ESP32 Micropython and the Memory Address

I was writing MicroPython to a new ESP32 board I got, and it was acting weird… looping the following over and over:

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun  8 2016 00:22:57

Turns out, if I’d read the documentation instead of just doing the same thing I’d been doing on the ESP8266’s, I’d have known I need to write it starting at 0x1000 instead of 0x0000.