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Atmel produces what are believed to be the only CPLD devices sold in PDIP form: the ATF2500C and ATF750C . These devices are priced at between $5 and $8 at Digikey and Mouser. Programming hardware and software is available from Atmel.
Atmel provides free design software known as WinCUPL, which mainly supports programming in the CUPL programming language, a holdover from the DOS days. (Conversion of a VHDL file is briefly referenced in Section 5.4.1 of their CUPL reference manual.)
Practically, this information serves more for trivia purposes than anything else, and illustrates what remains of the early historical development of PLDs.
Even though PDIP parts are more familiar to beginners, it is more beneficial to start learning about contemporary CPLD components and programming using breakout boards and the VHDL and Verilog languages. Check out our CPLD wiki and tutorials. CPLD breakout board on sale soon!

Back when I was only a DIP designer I fought a bit with WinCUPL. I didn’t like it and went to Xilinx chips in PLCC, a big surface mount chip but there are through-hole sockets available for it.
“CPLD breakout board on sale soon!” this breakout board is for what chip?!
XC2C64A and XC9572XL