Dr.Frank KS also have newer A5 board now with normal SRAM and coin lithium cell. You can find photo of it on KS parts store site.
On October 26, 2019 7:54:39 PM EDT, Frank Stellmach <[email protected]> wrote: >Didier, > >it's quite unusual to have battery stickers on the back - maybe >somebody >already had replaced these. > >Btw, KS would probably replace the complete board (for a fortune) by >the >SnapHat version, as they don't replace the DALLAS chips any more. > >As you have the old board, yes, only the 2kB / small DALLAS nvSRAM >contains the calibration data, the 2x 32kB contains setup / STATE, >procedures, BASIC programs, and alike, so their content does not have >to >be restored. Only if you have programmed something, like the short cut >keys F1 .. F9, you would have to re-program that afterwards, but >directly over the GPIB. > >The 4 empty sockets are for 4x32kB volatile RAMs (62256 type) which >stores / buffers measurement data, that's not intended for additional >firmware. >KS demands about 500$ for an upgrade, and 30 years ago, on my first >3458A, I already upgraded this option 01 for a few bucks (about 4 x >5$/€ >today). > >You should also update the firmware to the latest version 8.1 or 9.1, >as >older versions have several bugs. > >Therefore, check the EPROM(s), if you have six 64kB of them, or only >one 512kB. >For both versions, FW images are available. > >Frank > > >_______________________________________________ >volt-nuts mailing list -- [email protected] >To unsubscribe, go to >http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com >and follow the instructions there. BR, Illya Tsemenko _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
