I have recently got a 8510B software 4.0 with option time domain and
would like to upgrade (the display)to a more recent version. A friend
has the latest, 6.35 with the same option : we have swapped the EEPROM
boards and, no problem, I am running his latest version : conclusion,
the CPU and ROM boards are not matched. He downloaded his latest op
system on 2 cassettes but impossible to download the cassettes to
upgrade my display. What is the trick ? All the CPU and EEPROM boards
have some PAL and EPROM with exactly the same part number.The brute
solution would be to desolder all the EEPROMS (2X2X9 chips) and copy
each separately, a lot of pins and time consuming, perhaps with a flame
thrower but I am not sure if the friend will agree...... Is there a
more intelligent solution to overcome the protection ? Thanks
