Many eprom burners can write eeproms and flash. I know mine can. For developement, why not use a micro with the flash internal and ISP as they normally don't require a eprom burner to load the code. Many of them can also access external memory so you can write code to program your eeprom or flash etc. My expensive burn all programmer gathers dust these days.


As for your question regarding using devices >64k. Either tie the unused address lines to 0V or connect them to a latch that your code can write to, or if you have spare port pins, use them. This implements what is called 'bank switching'.

A good source for flash chips is from old PC motherboards - from Pentium1 onwards, most boards had flash bios which were usually a 1mbit flash device in the early days.