STORAGE DIMENSIONS
SDC802
|
Card Type |
Hard drive controller |
|
Hard Drives supported |
Up to 7 SCSI-1 devices |
|
Floppy drives supported |
Two 360KB, 720KB, 1.2MB, or 1.44MB drives |
|
Data Bus |
8-bit ISA |
|
Card Size |
Half-length, full-height |
|
CONNECTIONS | |||
|
Function |
Location |
Function |
Location |
|
25-pin SCSI connector - external |
CN1 |
34-pin cable connector - floppy drive |
CN3 |
|
50-pin SCSI connector - internal |
CN2 | ||
|
BIOS ADDRESS SELECTION | ||||||||
|
Setting |
JP1/1 |
JP1/2 |
JP1/3 |
JP1/4 |
JP1/5 |
JP1/6 |
JP1/7 |
JP1/8 |
|
C000h |
Closed |
Open |
Open |
Open |
Open |
Open |
Open |
Open |
|
C400h |
Open |
Closed |
Open |
Open |
Open |
Open |
Open |
Open |
|
C800h |
Open |
Open |
Closed |
Open |
Open |
Open |
Open |
Open |
|
CC00h |
Open |
Open |
Open |
Closed |
Open |
Open |
Open |
Open |
|
D000h |
Open |
Open |
Open |
Open |
Closed |
Open |
Open |
Open |
|
D400h |
Open |
Open |
Open |
Open |
Open |
Closed |
Open |
Open |
|
D800h |
Open |
Open |
Open |
Open |
Open |
Open |
Closed |
Open |
|
DC00h |
Open |
Open |
Open |
Open |
Open |
Open |
Open |
Closed |
|
Note:To disable BIOS remove chip U11 (not diagrammed). | ||||||||
|
INTERRUPT SELECTION | ||||||
|
IRQ |
JP2/1 |
JP2/2 |
JP2/3 |
JP2/4 |
JP2/5 | |
|
IRQ3 |
Open |
Closed |
Open |
Open |
Open | |
|
IRQ4 |
Open |
Open |
Closed |
Open |
Open | |
|
IRQ5 |
Open |
Open |
Open |
Closed |
Open | |
|
IRQ7 |
Open |
Open |
Open |
Open |
Closed | |
|
IRQ9/None |
Closed |
Open |
Open |
Open |
Open | |
|
WAIT STATE SELECTION | |||
|
Setting |
JP3/1 |
JP3/2 | |
|
Normal |
Closed |
Open | |
|
Zero |
Open |
Closed | |
|
FLOPPY INTERFACE CONFIGURATION | |||
|
Setting |
JP4/1 |
JP4/2 | |
|
Enabled |
Open |
Closed | |
|
Disabled |
Closed |
Open | |
|
FLOPPY DRIVE SPEED SELECTION | |||
|
Setting |
JP5/1 |
JP5/2 | |
|
Single speed |
Closed |
Open | |
|
Dual speed |
Open |
Closed | |
|
FLOPPY DRIVE PRECOMPENSATION SELECTION | |||
|
Setting |
JP6/1 |
JP6/2 | |
|
125ns |
Closed |
Open | |
|
187ns |
Open |
Closed | |
|
FLOPPY DRIVE STANDARD/IBM COMBO MODE SELECTION | |||
|
Setting |
JP7/1 |
JP7/2 | |
|
IBM Combo card |
Open |
Closed | |
|
Standard |
Closed |
Open | |
|
MISCELLANEOUS TECHNICAL NOTES |
|
Remove terminating resistors when connecting external and internal devices at the same time. |