To be fair, Kerb does a lot more than just midi. It does come with a MIDI-enabled version of Cynthcart but includes other software as well - including Steinberg's Pro-16 - and allows you to upload your own PRG files to the 2MB flash memory.
Ah, thanks for that info. I still just think it's beyond the scope of what I'm capable of at this time, as well as out of my price range. That would be a great next step though, if cynthcart gets too limited for me.
I have confirmed I'll have access to an eprom programmer, so I'm looking at chips to flash it with. I've found this site http://www.futurlec.com/ICEPROM.shtml
They sell the 27C64 eproms that it looks like I'll need, but I'm unsure on which one I should get. They offer 120, 150, and 200ns versions. I sort of assume the 200ns would be fine for something as old as the commodore, but I really have no idea what those timings actually mean. Can anybody confirm that these chips will work, and if so, which one I will need?
