For obvious reasons most programmers do not include mask-orogrammed ROMs in their list of devices, not even for reading. If you can find a PROM with the same pinout then you can try reading the ROM as that (but don't try 'Verify' -- the better programmers do verification at high and low Vcc which some mask ROMs will not like!). Hoever, I've generally found it easier not to bother with a programmer for reading mask ROMs. I find it easier to use a 'User port' on one of my machines -- somethign like an 8255 card in a PC, or an HP GPIO card in an HP9000/200, or... Put the chip on a solderless breadboard or similar, wire the address pins to output lines of the user port and the data pins to inputs. Do the approriate thing with the enable pins (you can normally have the ROM enabled all the time for this). Then writie a trivial program to cycle through all the addresses, read in the data, and store it. -tony