rpi1:
0x4000104 rpi0 with wifi and headers
0x4000104 rpi1 with composite video
0x4000104 rpi1 with composite video and i2s header

rpi2:
0x4000140 rpi2 model b v1.1 2014 no composite, no wifi

rpi3:
0x4000140 rpi3 with wifi


rpi4:
0x4000160  mentioned in bootcode 2020-05-15
0x4000161  mentioned in bootcode 2020-05-15, potentially has 2 different mask roms
0x4000161  found on a B0T pi4b
0x4000162  bootcode-2020-05-15 checks for this cpuid, if present, .text.firmware_rev[0] bit 0 must be set
0x4000162  found on a C0 pi400