![]() Note that RS232 serial ports not recognised by the PC BIOS need special windows driver software installed, which is usually supplied with the hardware. Up to 999 installed serial COM ports will be displayed, not necessarily contiguously, but only three may be captured with ComCap Standard. Some of these serial ports can come and go as they are plugged and unplugged. ![]() Fixed serial ports with DB9 or DB25 connectors are now rare, although PCI or PCI Express expansion cards are available used, and removable USB, virtual and Bluetooth serial ports are common. When ComCap was originally designed all PCs had one or two fixed serial RS232 ports with a DB9 connector.
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