Needham's Electronics

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

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

• https://twitter.com/johndmcmaster/status/1152975472302575616
• Doesn't support voltage level tweaking
• Doesn't support 8048

EMP-100

USB interface