[Coco] RS232 Pak needed

[Al Hartman]

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 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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