[Coco] RS232 Pak needed

[Brian Blake]

6551's are getting pretty difficult to come by.  I did quite a bit of
testing of different 6551's for Roger a few years ago and had to scour the
Internet pretty hard just to find the ones I have.
On Sep 19, 2013 7:25 PM, "Al Hartman" <alhartman6 at optonline.net> wrote:

> Aren't the 6551s being made any more? I see auctions for the chip on
> eBay...
>
> Couldn't someone implement the functionality in an FPGA or something?
>
> -[ Al ]-
>
> -----Original Message----- From: Mark Ormond
> Sent: Thursday, September 19, 2013 7:02 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] RS232 Pak needed
>
> Actually the difficult part is the 6551a chip needed.
> The +5 to rs232 levels after that is the easy part.
> I've got a couple of max235's for some projects I've got in my head, they
> don't need any caps, and have 5/5 input/outputs.
>
> If you had one of the roger taylor coconet usb packs, they are a serial
> pak, plus a serial to usb chip.
> Remove the coconet rom, and you have a usb/serial pack.
>
> Or to see an easy to read schematic, read the drive pak schematic.
> Jp1 selects the rs232 pak  or the modem pak address.
> Instead of connecting a udrive to the 6551, wire up some max232's for a
> full serial port.
> Bonus, if you build your own, the rom is optional.
>
>
> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-bounces@**maltedmedia.com<coco-bounces at maltedmedia.com>]
> On Behalf Of Al Hartman
> Sent: Thursday, September 19, 2013 5:32 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] RS232 Pak needed
>
> I'm surprised nobody has done a project using a Max232 chip. Should be
> pretty easy to use one of those to create an inexpensive pak that could be
> built as a kit.
>
> Wish I knew EE. I'd do stuff like that to help people.
>
> Also a new lowerkit, composite adapter for Coco and Coco 2, even a disk
> controller like those two for the Dragon.
>
> -[ Al ]-
>
> -----Original Message-----
> From: Bill
> Sent: Thursday, September 19, 2013 4:23 PM
> To: Coco Enthusiasts
> Subject: [Coco] RS232 Pak needed
>
> I'm trying to start a Coco BBS on a Coco3, but I need an RS-232 Pak to do
> it with. Does anyone have one they would sell rather cheaply?
>
>
>
> Thanks
>
>
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