
Hardware Reference Manual
PMC233/4/5 & PMC243/4/5 High Capacity Disk Solutions
5 Switch Settings
In general switch settings should not be changed from the factory default.
Note
:
Switches can be labeled On/Off or Close/Open. (On corresponds to Close, Off to Open)
PMC233 & PMC234
SW1
Factory
Default
Description
1
Off
If On Base Address Registers are disabled. IDE task
registers will default to 0x1Fx (Primary) and 0x17x
(Secondary)
2
On
Disable Native Mode
3
Off
Must be off for correct operation
4 On
Don’t
Care
PMC235
SW1
Factory
Default
Description
1
Off
Must be Off for correct operation
2
Off
Off to disable native mode operation
3
On
Off to force operation as legacy mode device
4 On
I/O
control
DDC No. Rx-URMH 090 Rev A
Issued 7 April 2002
19 of 27