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