DIGI INTERNATIONAL, INC.
PC/4
Card Type | Serial card |
Chip Set | Unidentified |
Maximum Onboard Memory | Unidentified |
I/O Options | Serial ports (4 RS-232), |
Hard Drives supported | None |
Floppy drives supported | None |
Data Bus | 8-bit ISA |
Card Size | Full-length |

CONNECTIONS | |||
Function | Label | Function | Label |
78-pin cable connector | CN1 | Daisy chain cable connector | P2 |
Daisy chain cable connector | P1 |
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Note: Pins 2 & 3 of connectors P1 & P2 are closed when in single board configuration. | |||
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | Factory configured - do not alter | DS1/8 | On |
» | Factory configured - do not alter | DS1/9 | On |
| Interrupt status register enabled | DS1/10 | On |
| Interrupt status register disabled | DS1/10 | Off |
PORT ENABLING SELECTION | ||
Port | Label | Position |
Port 1 enabled | DS2/8 | On |
Port 1 disabled | DS2/8 | Off |
Port 2 enabled | DS3/8 | On |
Port 2 disabled | DS3/8 | Off |
Port 3 enabled | DS4/8 | On |
Port 3 disabled | DS4/8 | Off |
Port 4 enabled | DS5/8 | On |
Port 4 disabled | DS5/8 | Off |
BOARD INDENTIFICATION SELECTION | |||
ID | J9 | J10 | |
» | Board 0 | Pins 2 & 3 closed | Pins 2 & 3 closed |
| Board 1 | Pins 2 & 3 closed | Pins 1 & 2 closed |
| Board 2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
| Board 3 | Pins 1 & 2 closed | Pins 1 & 2 closed |
Note: The primary board in the daisy chain must remain on the default setting. | |||
INTTERRUPT STATUS REGISTER BASE I/O ADDRESS SELECTION | |||||||
Setting | DS1/1 | DS1/2 | DS1/3 | DS1/4 | DS1/5 | DS1/6 | DS1/7 |
000h | On | On | On | On | On | On | On |
008h | On | On | On | On | On | On | Off |
010h | On | On | On | On | On | Off | On |
018h | On | On | On | On | On | Off | Off |
020h | On | On | On | On | Off | On | On |
3D8h | Off | Off | Off | Off | On | Off | Off |
3E0h | Off | Off | Off | Off | Off | On | On |
3E8h | Off | Off | Off | Off | Off | On | Off |
3F0h | Off | Off | Off | Off | Off | Off | On |
3F8h | Off | Off | Off | Off | Off | Off | Off |
Note: A total of 128 base address settings are available. The switches are a binary representation of the decimal memory addresses. DS1/1 is the Most Significant Bit and switch DS1/7 is the Least Significant Bit. The switches have the following decimal values:DS1/1=512, DS1/2=256, DS1/3=128, DS1/4=64, DS1/5=32, DS1/6=16, DS1/7=8. Turn off the switches and add the values of the switches to obtain the correct memory address. (Off=1, On=0) | |||||||
PORT 1 BASE I/O ADDRESS SELECTION | |||||||
Setting | DS2/1 | DS2/2 | DS2/3 | DS2/4 | DS2/5 | DS2/6 | DS2/7 |
000h | On | On | On | On | On | On | On |
008h | On | On | On | On | On | On | Off |
010h | On | On | On | On | On | Off | On |
018h | On | On | On | On | On | Off | Off |
020h | On | On | On | On | Off | On | On |
3D8h | Off | Off | Off | Off | On | Off | Off |
3E0h | Off | Off | Off | Off | Off | On | On |
3E8h | Off | Off | Off | Off | Off | On | Off |
3F0h | Off | Off | Off | Off | Off | Off | On |
3F8h | Off | Off | Off | Off | Off | Off | Off |
Note: A total of 128 base address settings are available. The switches are a binary representation of the decimal memory addresses. DS2/1 is the Most Significant Bit and switch DS2/7 is the Least Significant Bit. The switches have the following decimal values:DS2/1=512, DS2/2=256, DS2/3=128, DS2/4=64, DS2/5=32, DS2/6=16, DS2/7=8. Turn off the switches and add the values of the switches to obtain the correct memory address. (Off=1, On=0) | |||||||
PORT 2 BASE I/O ADDRESS SELECTION | |||||||
