4. Supported devices - trufanov-nok/old-epson-drivers-epkowa-for-x64 GitHub Wiki

The current approach had been tested with Epson Perfection 1260 only. But firmwares for other models that supposed to work had been added to deb. The so files had been taken from iscan-proprietary-drivers-2.10.0.1-10.1.i586.rpm. According to the Epson website the following devices are supported:

GT-7200U, GT-7300U, GT-9400UF, GT-F500, GT-F520, GT-F550, GT-F570, GT-F600, Perfection 1250, Perfection 1250 Photo, Perfection 1260, Perfection 1260 Photo, Perfection 2480 Photo, Perfection 2580 Photo, Perfection 3170 Photo, Perfection 3490 Photo, Perfection 3590 Photo, Perfection 4180 Photo

Some of these models are same. For ex. looks like Perfection 1260 is just overseas rebranded japan GT-7300U.

Also, there is a list of supported devices in Epkowa backend sources that may be helpful for reference. In epkowa_ip.c:

  {0x010f, "libesint1F"},	/* GT-7200 / Perfection 1250 */
  {0x011d, "libesint23"},	/* GT-7300 / Perfection 1260 */
  {0x0116, "libesint32"},	/* GT-9400 / Perfection 3170 */
  {0x0118, "libesint43"},	/* GT-F600 / Perfection 4180 */
  {0x0121, "libesint41"},	/* GT-F500 / Perfection 2480 */
				/* GT-F550 / Perfection 2580 */
  {0x0122, "libesint52"},	/* GT-F520 / Perfection 3490 */
				/* GT-F570 / Perfection 3590 */
  {0x012d, "libesint66"},	/* GT-S600 / Perfection V10  */
				/* GT-F650 / Perfection V100 */
  {0x012f, "libesint68"},	/* GT-F700 / Perfection V350 */
  {0x0119, "libesint54"},	/* GT-X750 / Perfection 4490 */
  {0x012e, "libesint7A"},	/* GT-F670 / Perfection V200 */
  {0x083f, "libesint7E"},	/* Stylus CX4300/CX4400/CX5500/CX5600/DX4400 */

These are the models that require proprietary 32-bit firmware.

P.S. I suppose there are some newer Epson models that work with just Epkowa backend and don't need specific firmware lib. In this case you just need a 64-bit libsane-epkowa.so. Google for sane-backends-iscan-1.0.25-7.mga7.x86_64.rpm or something like that.