You can buy a USB-to-serial adapter that plugs into your USB port and provides a serial port. I don't know if FreeDOS provides drivers to support USB-to-serial adapters but they exist. There are online stores that sell these adapters in great variety -- the chipsets used to support them vary, and at least one online store will identify the chipset for each of the adapters sold.

Again, and to be clear...I do not know if FreeDOS supports these adapters.

Bob Cochran

On 9/2/12 10:52 PM, Aman Singer wrote:
Hi, All.
        I have a laptop on which I would like to install Free DOS. I am,
however, in some difficulty. The laptop has only one serial port built in. I
am in need of two such ports. The unit has a USB port and several PCMCIA
slots, but no other serial port. If I may ask, is there any external
hardware which provides a serial port that I could use? Alternatively, does
FreeDOS support any PCMCIA or USB modems?
        Thanks.
        Aman Singer

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