What is the latest ROM version for the ISM420? How do I read it?

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The base part number is ISM420R1-C33. The ROM Code part number can be read from the GPS in OSP (Sirf Binary) mode only and the version is : “GS4e -4.1.2-P1”.

The GPS will initially come up in OSP at 115200 baud, unless you change it with the strapping pins 4 and pin 5 or have a SPI or EEPROM attached and then unit will start in NMEA 4800.

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