So, on my unit the entire range between 0x0800 and 0x0FFF is "blank" (0xFF). It doesn't appear to have any non-volatile ram, at least in that range. I guess my entire memory map is different that I have found in the available service manuals..
My EIP 575 has A105 (CPU) board part number 2020195 (-01 hand written) if that helps at all.. probably not..
Maybe HighPrecision can shed some light on the older '575 units?
The model and serial numbers read:
Mod: 575 CCN 1802
Hi Ash,
Between A105 old type (2020195-xx) and new type (2020215-xx) cards the memory and peripherals map is completely different, only the new 2020215 has one (EE)PROM (e2prom) allocated from 0x0800 to 0x0FFF (X2816A 2Kbytes type).
Old cards don't have any non-volatile configuration/calibration storage, only UV Erasable (E)PROM, 2516 or 2532 ancient types, the new card use three 27C128 UV (E)PROM with all option firmwares fitted.
On old card the options are added by additional UV (E)PROMs in related empty sockets as firmware extensions, for Opt.02 (Power Meter) is installed on A107 and contain either calibration table AND the PM firmware, it's important that the firmware is the SAME revision letter as the base firmware on A105 old type. For this reason Simon sells the entire set of (E)PROM (base + PM extension with cal data), obviously that CAL data isn't optimized for all counters, but only for the original calibrated unit.
Your EIP counter is a very early CCN#, this model (18GHz) was started with CCN:1800 in production and got new A105 card at CCN:1808, from CCN:1809 are all 575B models.