Latest drivers for this device can be found at the Oki.com a small cache of publicly available below. Though the Driver isn't specified to work on Operating Systems before Windows 7, it should function on Windows XP.
Windows ESC/P Printer Driver
File: ML320Win7_R2_42823.exe
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OKI Dotmatrix Printer Driver
File: dotmatrix_210354.tar
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OKI Microline 320 Turbo User Manual
File: User_Manual_28-107-106.pdf
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Printer Output Type: Monochrome
Printing Technology: Dot Matrix
Connections: USB
Max Print speed: Monochrome32 ppm
- Maximum Print Speed_Black - 435 cps
- Network Ready - No
- Printer Type - Dot Matrix
- Monthly Duty Cycle Pages - 13,000
Windows:
1. Double click on exe file.
2. Follow the on-screen prompts to extract the driver files.
3. Launch Add Printer Wizard.
4. When prompted for the Manufacturer and Model click on Have Disk.
5. Browse to the following location: "C:\OKIDATA\ML3201".
6. Click OK.
7. Follow the prompts to finish the driver installation.
Linux:
1. Untar downloaded tar file (tar -xvf *.tar)
2. Follow readme.txt instructions