[Coco] BIGGEST PROBLEM

[David Ladd]

John,

Also you have to take into account that all the modems I have looked in use
some form of micro controller/USB interface chip.

SATA is a type of serial communications as well, but it won't work with a
RS232 port.  All these type of communication standards use specific
interface chips to allow these serial interactions based on their specific
specifications.

Just to give you a crazy example.  Older Mac +, Mac Classic's and a few
other older Mac's had a DB25 SCSI port on the back of them.  Where I was
working one time we rented a G4 Power Mac to a client.  They then called us
a few hours later saying the Mac wasn't working.  We went to find out why.
They had a HP LaserJet 4 Parallel printer hooked to the SCSI port.  When I
walked in the room I smelled the horrid burned electronics smell.  I asked
them why they had hooked a PC parallel printer to a Mac?  They replied it
is a DB25 connection and it should just work.  I actually laughed.  I then
said.  DB25 connectors are actually used for many types of devices, but
that does not mean they are compatible at all.  Just because they all have
a DB25 connection doesn't mean they work together.  Though for them it cost
them $3000 Plus they had to replace their laser printer.

So I am just trying to say though is just because something says serial you
can't just connect them together and expect them to work.

That is where you need specific devices to convert between other devices,
which normally use some form of micro controller to convert the
specifications.  Example SATA you need a USB2SATA adapters.  To hook a
CoCo's bitbanger RS232 port to a current PC, you have to have a USB2RS232
converter.  Hell even to convert TTL serial to RS232 serial standards you
have to use a chip like a MAX232.

Now please don't take this as I am putting you down or making fun of you.
I in no way intend for this to read that way.  I am just trying to state
that when it comes to the generic term serial doesn't mean everyone works
together in a single happy world. :D  After working in a retail computer
store & service center for 11 years and then working on this stuff on my
own after that I have seen a LOT of bad things go wrong because people
assume things should just work.

Ok I am done with my skewed outlook/rant on this subject. :D

Please don't hate me just take my 2 cents and move on :P

+-----------------------------------------------------------------------+
| David Ladd a.k.a. PacoOtaktay a.k.a. Drencor                          |
| YouTube: http://www.youtube.com/user/PacoOtaktay                      |
| YouTube Gaming Live: https://gaming.youtube.com/user/PacoOtaktay/live |
| Websites: http://dwladd.com     &     http://www.theterrorzone.com    |
| G+:  https://plus.google.com/113262444659438038657                    |
| G+:  https://plus.google.com/+DavidLaddPacoOtaktay                    |
|                                                                       |
| Do you have your CoCo 3 yet?                                          |
+-----------------------------------------------------------------------+


On Mon, Mar 6, 2017 at 4:30 PM, John Guin <johnguin at hotmail.com> wrote:

> Hmm.  If I am reading the specs right (and there is no guarantee I am :) )
> USB supports the ITU-T V.250 specification.  In turn, that specification
> specifically calls out 9600 baud modems as supported and even still
> supports 300 baud.
>
> Seems like it "should just work."
>
> Someone with any insight here please correct me if I am wrong,
> John
>
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of David Ladd
> Sent: Monday, March 6, 2017 1:29 PM
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Subject: Re: [Coco] BIGGEST PROBLEM
>
> On Mon, Mar 6, 2017 at 2:03 PM, John Guin <johnguin at hotmail.com> wrote:
>
> > Can USB slow down to 9600 baud?  I know on the Arduino for the serial
> > monitor (and serial connections in general) you set the speed to 9600
> > to 115K or so.
> >
> > I could not find a minimum speed for USB documented anywhere, but saw
> > that you could connect older 9600 baud modems via USB.  Seems like
> > that would be do-able if this is the case.
> >
>
> ​Sorry forgot to post this in the last message.
> Here is the website related to USB standards.
> http://www.usb.org/home​
>
>
>
> > ​<cut>
> > ​
>
>
> +-----------------------------------------------------------------------+
> | David Ladd a.k.a. PacoOtaktay a.k.a. Drencor                          |
> | YouTube: http://www.youtube.com/user/PacoOtaktay                      |
> | YouTube Gaming Live: https://gaming.youtube.com/user/PacoOtaktay/live |
> | Websites: http://dwladd.com     &     http://www.theterrorzone.com    |
> | G+:  https://plus.google.com/113262444659438038657                    |
> | G+:  https://plus.google.com/+DavidLaddPacoOtaktay                    |
> |                                                                       |
> | Do you have your CoCo 3 yet?                                          |
> +-----------------------------------------------------------------------+
>
>
> ​
>
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