AFAIK 64 is the global limit for all COM receives; XOFF is sent at 40 
characters which is easily overrun, especially with a long turn-around time and 
receiving a packet.

  ----- Original Message ----- 
  From: Kurt McCullum 
  To: Model 100 Discussion 
  Sent: Monday, October 17, 2016 4:11 PM
  Subject: Re: [M100] mComm 1.5

  John, Thanks for info. Is that a TELCOM limit? The reason I ask is because 
when running virtual T with TS-DOS, I notice that the buffer can go to 255. Or 
at least the byte which holds the buffer size.


  On Monday, October 17, 2016 11:36 AM, John R. Hogerhuis <> 

  On Mon, Oct 17, 2016 at 7:14 AM, Kurt McCullum <> wrote:

    Even though the buffer is 256 bytes in size, TELCOM sends the XON/XOFF 
commands when the buffer is only slightly full, so I have had to block the 
sending of the data in small packets and check for XOFF.

  The serial receive buffer is 64 bytes.

  -- John. 

Reply via email to