EVEREX SYSTEMS, INC.
EV-391
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Data bus: 8-bit, ISA
Size: Full-length, full-height card
Hard drives supported: Two MFM ST506/412 drives
Floppy drives supported: None
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CONNECTIONS | |
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Function |
Location |
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34-pin control cable connector-hard drive |
J1 |
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20-pin data cable connector-drive 0 |
J2 |
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20-pin data cable connector-drive 1 |
J3 |
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USER CONFIGURABLE SETTINGS | |||
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Function |
Location |
Setting | |
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Normal operation |
W1 |
pins 1 & 2 closed | |
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Factory test |
W1 |
pins 2 & 3 closed | |
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Normal operation |
W2 |
pins 1 & 2 closed | |
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Factory test |
W2 |
pins 2 & 3 closed | |
|
BIOS enabled |
W3 |
closed | |
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BIOS disabled |
W3 |
open | |
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I/O port address 320h |
W4 |
pins 2 & 3 closed | |
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I/O port address 324h |
W4 |
pins 1 & 2 closed | |
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BIOS size 32K or 64K |
W5 |
pins 1 & 2 closed | |
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BIOS size 16K |
W5 |
pins 2 & 3 closed | |
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8 Head hard drive with RWC (Head Select 3 invalid) |
W6 |
pins 2 & 3 closed | |
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16 head hard drive supported (Head Select 3 valid) |
W6 |
pins 1 & 2 closed | |
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Hard drive interrupt is IRQ5 |
W7 |
pins 1 & 2 closed | |
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Hard drive interrupt is IRQ2 |
W7 |
pins 2 & 3 closed | |
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Note:SW1/switches 5, 6, 7, and 8 are reserved for BIOS functions and should not be altered. | |||
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BIOS DRIVE TYPE TABLE - SW1 (FOR EPROM REV. 3.92A) | |||||||
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# |
Jumper 1 Drv. 1 |
Jumper 2 Drv. 1 |
Jumper 3 Drv. 0 |
Jumper 4 Drv. 0 |
Cap. |
Hds. |
Cyls. |
|
0 |
closed |
closed |
closed |
closed |
42MB |
5 |
977 |
|
1 |
open |
closed |
open |
closed |
21MB |
4 |
615 |
|
2 |
closed |
open |
closed |
open |
10MB |
2 |
615 |
|
3 |
open |
open |
open |
open |
10MB |
4 |
306 |
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MISCELLANEOUS TECHNICAL NOTES |
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This controller has a built-in low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5. |