I/O: Dell� OptiPlex� 4xxLe (4XXDL)
I/O: OptiPlex 4xxLe
(4XXDL)
Speaker | I/O Map
Keyboard Connector
Parallel Port Connector
PS/2 Mouse Connector
Serial Port Connector
VGA Connector
Speaker
The piezoelectric speaker is mounted on the system board. The
speaker emits beep codes, which identify a faulty component or
assembly and provide a report of the system status.
I/O Map
| Address |
Device |
| 0000 - 001F |
DMA controller #1 |
| 0020 - 003F |
Interrupt controller #1 |
| 0040 - 005F |
System timers |
| 0060 - 006F |
Keyboard controller |
| 0070 - 007F |
RTC and NMI mask |
| 0080 - 009F |
DMA page registers |
| 00A0 - 00BF |
Interrupt controller #2 |
| 00C0 - 00DF |
DMA controller #2 |
| 00E0 - 00EF |
Reserved |
| 00F0 |
Coprocessor busy clear |
| 00F1 |
Coprocessor busy reset |
| 00F8 - 00FF |
Math coprocessor |
| 01F0 - 01F7 |
Hard-disk drive controller |
| 0200 - 0207 |
Game I/O |
| 238 - 23F |
COM4 |
| 278 - 27F |
LPT2 |
| 2B0 - 2DF |
Alternate EGA adapter |
| 2E1 |
GPIB (adapter 0) |
| 2F8 - 2FF |
COM2 |
| 338 - 33F |
COM3 |
| 378 - 37F |
LPT1 |
| 3B0 - 3BF |
Mono display and printer adapter |
| 3C0 - 3CF |
EGA adapter |
| 3D0 - 3DF |
CGA adapter |
| 3F8 - 3FF |
COM1 |
| 
