Some devices will only connect to your computer using a port called 'RS232 Serial Port'. This port was used on old computers before 2003.
Storage class drivers load on top of the port driver. This means that you can write storage class drivers for Windows with minimal concern for the unique hardware features of each SCSI adapter. The emulation capabilities of the SCSI Port driver also allow you to develop minidrivers that are much simpler to design and code than a monolithic port.
RS232 was the universal/popular port back in the old days just like USB is today.
In short, all you need to know is..
- In a driver pair, one driver handles general tasks that are common to a whole collection of devices, while the other driver handles tasks that are specific to an individual device. The drivers that handle device-specific tasks go by a variety of names, including miniport driver, miniclass driver, and minidriver.
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Modern computers no longer have RS232 port (extinct just like VGA port is). So all you need to get is a RS232-to-USB converter. It's about $5 on eBay. Just search for: rs232 usb
When you buy it, you'll need to install it to Windows-based computer. Here's how..
Step 1: |
Connect RS232 device into any USB port on your laptop/computer. Allow 20+- seconds for Windows to attempt to install drivers automatically.
If it's successful, skip to Step 2 below.
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However in 95% of cases, it will fail to automatically install the drivers. So you have to install drivers manually.
Here's how..
1) Disconnect RS232 device from your computer.
2) Install both driver packs below..
- Driver Pack 1
- Driver Pack 2
- Driver Pack 3
3) Restart your computer.
4) Connect RS232 device into any USB port. This time Windows will auto-install the drivers. You can verify a correct install going to Device Manager. Here's how..
Windows Vista/7/8/10:
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Control Panel » System » Device Manager
Windows XP:
Control Panel » System » 'Hardware' tab » Device Manager

You should see something like this:
If install STILL failed to install the drivers or above 'Prolific..' device has a yellow triangle next to it, then: Install the driver file from the disc that came with the RS232 Device.
Step 2: |
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Verify RS232 device is connected to COM PORT number between 1 to 4. This is a MUST, else it will not work.
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Here's how to do this..
Right-click on 'Prolific..' device in Device Manager and click on 'Properties'. As seen below. Then:
Download exone driver. That's it! It's now working 100% as it should. |
