[Coco] USB to RS232

[Zippster]

I use serial connections from a modern PC to with a number of
old computers, as well a number of newer projects, like the
single board computers and ECB / S100 bus projects in the N8VEM
group where the serial port is the console controlling the computer.

Though USB to RS-232 adapters often work, they also often don’t.
I had one that refused to work with drivewire.
I’ve found it’s easiest for me to use a PCI card that provides RS-232
ports on my modern desktop PC’s (this isn’t an option for laptops of course).

They work perfectly for these types connections and can be bought
cheaply on ebay.  I think I paid about $10 delivered from a vendor in Hong Kong
the last time I bought one.

- Ed

> On Dec 4, 2014, at 9:20 PM, Gene Heskett <gheskett at wdtv.com> wrote:
> 
> On Thursday 04 December 2014 20:18:37 George Ramsower did opine
> And Gene did reply:
>>  Okay, I know a USB port is RS232 but I'm curious if there is an
>> adapter that takes the USB port on this PC and communicate with my Coco
>> using the old, familiar to me, RS232 port.
>>  For years, I've been able to transfer files back and forth from a PC,
>> running Winderz to my Coco until the old "Com ports" seem to have
>> vanished.
> 
> I'd imagine any of the usb to serial adapters could be made to work.  But 
> I'd get a bit pikity about the chips in the adapter, because generally 
> speaking, the prolific chips like to throw away the first byte on low use 
> circuits where they can be idle long enough to put themselves to sleep.
> 
> The FDTI offerings OTOH, I have never had a problem with as long as the 
> circuit runs +- 5% or so of a common baud rate.  The coco's bitbanger 
> usually needs tweaked with tuneport to hit it close enough. 
> 
> They will all hand you a db9 connector, generally wired in the 7wire 
> protocol.  Adapting that to a db25 can probably be handled with another 
> adapter at your Texas local Radio Shack.
> 
> Cheers, Gene Heskett
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
> 
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