Usually there are three parts in a NVRAM,
1.SRAM
2.DS1210(or DS121x?)
3. 3V battery
This means we can make NVRAM by ourself,
HM6116+DS1210+two 1.5V AAA batteries=DS1220Y(2Kx8 NVRAM)
one 256K SRAM+DS1210+ one 3V battery(or two 1.5V AA batteries as an temporary solution)=DS1230Y=M48Z35Y 32kx8 NVRAM,
couple years ago I made following NVRAM for tek 11A32,last week I replaced the HM6116 with a 256K SRAM
and used it in CSA803(for a M48Z35Y=DS1230Y).it works well.by using larger capacity battery the life of data
storage will be much much longer!
you can see the picture of NVRAM I made.
/g/HP-Agilent-Keysight-equipment/topic/nvram_28_pin_encapsulated/30699861?p=,,,100,0,0,0::recentpostdate%2Fsticky,,,100,2,0,30699861
