Spencer,

Are you sure that your programmer saves in hex format? Isn't it saving in binary (or "raw") format?

I read some older messages from you and your hex file doubts and I think that the scenario is that:

1- you create a bitmap image
2- you want to save that image to a set of eproms
3- these eproms are 128k size. 128 k bits or 128 k Bytes?
4- your file is larger that the eproms, so you need to break the bitmap file in parts to save them in the eproms
5- you need info about hex file format to generate the files to your eprom programmer...

is that???

if it is correct, here we go:

1- as far as I remember intel hex files are intended to files up to 64 k Bytes (16 bit range address)... there is a newer or modified standard for 32 bit range address, I think... please, someone correct it if I'm wrong...
2- your bitmap file is larger than 64 kbytes? If so you'll need to split it in 64k parts (to fit in the eprom AND to be "translated" in hex format
3- to split your files look for some hex editor (Hex Workshop, UltraEdit 32...) to select 64K blocks and save your bitmap file in parts
4- save each of these blocks in your eproms...

HTH

orlando