TEXT View Source
# CORE INTERNATIONAL, INC.
CNT-AT2
+------------------------------------------------------------+
+------------------------------------------------------------+
Data bus: 16 bit, ISA
Size: Full-length, full-height card
Hard drives supported: Two ESDI drives
Floppy drives supported: Two 360 KB, 720 KB, 1.2 MB or 1.44 MB
drives.
Maximum heads/cyl.: 16 heads and 2048 cylinders
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-------------------------------------------+----------------|
| 34-pin data cable connector-floppy drive | CN1 |
|-------------------------------------------+----------------|
| 20-pin data cable connector-drive 1 | CN3 |
|-------------------------------------------+----------------|
| 20-pin data cable connector-drive 0 | CN4 |
|-------------------------------------------+----------------|
| 34-pin control cable connector-hard drive | CN5 |
|-------------------------------------------+----------------|
| 4-pin connector-drive active LED | CN6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Jumpers JP1, JP2, JP3, JP4, and JP7 are Factory configured |
| - do not alter. |
| |
| Jumper JP6, pins 2 & 3, are Not used. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------+-------------+------------|
| » | Cache enabled | JP4A | open |
|---+-----------------------------+-------------+------------|
| | Cache disabled | JP4A | closed |
|---+-----------------------------+-------------+------------|
| » | 32KB data buffer | JP5 | pins 1 & 2 |
| | configuration | | closed |
|---+-----------------------------+-------------+------------|
| | 8KB data buffer | JP5 | pins 2 & 3 |
| | configuration | | closed |
|---+-----------------------------+-------------+------------|
| » | 8/32KB data buffer | JP6 | pins 1 & 2 |
| | configuration | | closed |
|---+-----------------------------+-------------+------------|
| » | Supports a third floppy | JP11/jumper | open |
| | (DS2) on a twisted cable | 1 | |
|---+-----------------------------+-------------+------------|
| | Supports a third floppy | JP11/jumper | closed |
| | (DS4) on a straight cable | 1 | |
|---+-----------------------------+-------------+------------|
| » | Floppy drive 1 is | JP11/jumper | open |
| | configured as AT type. | 2 | |
|---+-----------------------------+-------------+------------|
| | Floppy drive 1 is | JP11/jumper | closed |
| | configured as PS/2 type. | 2 | |
|---+-----------------------------+-------------+------------|
| » | Floppy drive 0 is | JP11/jumper | open |
| | configured as AT type. | 3 | |
|---+-----------------------------+-------------+------------|
| | Floppy drive 0 is | JP11/jumper | closed |
| | configured as PS/2 type. | 3 | |
|---+-----------------------------+-------------+------------|
| » | Floppy drive port address | JP11/jumper | open |
| | 3F0-3F7h | 4 | |
|---+-----------------------------+-------------+------------|
| | Floppy drive port address | JP11/jumper | closed |
| | 370-377h | 4 | |
|---+-----------------------------+-------------+------------|
| » | Single-speed floppy | JP11/jumper | open |
| | supported | 5 | |
|---+-----------------------------+-------------+------------|
| | Dual-speed floppy supported | JP11/jumper | closed |
| | | 5 | |
|---+-----------------------------+-------------+------------|
| » | Floppy drive Precomp. is | JP11/jumper | open |
| | scaled by data rate: | 6 | |
| | | | |
| | 500KHz=125ns, 300KHz=208ns, | | |
| | 250KHz=250ns | | |
|---+-----------------------------+-------------+------------|
| | Precomp. fixed at 125ns for | JP11/jumper | closed |
| | all data rates. | 6 | |
|---+-----------------------------+-------------+------------|
| » | Hard drive port address | JP12 | open |
| | 1F0-1F7h | | |
|---+-----------------------------+-------------+------------|
| | Hard drive port address | JP12 | closed |
| | 170-177h | | |
|---+-----------------------------+-------------+------------|
| » | Chassis ground is connected | JP16 | closed |
| | to logic ground | | |
|---+-----------------------------+-------------+------------|
| | Chassis ground is not | JP16 | open |
| | connected to logic ground | | |
|---+-----------------------------+-------------+------------|
| » | Floppy controller enabled | JP17 | closed |
|---+-----------------------------+-------------+------------|
| | Floppy controller disabled | JP17 | open |
|---+-----------------------------+-------------+------------|
| » | Hard Drive Interrupt is | JP20 | pins 2 & 3 |
| | IRQ14 | | closed |
|---+-----------------------------+-------------+------------|
| | Hard Drive Interrupt is | JP20 | pins 1 & 2 |
| | IRQ15 | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Address | JP10/jumper 1 | JP10/jumper | JP10/jumper |
| | | 2 | 3 |
|--------------+---------------+--------------+--------------|
| | Disabled | open | open | open |
|---+----------+---------------+--------------+--------------|
| » | C800h | open | open | closed |
|---+----------+---------------+--------------+--------------|
| | CC00h | open | closed | open |
|---+----------+---------------+--------------+--------------|
| | D000h | open | closed | closed |
|---+----------+---------------+--------------+--------------|
| | D400h | closed | open | open |
|---+----------+---------------+--------------+--------------|
| | D800h | closed | open | closed |
|---+----------+---------------+--------------+--------------|
| | DC00h | closed | closed | open |
|---+----------+---------------+--------------+--------------|
| | Disabled | closed | closed | closed |
+------------------------------------------------------------+