Dear LL,
If you only need to program the HC705 parts, there is a built-in self-programming algorithm in these parts. I'v e appended App note AN966 wich tells you how to do it. Of course you'll need a legacy eprom programmer or eprom emulator.
BTW I keep all this legacy tools to upgrade/support old designs from my customers. For HC05 family I keep a CDS8 "jewel box" an EVM and some JICS boards. And of course a WIN95 camputer to run this stuff.
Cheers,
Celso
Enter "M68HC705" in the Enter Keyword search box at the upper right on this web page. It will turn up about six hits. None of these are on your specific board, unfortunately, but it looks like there is a datasheet in the batch that might help get you started.
---Tom