Adaptec PC/104 - Manual (Page 21)

Chapter 2 Hardware Installation 15
Parity Checking SP
Enabled * Close
Disabled Open
(* means default setting)
Jumper Block JP6 :
This jumper block provides six major PCM-3420 operation mode
settings , including data transfer mode, booting, fast SCSI , ..... etc.
Jumper Description
DT Set data transfer mode
DMA Enabled = Open
PIO (Programmed I/O)* = Close
BT Enable/Disable Boot from PCM-3420 BIOS
Enable* = Open
Disable = Close
M0 Reserved
M1 Enable/Disable Fast SCSI
Fast SCSI On = Open
Fast SCSI Off* = Close
SN Enable/Disable Synchronous Negotiation
Sync. Negotiation On* = Open
Sync. Negotiation Off = Close
DN Enable/Disable SCSI Target Disconnect
Enable Disconnect* = Open
Disable Disconnect = Close
R0 Reserved