The other programming Voltage to worry about is the Vcc...
This is not the +5V Vcc that is used to power the IC's on the programmer, it is the Vcc that is used for the ROM when programming.
Here is what I have been using for the Vcc on the different chips:
2716 - 5V
2532 - 5V
2732 - 5.6V
2764 - 5.6V
27128 - 5.6V
27256 - 5.6V
27512 - 5.6V
27010 - 5.6V (271001)
27020 - 5.6V (272001)
27040 - 5.6V (274001)
27080 - 5.6V (278001)
Note1: I have omitted the "C" from the ROM numbers. the voltages are the same for either type of chip - ie: 27512 and 27C512 are the same for the purpose of programming
Note2: The numbers in brackets are the alternate part numbers for the same chip.
You may need to alter the Vcc setting if you are not getting successful burns... For the AMD 27C020 I have found that Vcc at 5V works better than at 5.6V.
