CDU-31A ADAPTER BOARD Hard Disk/Floppy Controller Settings and Configuration

Card Type	CD-ROM drive controller card
Chipset	Unidentified
Maximum onboard memory	Unidentified
I/O options	CD-ROM audio in, line out
Hard Drives supported	None
Floppy drives supported	None
Data Bus	8-bit ISA
Card Size	Half-length, full-height card

CONNECTIONS
Function	Location	Function	Location
34-pin proprietary CD-ROM interface - internal	CN1	Line out	CN3
Audio in - CD-ROM	CN2	50-pin proprietary CD-ROM connector - external	CN4

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	JP1/C	Reserved
»	Factory configured - do not alter	JP1/D	Reserved
»	Factory configured - do not alter	JP2/D	Reserved
»	Factory configured - do not alter	JP3/D	Reserved

DMA CHANNEL SELECTION
Channel	JP2/A	JP2/B	JP2/C	JP3/A	JP3/B	JP3/C
1	On	Off	Off	On	Off	Off
2	Off	On	Off	Off	On	Off
3	Off	Off	On	Off	Off	On

INTERRUPT SELECTION
IRQ	JP4/A	JP4/B	JP4/C	JP4/D
3	Off	Off	On	Off
4	Off	On	Off	On
5	On	Off	Off	Off
6	Off	On	Off	Off

BASE I/O ADDRESS SELECTION
Address	JP1/A	JP1/B
320h	Closed	Closed
330h	Closed	Open
340h	Open	Closed
360h	Open	Open