[Coco] Sneak peek

[mike delyea]

Roger, would this work with a "Y" cable?

On Sat, Feb 14, 2009 at 2:58 PM, Mark Marlette
<mmarlette at frontiernet.net> wrote:
> Roger,
>
> Ah  see your point of view now. Thanks for the explanation of what ROM you are using.
>
> I am pretty sure you didn't do the hardware design or lay the board out. Not picking on you but I can tell in some of your posts you are not a hardware guy.
>
> Not James but james. Anyone that follows this list knows EXACTLY whom I am referring to.
>
> I would tend to disagree with you on the statement of: ACIA or UART the CoCo loves best, and that would be the 6551. Believe me, the CoCo would LOVE a bigger buffer, so would the host!!
>
> The Atmel design work I am doing can cause a 3.2GHZ Dual core, blah, blah laptop to loose data if I don't invoke hardware handshaking at 230.4Kbaud. If the PC doesn't do anything else all is fine but if I start to run some REALLY big hardware compilers and push the performance of the machine, the PC can't keep up with a $8 chip.
>
> All is fun though.
>
> Regards,
>
> Mark
> Cloud-9
>
> ----- Original Message -----
> From: "Roger Taylor" <operator at coco3.com>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Saturday, February 14, 2009 11:19:13 AM GMT -06:00 US/Canada Central
> Subject: Re: [Coco] Sneak peek
>
> At 06:35 AM 2/14/2009, you wrote:
>>Roger,
>>
>>You know I love hardware, so I took a real close up look.
>>I am a bit confused.
>
>
>
>>Your web site shows the CoCoNet pak but yet you are using a RS232 pak. ??
>
> Nope.  The picture on the site shows EXACTLY the pak that I'm talking
> about which is not a Tandy Deluxe RS-232 Pak or any other Tandy pak,
> but it works like a Tandy pak because of the 6551 and where it's
> mapped in.  It's a simple design as you can see even from the scaled
> down image.
>
> My pak has an EPROM socket and I can put a copy of the RS-232 Pak's
> software on that EPROM and run my pak "as an RS-232 pak clone".
>
>
>
>>It appears from the pak in the picture, the Blue tooth device module
>>is in the upper left portion of the pak?
>
>  From the angle the pak was shot, yes, the module is right where you
> said it is.  :)
>
>
>
>
>>I admit I haven't followed the 6551 Hidden mode thread(s) that have
>>occurred in the past. Unless you are making a crystal change, how
>>would the RS232 pak not know how to use the hidden 115200 bps mode?
>>Then it really would be that it didn't know, it just that it
>>couldn't adjust the baud rate generator circuit to the numbers you
>>placed in the register. ????
>
> No crystal change.  Because my pak CAN USE the original Tandy Pak's
> ROM software,  that software CANNOT switch to the 115200 bps mode,
> unless I'm low on coffee again or suffering from a lack of
> sleep.  So, let me restate that For Testing Purposes, the RS-232
> Pak's ROM was the first thing ran in my pak, and all was well.  The
> "CoCo never knew the difference".
>
>
>>Can you further explain in detail?
>
> It's a drop-in replacement for the Tandy Deluxe RS-232 Pak, only
> wireless.  No 12V is needed.  Any CoCo out there can use this pak.
>
>
>>Who did the hardware design for you? Is this james's work?
>
> Are you absolutely sure I didn't do it?  James, who?
>
>
>>As each designer can select what ever chip set they would like.
>>Curious on why you selected a 6551 vs a newer chip set that would
>>have a larger built in FIFO?
>
> For "transparency" with existing CoCo software.  Plus, if you combine
> all of the ideas I had into one little ACIA pak, it all comes down to
> software, Mark.  This leaves whatever ACIA or UART the CoCo loves
> best, and that would be the 6551.
>
>
> --
> Roger Taylor
>
> http://www.wordofthedayonline.com
>
>
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