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. |