Selection is made with 14 jumper plugs on the SZ906 PCB.
Each plug represents a power of 2, from 2^0 (or 1) to 2^13 (or 8192) bytes/sector, representing 1-byte increments.
SZ906 PCB Rev.0 Jumper Location
SZ906 PCB Rev.1 Jumper Location

JP287	PCB Rev.0 JP161 or PCB Rev.1 JP167

Jumper plug No.	Number of bytes
JP161 or JP167 pin1-2	1
JP161 or JP167 pin3-4	2
JP161 or JP167 pin5-6	4
JP161 or JP167 pin7-8	8
JP161 or JP167 pin9-10	16
JP161 or JP167 pin11-12	32
JP161 or JP167 pin13-14	64
JP161 or JP167 pin15-16	128
JP287 or JP299 pin1-2	256
JP287 or JP299 pin3-4	512
JP287 or JP299 pin5-6	1024
JP287 or JP299 pin7-8	2048
JP287 or JP299 pin9-10	4096
JP287 or JP299 pin11-12	8192
Only JP299 pin13-14	16384

Fig. 2-8 Jumper Setting for numbers of bytes