This is my mini-site for ESP-GO ROMS – for more on ESP-GO,and many other projects, reviews, opinions and technical discussions – visit my website https://tech.scargill.net
Files are rboot.bin, rom.bin and esp_init_data_default.bin which should be located at 0, 0x2000 and 0x3fc000 respectively on a 4Mbyte ESP12
For anyone considering using custom firmware for ESP8266 or ESP32 today (2021+) I would recommend using Tasmota…. http://ota.tasmota.com/tasmota/ or http://ota.tasmota.com/tasmota32/ – these are the leading DEV versions, not RELEASE versions which are here and here