Manuals

I/O: Dell� Latitude� LM

I/O: Latitude LM

Pin	Signal	I/O	Definition
1	EXK_MSDATA	I/O	External keyboard/keypad/mouse data
2	NC	N/A	No connection
3	GND	N/A	Signal ground
4	EXK_MSPWR	N/A	External keyboard/keypad/mouse supply voltage
5	EXK_MSCLK	I/O	External keyboard/keypad/mouse clock
6	NC	N/A	No connection
Shell	N/A	N/A	Chassis ground

Pin	Signal	I/O	Definition
1	RED	O	Red video
2	GREEN	O	Green video
3	BLUE	O	Blue video
4	NC	N/A	No connection
5	GND	N/A	Signal ground
6	GND	N/A	Signal ground
7	GND	N/A	Signal ground
8	GND	N/A	Signal ground
9	NC	N/A	No connection
10	GND	N/A	Signal ground
11	NC	N/A	No connection
12	NC	N/A	Reserved
13	HSYNC	O	Horizontal synchronization
14	VSYNC	O	Vertical synchronization
15	NC	N/A	No connection
Shell	N/A	N/A	Frame ground

Address	Device
0000 - 001F	DMA controller #1
0020 - 003F	Interrupt controller #1
0040 - 005F	System timers
0060 - 006F	Keyboard controller
0070 - 0071	RTC and NMI enable
0080 - 009F	DMA page registers
00A0 - 00BF	Interrupt controller #2
00C0 - 00DF	DMA controller #2
00F0	Coprocessor busy clear
00F1	Coprocessor busy reset
00F8 - 00FF	Coprocessor
01F0 - 01F8	Hard-disk controller
0220 - 022F	Audio-board configuration registers
0228 - 028B	FM synthesizer
02F8 - 02FF	COM2
0330 - 0331	MPU 401 MIDI connector
0378 - 037F	LPT1
03C0 - 03DF	VGA
03F0 - 03F7	Diskette controller
03F8 - 03FF	COM1

NOTE: The computer does not support IRQ sharing.

IRQ Line	Used/Available
IRQ0	Generated by the system timer
IRQ1	Generated by the keyboard controller to signal that the keyboard output buffer is full
IRQ2	Cascaded to second interrupt controller
IRQ3	Used by the infrared port (COM2)
IRQ4	Used by the serial port (COM1)
IRQ5	Used by the audio controller
IRQ6	Generated by the diskette drive controller to indicate that the diskette drive requires the attention of the microprocessor
IRQ7	Used by the parallel port
IRQ8	Generated by the system RTC
IRQ9	Software redirect to INTOA
IRQ10	Reserved
IRQ11	Reserved
IRQ12	Generated by the keyboard controller to indicate that the output buffer of the integrated touch pad or external PS/2 mouse is full
IRQ13	Used by the math coprocessor on the microprocessor
IRQ14	Generated by the hard-disk drive to indicate that the drive requires the attention of the microprocessor
IRQ15	Reserved