Holy cow, I
think you've just found something that a Data I/O
UniSite won't handle. That's, umm, really unusual. (1702s
notwithstanding!)
How about the IMP-16 CROMs? Again, I think it takes a separate rig
to read those.
Or the HP512*8 or 256*16 masked ROMS that were used in the 9800
calculators and HP instruemtns of the early-mid 1970s (there's one in the
59309 digial clock for the HPIB state machine). Theyr'e mostly TTL
compatible, but have enalbe inputs you have to take to +12V, and need a
-2V bias supply.
My experience is that programemrs will only 'officially' read the devices
thay can program, which of course excludes masked ROMs. If a masekd ROM
can be read as some programamble device (say a 2316 which cna be red a a
2716, etc), then the prgorammer will read them. But if there never was a
user-prgoramamble version (as in the case of the above devices), then
it's unlikely that a programmer will be set up to read them.
-tony