with 300, 1200, 2400 and 9600 baud modems. Almost every computer shipped (even today when everyone knows better) has this old slow chip. If you have a fast (V.32/V.32bis/HST/V.34/V.42/V.90) modem, and are experiencing dropped characters, CRC errors and aborted downloads, upgrade your serial port to a buffered UART (16550AFN). Look for 82x50B, 16x450 part numbers on the large 40-pin chips on the serial card to find out if your UART is New Boston 56k , New Boston, NH 56k New BostonNew Boston , 56k New Hampshire, New Boston 56k
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