[Coco] 16550 wasRe: RS232 paks

[Tim Fadden]

Hi Mark,

This is my throughput with zmodem also using scsisys 1.1 hard drive with 
modified os9, but not nitros. Using a Disto super II with a 4in1 card 
serial port.  I do have a bootable Nitros9 floppy with the scsisys 
drivers on them, so I could give it a shot with that, and let you know.  
>From my standpoint, the nitros9 floppy drivers lock up keyboard input, a 
feature I do not personally like.  I tend to type ahead a lot when doing 
stuff.  Even on High-end Sun servers running solaris. :-)

Tim

Mark Marlette wrote:
> Willard,
>
> Exactly my point. Zmodem by nature will re-xmit the loss but you can see that your effective baud rate goes in the tank.
>
> Was this Zmodem xfer saved to a hard disk or floppy?
>
> Regards,
>
> Mark
> Cloud-9
>
>
> ----- Original Message -----
> From: "Willard Goosey" <goosey at virgo.sdc.org>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Thursday, March 5, 2009 6:44:15 PM GMT -06:00 US/Canada Central
> Subject: Re: [Coco] 16550 wasRe:  RS232 paks
>
> On Wed, Mar 04, 2009 at 08:12:44AM -0500, David Hazelton wrote:
>
>   
>> I have one built by Conect (IIRC)  Since when I bought it I only used 
>> OS9, It worked great.  I did get better throughput then the RS-PAK.  I 
>> did mostly Zmodem for file transfers, but I also logged in to VAX 
>> machines and Unix based Machines at Work.  
>>     
>
> I bet it did!  Zmodem likes uarts with fat FIFOs.  Under OS-9 with a
> 6551, I couldn't ever get error-free zmodem downloads faster than
> 4800. :-(
>
> Willard
>