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BC 5233T
Quick Reference Guide
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BC 5233T Series Board Layout & End Bracket
This header requires a optional I/O adapter from Cubix. Attempting to connect a device directly to this connector will damage the board.
Note: The COM2 header requires a optional I/O adapter from Cubix. Attempting to connect a serial device directly to this connector will damage the board.
| Jumper | Jumper on Pins 1-2 | Jumper on Pins 2-3 |
| JP1 - Ethernet | Enabled | Disabled |
| JP2 - SCSI | Enabled | Disabled |
| JP3 - Video | Enabled | Disabled |
| JP4,5,6 - CPU Speed | Do Not Change | Do Not Change |
| JP9 - Factory Set | Do Not Change | Do Not Change |
| sw1 | SW2 | SW3 | SW4 | SW5 | |
| Supervisory IRQ to 10 | ON | OFF | |||
| Supervisory IRQ to 15 | OFF | ON | |||
| Disable Supervisory IRQ | OFF | OFF | |||
| PS/2 Mouse on IRQ 12 | ON | ||||
| Disable PS/2 Mouse | OFF | ||||
| SCSII Upper 8 Bit Terminator Enabled | OFF | ||||
| SCSI Upper 8 bit Terminator Disabled | ON | ||||
| SCSI Lower 8 Bit Terminator Enabled | OFF | ||||
| SCSI Lower 8 Bit Terminator Disabled | ON | ||||
| Factory settings (default) | OFF | ON | ON | OFF | OFF |
| SW1 | SW2 | |
| Reset when DSR drops on COM1 | ON | OFF |
| Reset when DCD drops on COM1 | OFF | ON |
| Reset when DCD or DSR drops on COM1 | ON | ON |
| Reset disabled | OFF | OFF |
| Factory settings (default) | OFF | OFF |
Note: If positions 1 and 2 are both set to ON, then loss of DSR or DCD will reset
the BC processor.
| IRQ | Description |
| 0 | Timer Click |
| 1 | Keyboard |
| 2 | Second PIC controller |
| 3 | COM2 |
| 4 | COM1 |
| 5 | Available/Ethernet |
| 6 | Floppy Disk Controller |
| 7 | LPT1 |
| 8 | Real-Time Clock |
| 9 | Redirected IRQ2 |
| 10 | Available/IES (s2) |
| 11 | Available/SCSI |
| 12 | Available/PS2 Mouse (s2) |
| 13 | Math Coprocessor |
| 14 | Fixed Disk Controller |
| 15 | Available/IES (s2) |
| 0000-00FF | Various "AT" functions |
| 01F0-01F7 | IDE hard drive interface |
| 02F8-02FF | COM 2 |
| 03A0 | Cubix supervisory interface |
| 03A8-03AF | IES serial port |
| 03B4-03B5 | VGA |
| 03BC-O3BF | LPT1 |
| 03C0-03CF | VGA |
| 03D4-03D5 | VGA |
| 03F0-03F7 | Floppy/IDE |
| 03F8-03FF | COM 1 |
| PCI PORTS | |
| 0CF8-0CFF | Used by PCI chipset |
| EC00-EC7F | Used by SCSI adapter |
| E880-E8FF | Used by Ethernet controller |
| 10000-7FFFF | 127MB | Extended Memory |
| E000-FFFF | 128KB | Reserved for system and PCI ROM BIOS |
| C800-DFFF | 96K | Available as Expanded (EMS) or Upper Memory (UMB) |
| C800-CABFF | 11K | SCSI BIOS (if installed) |
| B800-BFFF | 32K | VGA/CGA Video Memory |
| B000-B7FF | 32K | VGA/Mono Video Memory |
| A000-AFFF | 64K | VGA Video Memory |
| 0000-9FFF | 640K | Conventional DOS |
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2000 by Cubix Corp., Carson City, NV, USA.