Changes
/* 64bit packets */
A0 data written to RTC, when A2=0=write
D0 data read from RTC, when A2=1=read, and only when pattern recognized
Note: Writes to the RTC chip are performed by using Z80 reads (PEEK). All that matters is and the A2 and A0 address lines, with the ROM mapped and at addresses corresponding to where the ROM is mapped.
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