12F/12 Hard Disk/Floppy Controller Settings and Configuration
ULTRASTOR CORPORATION
12F/12
Data Bus | 16-bit ISA |
Card Size | Three-quarter length, half-height card |
Hard Drives supported | Two ESDI drives |
Floppy drives supported | Two 360KB, 720KB, 1.2MB, or 1.44MB drives |
CONNECTIONS | |||
Function | Location | Function | Location |
34-pin cable connector - floppy drive | J1 | 20-pin cable connector - drive 0 | J4 |
4-pin connector - drive active LED | J2 | 34-pin control cable connector - hard drive | J5 |
20-pin cable connector - drive 1 | J3 |
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USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
| » | Factory configured - do not alter | JP1 | Unidentified |
| » | Factory configured - do not alter | JP3 | Closed |
| » | On-board cache enabled | JP4 | Open |
On-board cache disabled | JP4 | Pins 3 & 4 closed | |
| » | Factory configured - do not alter | JP9 | Open |
| » | Third floppy drive with twisted cable - jumper drive as DS2 | JP11/1 | Open |
Third floppy drive with straight cable - jumper drive as DS4 | JP11/1 | Closed | |
| » | Drive 1 AT configured | JP11/2 | Open |
Drive 1 3.5 inch PS/2 configured (different pin 2 polarity) | JP11/2 | Closed | |
| » | Drive 0 AT configured | JP11/3 | Open |
Drive 0 3.5 inch PS/2 configured (different pin 2 polarity) | JP11/3 | Closed | |
| » | Floppy drive primary address is 3F0h | JP11/4 | Open |
Floppy drive secondary address is 370h | JP11/4 | Closed | |
| » | Single speed floppy drive enabled | JP11/5 | Open |
Dual speed floppy drive enabled | JP11/5 | Closed | |
| » | Precomp varies according to floppy data rate | JP11/6 | Open |
Precomp is 125 ns | JP11/6 | Closed | |
| » | Hard drive primary address select (1F0-1F7h) | JP12 | Open |
Hard drive secondary address select (170-177h) | JP12 | Closed | |
USER CONFIGURABLE SETTINGS (CONTINUED) | |||
Function | Label | Position | |
| » | Chassis ground not connected to logic ground | JP16 | Open |
Chassis ground connected to logic ground | JP16 | Closed | |
Floppy interface disabled | JP17 | Open | |
Floppy interface enabled | JP17 | Closed | |
| » | IRQ 14 select | JP20 | Pins 2 & 3 closed |
IRQ 15 select | JP20 | Pins 1 & 2 closed | |
Note: Jumpers JP1 and JP9 are removed on revision B00. Location of jumper JP16 is unidentified. | |||
CACHE CONFIGURATION | |||
Data buffer | JP5 | JP6 | |
| » | 8KB | Pins 2 & 3 closed | Pins 1 & 2 closed |
32KB | Pins 1 & 2 closed | Pins 1 & 2 closed | |
BIOS ADDRESS SELECTION | ||||
Address | JP10/pins 1 & 2 | JP10/pins 3 & 4 | JP10/pins 5 & 6 | |
| » | C8000h | Open | Open | Closed |
CC000h | Open | Closed | Open | |
D0000h | Open | Closed | Closed | |
D4000h | Closed | Open | Open | |
D8000h | Closed | Open | Closed | |
DC000h | Closed | Closed | Open | |
Disabled | Open | Open | Open | |
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