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
Card 02:
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