SEALEVEL SYSTEMS, INC.
ACB 56
| 
 Card Type  | 
 Serial card  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Maximum Onboard Memory  | 
 Unidentified  | 
| 
 I/O Options  | 
 Serial ports (2)  | 
| 
 Hard Drives supported  | 
 None  | 
| 
 Floppy drives supported  | 
 None  | 
| 
 Data Bus  | 
 16-bit ISA  | 
| 
 Card Size  | 
 Full-length, full-height  | 
| 
 CONNECTIONS  | |||
| 
 Function  | 
 Label  | 
 Function  | 
 Label  | 
| 
 Serial Port 1 (V.35)  | 
 P3  | 
 Serial Port 2 (RS-232)  | 
 P4  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Label  | 
 Position  | |
| » | 
 Factory configured - do not alter  | 
 E2  | 
 Unidentified  | 
| » | 
 Factory configured - do not alter  | 
 E3  | 
 Unidentified  | 
| » | 
 Factory configured - do not alter  | 
 E4  | 
 Unidentified  | 
| » | 
 Factory configured - do not alter  | 
 E8  | 
 Unidentified  | 
| » | 
 Port 2 enabled  | 
 E9  | 
 Closed  | 
| 
 Port 2 disabled  | 
 E9  | 
 Open  | |
| » | 
 Port 1 enabled  | 
 E10  | 
 Closed  | 
| 
 Port 1 disabled  | 
 E10  | 
 Open  | |
| » | 
 Factory configured - do not alter  | 
 E11  | 
 Unidentified  | 
| 
 Note: The size and orientation of E2, E3, E4, E8, and E11 is unidentified.  | |||
| 
 BASE I/O ADDRESS SELECTION  | ||||||||
| 
 Setting  | 
 SW1/1  | 
 SW1/2  | 
 SW1/3  | 
 SW1/4  | 
 SW1/5  | 
 SW1/6  | 
 SW1/7  | |
| » | 
 238h  | 
 Off  | 
 On  | 
 On  | 
 On  | 
 Off  | 
 Off  | 
 Off  | 
| 
 280h  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
 On  | 
 On  | 
 On  | |
| 
 2A0h  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
 On  | |
| 
 2E8h  | 
 Off  | 
 On  | 
 Off  | 
 Off  | 
 Off  | 
 On  | 
 Off  | |
| 
 300h  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
 On  | 
 On  | 
 On  | |
| 
 328h  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
 Off  | 
 On  | 
 Off  | |
| 
 3E8h  | 
 Off  | 
 Off  | 
 Off  | 
 Off  | 
 Off  | 
 On  | 
 Off  | |
| 
 SERIAL PORT INTERRUPT SELECTION  | ||||||||||
| 
 IRQ  | 
 E6/A  | 
 E6/B  | 
 E6/C  | 
 E6/D  | 
 E6/E  | 
 E6/F  | 
 E6/G  | 
 E6/H  | 
 E6/I  | |
| 
 2/9  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | |
| 
 3  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | |
| 
 4  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | |
| » | 
 5  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 7  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | |
| 
 10  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | |
| 
 11  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | |
| 
 12  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | |
| 
 15  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | |
| 
 SERIAL INTERRUPT MODE SELECTION  | |||
| 
 IRQ  | 
 E6/J  | 
 E6/K  | |
| » | 
 Normal interrupt mode  | 
 Closed  | 
 Open  | 
| 
 Shared interrupt mode  | 
 Open  | 
 Closed  | |
| 
 DMA TRI-STATE DRIVER MODE  | ||
| 
 Mode  | 
 E7/G  | 
 E7/H  | 
| 
 DMA -State drivers permanently enabled  | 
 Closed  | 
 Open  | 
| 
 DMA Tri-State drivers enabled by status/control port bit 7  | 
 Open  | 
 Closed  | 
| 
 DMA disabled  | 
 Open  | 
 Open  | 
| 
 DMA CHANNEL SELECTION (HALF-DUPLEX)  | ||||||
| 
 Channel  | 
 E1/A  | 
 E1/B  | 
 E1/C  | 
 E1/D  | 
 E1/E  | 
 E1/F  | 
| 
 1  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Closed  | 
| 
 3  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Closed  | 
 Open  | 
| 
 Note: DMA must be enabled by setting the DMA Tri-State driver mode.  | ||||||
| 
 DMA CHANNEL SELECTION (HALF-DUPLEX) (CON’T)  | ||||||
| 
 Channel  | 
 E7/A  | 
 E7/B  | 
 E7/C  | 
 E7/D  | 
 E7/E  | 
 E7/F  | 
| 
 1  | 
 Open  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 3  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
 Open  | 
 Open  | 
| 
 DMA CHANNEL SELECTION (FULL DUPLEX)  | |||||||
| 
 Channel  | 
 E1/A  | 
 E1/B  | 
 E1/C  | 
 E1/D  | 
 E1/E  | 
 E1/F  | |
| 
 1 Receive/3 Transmit data  | 
 Closed  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | |
| » | 
 1 Transmit/3 Receive data  | 
 Closed  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Open  | 
| 
 Note: DMA must be enabled by setting the DMA Tri-State driver mode.  | |||||||
| 
 DMA CHANNEL SELECTION (FULL DUPLEX) (CON’)  | |||||||
| 
 Channel  | 
 E7/A  | 
 E7/B  | 
 E7/C  | 
 E7/D  | 
 E7/E  | 
 E7/F  | |
| 
 1 Receive/3 Transmit data  | 
 Closed  | 
 Open  | 
 Open  | 
 Closed  | 
 Open  | 
 Closed  | |
| » | 
 1 Transmit/3 Receive data  | 
 Open  | 
 Closed  | 
 Closed  | 
 Open  | 
 Open  | 
 Closed  | 
| 
 CLOCK INPUT MODES  | |
| 
 MODE  | 
 E5  | 
| 
 Normal receive  | 
 Pins 1 & 2 closed  | 
| 
 Inverted receive  | 
 Pins 3 & 4 closed  | 
| 
 Normal transmit  | 
 Pins 5 & 6 closed  | 
| 
 Inverted transmit  | 
 Pins 7 & 8 closed  | 
| 
 Transmit clock input enabled  | 
 Pins 9 & 10 closed  |