DS1307 not running?

[EarlyBird2]

Check the data sheet which says -

The slave address byte contains the 7-bit DS1307 address, which is 1101000, followed by the direction bit (R/W), which for a write is 0.

so
I2CRead SDA, SCL, $D0, $00, [RTCSec, RTCMin, RTCHour, RTCDay, RTCDate, RTCMonth, RTCYear, RTCCtrl]

should be

I2CRead SDA, SCL, $D0, $D0, [RTCSec, RTCMin, RTCHour, RTCDay, RTCDate, RTCMonth, RTCYear, RTCCtrl]

and read

I2CRead SDA, SCL, $D0, $D1, [RTCSec, RTCMin, RTCHour, RTCDay, RTCDate, RTCMonth, RTCYear, RTCCtrl]

obviously you need to sort out the control as you are using $D0 for that? Which if you are not using SQWO $00 I think.