[vcf-midatlantic] Need Yamaha C1 EPROM images

[Jonathan Gevaryahu]

On 12/15/2015 10:23 AM, Ethan via vcf-midatlantic wrote:
> Longshot but looking for the bios and 3rd chip EPROM images from the 
> Yamaha C1 286-10 "music" laptop.
>
> I posted the floppy disk dumps that are pack in including some 
> developer dox (including pinout of expansion connector!) in both disk 
> image and zip format online. I also posted the EPROM dumps that I have 
> -- I noticed text from the Copyright notices is corrupted so I'm 
> thinking my issue with the computer is the eproms are going bad. There 
> sems to be a lot of flaky/dead units out there (when I can find them.) 
> I think the machine is strange enough not to be able to use other 
> generic bios copies.
>
> Link of floppy files and my (prob bad) bios dumps:
> https://users.757.org/~ethan/pics/geek/Software/Yamaha_C1_Laptop/
>
>
>
Have you tried gently filing/sanding the pin edges to remove oxides, and 
redumping each eprom a few times? Do they read consistently or different 
each time?

-- 
Jonathan Gevaryahu
jgevaryahu at gmail.com
jgevaryahu at hotmail.com