This Jumper Setting function is effective with Hard Sector mode. "Set Bytes per Sector" command takes precedence over this Jumper Setting function.
All the applicable numbers of byte are listed in Fig. 2-9A and Fig 2-9B.
Preceding to setting the jumper(s), thrn off the DC power.

Application : PCB Rev. 1,2 Jumper Location

	Jumper Setting	Numbers of byte
	JP164 (pin7-8)	1024 **(2048)
	JP164 (pin5-6)	2048 **(1024)
	JP164 (pin3-4)	512
	JP164 (pin1-2)	256
	JP173 (pin15-16)	128
	JP173 (pin13-14)	64
	JP173 (pin11-12)	32
	JP173 (pin9-10)	16
	JP173 (pin7-8)	8
	JP173 (pin5-6)	4
	JP173 (pin3-4)	2
	JP173 (pin1-2)	1

*  A drive as shipped is set as 332 Bytes/Sector (91 Sector/Track)
** In case of the PCB (SZ905) revision is "2", ** is applied.     

Fig. 2-9A Jumper Setting for numbers of bytes (SZ905)

The number of sectors is determined in either of the following ways :

(1) Given the number of bytes/sector :

Example : 332 bytes/sector are required :

Each track will consist of 90 sectors of 332 bytes each and one sector of 360 bytes.

Jumper setting :

(2) Given the number of sectors/track :

Example : 51 sectors/track are required :

Each track will consist of 50 sectors of 592 bytes each and one sector of 640 bytes.

Jumper setting :

Application : PCB Rev. 3 or more Jumper Location

	Jumper Setting	Numbers of byte
	JP162 (pin7-8)	2048
	JP162 (pin5-6)	1024
	JP162 (pin3-4)	512
	JP162 (pin1-2)	256
	JP163 (pin15-16)	128
	JP163 (pin13-14)	64
	JP163 (pin11-12)	32
	JP163 (pin9-10)	16
	JP163 (pin7-8)	8
	JP163 (pin5-6)	4
	JP163 (pin3-4)	2
	JP163 (pin1-2)	1

* A drive as shipped is set as 332 Bytes/Sector (91 Sector/Track)

Fig. 2-9B Jumper Setting for numbers of bytes (SZ905)

The number of sectors is determined in either of the following ways :

(1) Given the number of bytes/sector :

Example : 332 bytes/sector are required :

Each track will consist of 90 sectors of 332 bytes each and one sector of 360 bytes.

Jumper setting :

(2) Given the number of sectors/track :

Example : 51 sectors/track are required :

Each track will consist of 50 sectors of 592 bytes each and one sector of 640 bytes.

Jumper setting :