OnSpec 90c20 protocol

modulename: on20.ko

configname: CONFIG_PATA_PARPORT_ON20

Linux Kernel Configuration
└─>Device Drivers
└─>Serial ATA and Parallel ATA drivers (libata)
└─>OnSpec 90c20 protocol
In linux kernel since version 6.3 (release Date: 2023-04-23)  
This option enables support for the (obsolete) 90c20 parallel port
IDE protocol from OnSpec (often marketed under the ValuStore brand
name).

source code: