Needham's Electronics

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Formerly Dataman?

Notable for letting set programming voltage

https://www.docentelectronics.com/httpdocs/Needham/needham_electronics.htm

EMP-10

Modules: https://forums.arcade-museum.com/archive/index.php/t-405409.html

EMP-20

seems pretty popular, but parallel interface

http://ps-2.kev009.com/ohlandl/Needham_EMP20/EMP-20_Programmer.html

Emp-20 volt.png

Above: EMP-20 allows forcing VCC/VPP

http://www.docentelectronics.com/httpdocs/Chip%20Masters/Needham/EMP-20/EMP-20%20DEVICE%20LIST.htm

Lists some of the required modules (ex: 02A for 8742)

EMP-21

USB

EMP-20 vs EMP-21


EMP-100

USB interface