Quartzlock 8A, MTI OCXO variant

This directory contains, a set of ROMs for the Quartzlock 8A GPS Frequency and Time Standard

Note, these are only appliccable for the MTI OCXO Variant.

Upper and Lower Program ROMs

MTI130999_U.bin and MTI130999_L.bin are the upper and lower program memory respectively.

Modern SV Patch

Logic in the original code will cause any SV broadcasting configuration bits newer than Block II satellites to be silently discarded. MTI130999_Lm.bin has been patched to accept a wider set of configuration bits and thus permits later generation SVs, yet still discards invalid LNAV frames.

PRN ROM

PRN6.bin contains the PRN codes for all 32 GPS SVs.
In my 8A, this was on a chip marked "K+K GPS5", however it had suffered some bit rot. This manifested as minor SNR variations, rather than inability to lock.
PRN6 should validate as correct gold code, if you figure out how it's packed. Think: it's hooked up to the IO controller ;)