








          1-DTR/DSR flow control does not work, I am using a 16650.  

               The 16650 and similar devices do flow control on chip (in
               hardware)  Unfortunately DTR/DSR flow control is not
               supported.  One can use a special cable to achieve the
               desired flow control.  Simply move the wires for the DTR and
               DSR signals to the RTS and CTS signals at the PC end of the
               cable.  Then specify RTS/CTS flow control.

          2-Why is the IRQ not show in the Hardware Manager screen.

               During boot time, the SIO2K driver set does not know the IRQ
               that the serial port is going to use.  If the IRQ is
               reported when the IRQ is known (after boot time), then
               resource manager traps.  When the IRQ is known at boot time,
               as with PCI devices, the IRQ will be shown in the Hardware
               Manager screen.

          3-Why is a message about failing an integrity check being
          displayed.

               Assuming the drivers have not been otherwise altered, you
               are probably running a disk compression utility.  In order
               to use the SIO2K drivers, they must NOT be altered in any
               way, which includes compression.

          4-Why is the FIFO depth shown as 1 for a Hayes ESP when the port
          is used in compatibility (16550) mode via uart.sys.

               The 16550 emulation by the Hayes ESP seems to have a few
               problems. The compatibility mode should be avoided if
               possible, when ESP.SYS is loaded.  One of these problems
               causes the probed FIFO depth to show up incorrectly. 
               However, once uart.sys has detected a FIFOed device, the
               FIFO size will only be increased, not decreased.  Even
               though the probed depth is shown as 1, the 16 byte FIFOs
               (for a 16550) are still used.

          5-I am having problems using a Hayes ESP card in compatibility
          mode.

               Once ANY ESP port has been used in enhanced mode (touched by
               ESP.SYS), power much be cycled before ANY ESP port will
               again work in compatibility mode again.

               If your are not using ESP.SYS, try forcing a 16450 uart for
               the port in the uart.sys section of sio2k.cfg.  If this
               still fails, you should use enhanced mode only, via ESP.SYS.







          6-One of my applications complains that the buffers are not large
          enough.

               Why some people, including some programmers, insist on
               believing in the need for large buffers is beyond this
               writers comprehension.  The buffers in the SIO2K drivers are
               sufficiently large enough (and then some) for any
               application to work well.

