jtag burn of blank flash ?

[crashdox]

I haven't seen comments from anyone doing this, and perhaps it is just this one board...

with a completely blank flash, is it possible to burn using JTAG straight out of reset, or is the serial bootloader the only method available for this situation ? Out of reset, i get this continuously, and openocd won't take:

rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun 8 2016 00:22:57