PROMISE TECHNOLOGY, INC.
DC420
| 
 
  | |
| 
 Data bus:  | 
 32-bit, VL-bus  | 
| 
 Size:  | 
 Three/quarter-length, full-height card  | 
| 
 Hard drive supported:  | 
 Two IDE (AT) interface drives  | 
| 
 Floppy drives supported:  | 
 Two 360KB, 720KB, 1.2MB or 1.44MB drives  | 
| 
 CONNECTIONS  | |
| 
 Function  | 
 Location  | 
| 
 25-pin parallel port - external  | 
 CN1  | 
| 
 9-pin serial port 1 - external  | 
 CN2  | 
| 
 10-pin serial port 2 - internal  | 
 CN3  | 
| 
 34-pin control cable connector - floppy drive  | 
 J1  | 
| 
 40-pin IDE (AT) Interface connector  | 
 J3  | 
| 
 4-pin connector - drive active LED  | 
 JP3  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Location  | 
 Setting  | |
| » | 
 Main board supports VL-bus ID3 (speed < 50MHz)  | 
 JP1  | 
 pins 1 & 2 closed  | 
| 
 Main board does not support VL-bus ID3 (speed > 50MHz)  | 
 JP1  | 
 pins 2 & 3 closed  | |
| » | 
 Factory configured - do not alter  | 
 JP2  | 
 pins 1 & 2 closed  | 
| » | 
 Floppy drive enabled  | 
 JP4/G  | 
 pins 1 & 2 closed  | 
| 
 Floppy drive disabled  | 
 JP4/G  | 
 pins 2 & 3 closed  | |
| 
 SERIAL PORT 1 (CN2) CONFIGURATION  | |||
| 
 COM/Address/IRQ  | 
 JP4/A  | 
 JP4/B  | |
| » | 
 COM1/3F8h/IRQ4  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
| 
 COM3/3E8h/IRQ4  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | |
| 
 Disabled  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | |
| 
 SERIAL PORT 2 (CN3) CONFIGURATION  | |||
| 
 COM/Address/IRQ  | 
 JP4/C  | 
 JP4/D  | |
| » | 
 COM2/2F8h/IRQ3  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
| 
 COM4/2E8h/IRQ3  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | |
| 
 Disabled  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | |
| 
 PARALLEL PORT (CN1) CONFIGURATION  | ||||
| 
 Address/IRQ  | 
 JP4/E  | 
 JP4/F  | 
 JP4/H  | |
| » | 
 378h/IRQ7  | 
 pin 1 & 2 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 3BCh/IRQ7  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | |
| 
 278h/IRQ5  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | |
| 
 Disabled  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 all pins open  | |
| 
 PARALLEL PORT BI-DIRECTIONAL FUNCTION  | |
| 
 Setting  | 
 JP5  | 
| 
 Bi-directional  | 
 open  | 
| 
 Uni-directional  | 
 closed  | 
| 
 MEMORY CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | |
| » | 
 512KB  | 
 (1) 512K x 8  | 
 None  | 
| 
 1MB  | 
 (1) 512K x 8  | 
 (4) 256K x 4  | |