Want a recommendation for a serial EEPROM or other non-volatile memory
in the 256k to 4Mb range to which a 12C509 may speak.

Constraints:
        - eight pin dip,
        - 5v supply,
        - small quantities (10-50).

For an antique computer, an 80C85 based Tandy 100/102/200 laptop, I have
volunteered to a group of users on the 'net to investigate the
construction of a simple device to act as offline storage.

I had envisaged a 12C509 talking to a serial EEPROM.

The interface to the laptop would be via the RS-232-like serial port,
which I can program under software control to all sorts of baud rates.
An 81C55 timer is used as the baud rate source.

Ideally I'd want to fit the two chips into a DB25 backshell; though they
are getting small nowadays, these backshells.

I expect to run the device from power available from the DB25 socket,
i.e. parasitic with "shocking" diodes, now that I understand why.  ;-)

--
James Cameron                                      (quozl@us.netrek.org)

Linux, Firewalls, OpenVMS, Software Engineering, CGI, HTTP, X, C, FORTH,
COBOL, BASIC, DCL, csh, bash, ksh, sh, Electronics, Microcontrollers,
Disability Engineering, Netrek, Bicycles, Pedant, Farming, Home Control,
Remote Area Power, Greek Scholar, Tenor Vocalist, Church Sound, Husband.

"Specialisation is for insects." -- Robert Heinlein.