The mode 1 (16bit signed int) file looks more interesting.
It saves 0 as 0x0000, which is normal. But for the non-zero numbers here is the conversion table:
1: 0x0888 = 2184
2: 0x1111 = 4369 = 2184 x 2+1
3: 0x1999 = 6553 = 2184 x 3+1
Yes, it largely preserves the original numbers, but not quite exactly.