Programming a TMM27128D with the TL866 EPROM Programmer

Although the TMM27128D (Toshiba) UV Erasable EPROM is not listed within the menus of the Xgpro software for the LT866ii Plus EPROM Programmer, I found that I was able to program a blank chip by selecting (AMD) AM27128A, unchecking the “Check ID” box, set VDD write to 5V and adjusting the VPP voltage to the maximum 18V. Note 18V is a little lower than the specified 21V, so while it worked and passed verification, it might not be the best solution. Good if you’re stuck in a fix though.