Thank you for the part numbers and checksums for the ROMs. Unfortunately I do not have an EEPROM programmer so am unable to verify the checksums or program new ones. I would need a bit of help determining what programmer would be required to read these MOSTEK ROMs? Alternatively, perhaps someone could advise what programmer to get to program 27C4s? I might be willing to invest but then I would also need the code files, which, despite a bit of Googling I have not yet found anywhere. My Googling has turned up the possibility that either Motorola MCM68764 or Cypress CY7C264-55WE are pin compatible, but again, I have no idea what programmer would be compatible with those and still need the files. It seems that the feathertech archive is no longer available.
I did also come across this resource which suggests they may sell them:
I have sent them an e-mail asking whether the service is still available and at what cost.
In the meantime, if anyone has the images, a copy would be greatly appreciated.
