cyberserial dual-port serial (16550) port, universal PCI card design with built-in 32-byte fifo buffers to work in 32/64-bit, 3.3v/5v PCI and PCI-x slots
cyberserial dual + dos, 2-port serial (16550), universal PCI card design with built-in 32 byte fifo buffers to work in 32/64 bit, 3.3v/5v PCI and PCI-x slots
quartet serial PCI+dos, 4-port serial (16550), universal PCI card design with built-in 32 byte fifo buffers to work in 32/64 bit, 3.3v/5v PCI and PCI-x slots