User`s guide

IDE hard disk drive jumper settings
Single drive
Master drive Slave drive
Model number
Conner CFS 1275A
Conner CFS850A
Conner CFS540A
Conner CFS425A
Conner CFS420A
Conner CFS270A
Western Digital
AC2540
Western Digital
AC2420
Western Digital
AC2340
Western Digital
AC2250
C/D jumpered
C/D jumpered 1 No jumpers
C/D jumpered
C/D jumpered 1 No jumpers
C/D jumpered
C/D jumpered 1 No jumpers
C/D jumpered
C/D jumpered 1 No jumpers
C/D jumpered
C/D jumpered 1 No jumpers
C/D jumpered
C/D jumpered 1 No jumpers
No jumpers
MA jumpered SL jumpered
No jumpers
MA jumpered SL jumpered
No jumpers
MA jumpered SL jumpered
No jumpers
MA jumpered SL jumpered
* CS (cable selection) can be jumpered for any configuration. When CS is
used, the drive is a master if pin 28 is grounded, and a slave if pin 28 is not
grounded.
DMA Assignments
1 Level 1 Assigned device
1 DMA0 1 Reserved
1 DMA1 1 Available
1 DMA2 1 Diskette drive controller
1 DMA3 1 Available
1 DMA4 1 Cascade from DMA1 to DMA2
1 DMA5
IS
pare
1 DMA6 Spare
DMA7 Spare
Specifications A-11