hexagon5un / forth-vs-uv-eproms

Here Be Nothing But Dragons

Hi. This is some throwaway / quick-hack code to one-off burn an old synthesizer OS into a 27C160 UV EPROM. In particular, the ROM v. 1.13 for a Yamaha RM1x groovebox.

I wrote about my experiences with these ancient beasties here: https://hackaday.com/2019/01/02/fail-of-the-week-eproms-rats-nests-tanning-lamps-and-cardboard-on-fire/

If you've gotten here through some other path, you're probably lost. Not that there's anything wrong with that. Just don't expect there to be quality code or documentation here. :)

Set up Hackaday Forth on the black STM32F407 boards

Flash black board, with base.fs in ROM

Include eprom.fs in RAM

Progress / Notes to Self

Basically working, in that can read/write/verify EPROMS Not optimized, may only work when run from RAM esp timing with pulse-e is sketchy -- suboptimal programming + workaround rest is probably OK

Program works until it can verify -- this will endless loop when a chip is pre-programmed or otherwise fails to write. should probably have an attempt count and exit gracefully.

Need to tie in hook to programming over serial could do: send word + "program" and wait for ok would be slow. maybe I don't care.

Dump ROMS

1. call up folie

2. include eprom.fs if you need to

3. call up folie with the -c parameter to dump output to a file

4. "folie -p /dev/ttyUSB0 -c dump_now.txt"

5. head -n -1 dump_2018-12-02-233500.txt | tail -n +2 > foo

6. dump-all

7. (wait 15 min)

8. then edit the file to keep just the hex dump

9. then use xxd to convert to bits if needed.