I have an ETI-660 that I built in the early 1980's around here somewhere. Possibly it even still works, though I'd need to find an old CRT TV to try. (probably need to replace the capacitors too). Coding in CHIP-8 was my intro to programming.
I designed and maintain an IDE for CHIP-8 development (http://octo-ide.com) which you might find enjoyable. If you wanted to run your programs on an ETI-660 I could easily make the assembler's base address configurable to suit that machine's memory map.
Thanks for the offer, but I'm not even sure if any of my code from that era survives. I'll have a look sometime.