     * Programmable interrupt control
>     * Program reset
>     * Program selectable serial echo mode
>     * 2 Chip Selects
>     * 14 MHz Operating Bus Speed
>     * 5V Power Supply
>     * Full TTL compatibility
>     * Bus compatible with 14 MHz W65C02S and W65C816S
>     * Bus Compatible with 65xx and 68xx microprocessors
>     * Replacement for CMD / GTE Harris / MOS Technology / GE / RCA /
>Synertek / Motorola / Freescale / Rockwell R6551, 65SC51, 65C51,
>6551, CPD65C51, 6551, 6850
>
>--
>Roger Taylor
>
>http://www.wordofthedayonline.com
>
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>
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-- 
Roger Taylor

http://www.wordofthedayonline.com