Links of interest: http://oldcomputer.info/others/brother70/index.htm

Mame wip emulator: https://github.com/kfazz/mame_brother_wp

building on ubuntu 19.04: sudo apt build-dep mame QT_SELECT=5 make SOURCES=src/mame/drivers/wp75.cpp REGENIE=1 USE_SYSTEM_LIB_LUA=lua5.3:/usr/include/lua5.3 ./mame64 wp75 -debug

loading an apl file: (in mame debugger) let the rom run for a while, so memory is intitialized break load tutor.apl,5000 (tutor.apl should be in root of mame src) do PC=5008 go