EPROM-Burner for the plus/4-userport burns all EPROMs from 2764 to 272001 and the CMOS-types. You can select the type with 4 switches and in the program. The connection is over the userport and the datasette-port. You can use EPROMs with burnvoltage 12,5V and 21V. The burner comes with the 32- pin-Textool, software and instruction-manual in German and English. Best working with a 256kb-plus/4.