motorola cracker :
for serial connection I used cp2102 based adapter from ebay, it has wired RTS signal:
Software part is motorola cracer version 6.x (7 didn't work!!!). It has support for com port from 1 to 4, so change this in advance settings for your usb2UART adapter, then just boot MCU and read eeprom, here is a actual eeprom dump, with code 1790, you can see its on 3 places:
number in eeprom, directly after code (from my observation) can be:
06 - SAFE2 mode, you need to wait 1hour(info from here) to be able to enter pin
08 - SAFE1 mode, you can enter pin code to unlock
A0 - no code required
|locked for 1 hour|
|no code required|
|standard SAFE mode|
UPDATE: I have Motorola MCU with fixed volume problem, so I dump eeprom of this MCU as it has fixed problem, it didn't store volume value in eeprom and so this dump is "clean" of garbage. I try to load this dump to one of affected MCU, just to test how long it take to have volume issue back. For now it's looks ok.
EDIT: it didn't fix it radio volume is garbage at low tempreatures, of corse. But I have to try :)
any data are on my github including eeprom dumps.