Technical information

Serial Solutions NewBIOS Reference
Service B2H, Get/Set Card Type.
This service exists to support NewCOM, which can use
non-standard serial cards. The inherent limitation of the
serial ports on a standard IBM PC or clone is the number
of ports that can use buffered i/o. Many cards are therefore
manufactured which circumvent this limitation. These
require special treatment, and this service tells the device
driver that the port specified is on a special card, and
supplies any relevant additional information.
Service B3H, Get/Control Buffers.
This service exists to support NewCOM, which can use
buffered i/o for more convenient and efficient serial
input/output. Subservices 0 and 1 read the status of the
buffers associated with a port. Subservices 2 and 3 flush
the buffers. Subservices 4,5,6 and 7 can disable/enable the
buffers for a port.
Service B4H, Get Serial Solution Capability.
This service reports the version of Serial Solutions being
used and the maximum number of serial ports supported.
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