BIOS 16Mbit on two 8Mbit chips (SPI)?

Question

Iron

Please tell me how to flash the BIOS, located on two chips.
There is a developer mother, there is a 16Mbit BIOS, the board has 2 microcircuits of 8Mbit each.
Interested in questions:
- how to flash them, if the firmware file is 16Mb in size (maybe cut it somehow);
- how these flash drives are connected (so that it would be possible to flash both at once on the programmer, with one file).
PS
This is a theoretical question, the board has been restored, but it will be useful for the future.
The manufacturer sent a firmware file both for each chip (8Mb each) and one general (16Mb).
For those interested: yadi.sk/d/OhatHwr48_kRO
PPS
Inventory:
Programmer for SPI chips (any, from the simplest on LPT to more advanced, I have STERH-011 and BlackCat on Atmel 32u2)

Answer 1

Two microcircuits for UEFI are represented as a single address space of sizeof(SPI0)+sizeof(SPI1), even if they are of different sizes, so the rule is simple: cut off the header of the UEFI capsule (it does not enter the microcircuit and is used by the flasher) if it is, and then we divide the remaining file into parts according to the size of the chips. Even if the border passed according to some data, it's okay.

Answer 2

1. Don't use rghost for files. They will leave after a while and the most curious people from the future will not receive anything :(
2. Perhaps the software with which you can flash this mat. the board determines what and where to flash, but on the programmer, of course, this will not work and two files will be needed. But, these are just my thoughts, use this as food for thought (or supplement the available inventory in the question for your tricky business)