I've got a few 1"-square boards, with a layout that adapts a 0.8 mm qfp pattern on one side and a 0.5 mm qfp on the other to an equivalent number of pins on a 0.100" grid. It's intended for those prototype areas on so many development boards, and works quite well. I use it for wire-wrapping CPLD's, etc, on these pitches. The ones I have are 98 pins, so a qfp-100 won't fit, but I rather imagine that there are others that adapt the 240, 208, ... etc, down to something you can use if you want.

BTW, not many people use wire-wrap these days, but I can put together a board and have it working in a few hours, since I don't have to worry the issues of layout, routing, drilling, plating, etching, masking, silkscreening, edge-routing, and inspecting. I do have to inspect my work, of course, but I can do in a few hours what takes five days to get done in China, including shipping, and three weeks in the U.S. My yield is always 100%, too. Of course, the second board is nearly as much work as the first, and the third is exactly as much as the second ... and so on. They're really easy to revise, though, and nobody will notice.

I get pretty good results at frequencies up into the 120-130 MHz range. It seems as though the faster I run the circuitry, the lower the random noise level goes. Of course, not much of the circuitry sees that high frequency, but lots (sometimes thousands) of flipflops operate at that rate.

RE