Setting | DS3/1 | DS3/2 | DS3/3 | DS3/4 | DS3/5 | DS3/6 | DS3/7 |
000h | On | On | On | On | On | On | On |
008h | On | On | On | On | On | On | Off |
010h | On | On | On | On | On | Off | On |
018h | On | On | On | On | On | Off | Off |
020h | On | On | On | On | Off | On | On |
3D8h | Off | Off | Off | Off | On | Off | Off |
3E0h | Off | Off | Off | Off | Off | On | On |
3E8h | Off | Off | Off | Off | Off | On | Off |
3F0h | Off | Off | Off | Off | Off | Off | On |
3F8h | Off | Off | Off | Off | Off | Off | Off |
Note: A total of 128 base address settings are available. The switches are a binary representation of the decimal memory addresses. DS3/1 is the Most Significant Bit and switch DS3/7 is the Least Significant Bit. The switches have the following decimal values:DS3/1=512, DS3/2=256, DS3/3=128, DS3/4=64, DS3/5=32, DS3/6=16, DS3/7=8. Turn off the switches and add the values of the switches to obtain the correct memory address. (Off=1, On=0) | |||||||
PORT 3 BASE I/O ADDRESS SELECTION | |||||||
Setting | DS4/1 | DS4/2 | DS4/3 | DS4/4 | DS4/5 | DS4/6 | DS4/7 |
000h | On | On | On | On | On | On | On |
008h | On | On | On | On | On | On | Off |
010h | On | On | On | On | On | Off | On |
018h | On | On | On | On | On | Off | Off |
020h | On | On | On | On | Off | On | On |
3D8h | Off | Off | Off | Off | On | Off | Off |
3E0h | Off | Off | Off | Off | Off | On | On |
3E8h | Off | Off | Off | Off | Off | On | Off |
3F0h | Off | Off | Off | Off | Off | Off | On |
3F8h | Off | Off | Off | Off | Off | Off | Off |
Note: A total of 128 base address settings are available. The switches are a binary representation of the decimal memory addresses. DS4/1 is the Most Significant Bit and switch DS4/7 is the Least Significant Bit. The switches have the following decimal values:DS4/1=512, DS4/2=256, DS4/3=128, DS4/4=64, DS4/5=32, DS4/6=16, DS4/7=8. Turn off the switches and add the values of the switches to obtain the correct memory address. (Off=1, On=0) | |||||||
PORT 4 BASE I/O ADDRESS SELECTION | |||||||
Setting | DS5/1 | DS5/2 | DS5/3 | DS5/4 | DS5/5 | DS5/6 | DS5/7 |
000h | On | On | On | On | On | On | On |
008h | On | On | On | On | On | On | Off |
010h | On | On | On | On | On | Off | On |
018h | On | On | On | On | On | Off | Off |
020h | On | On | On | On | Off | On | On |
3D8h | Off | Off | Off | Off | On | Off | Off |
3E0h | Off | Off | Off | Off | Off | On | On |
3E8h | Off | Off | Off | Off | Off | On | Off |
3F0h | Off | Off | Off | Off | Off | Off | On |
3F8h | Off | Off | Off | Off | Off | Off | Off |
Note: A total of 128 base address settings are available. The switches are a binary representation of the decimal memory addresses. DS5/1 is the Most Significant Bit and switch DS5/7 is the Least Significant Bit. The switches have the following decimal values:DS5/1=512, DS5/2=256, DS5/3=128, DS5/4=64, DS5/5=32, DS5/6=16, DS5/7=8. Turn off the switches and add the values of the switches to obtain the correct memory address. (Off=1, On=0) | |||||||
SERIAL PORT INTERRUPT SELECTION | ||||||
IRQ | J85 | J86 | J87 | J88 | J89 | J90 |
IRQ2 | Open | Open | Open | Open | Open | Closed |
IRQ3 | Closed | Open | Open | Open | Open | Open |
IRQ4 | Open | Open | Open | Open | Closed | Open |
IRQ5 | Open | Closed | Open | Open | Open | Open |
IRQ6 | Open | Open | Open | Closed | Open | Open |
IRQ7 | Open | Open | Closed | Open | Open | Open |
Note: Ports 1-4 must be set to accept either an odd or even interrupt. J1-J4 corresponds to ports 1-4. Place jumper on pins 1 & 2 for an odd interrupt or pins 2 & 3 for an even interrupt. | ||||||