HP DC71XX, DX61XX C.2.2 USB-TypeKeyboard Transmissions, C.2.3 Keyboard Layouts, C.2.3.1 Standard Enhanced Keyboards

Keyboard

C.2.2 USB-Type Keyboard Transmissions

The USB-type keyboard sends essentially the same information to the system that the PS/2 keyboard does except that the data receives additional NRZI encoding and formatting (prior to leaving the keyboard) to comply with the USB I/F specification (discussed in chapter 5 of this guide).

Packets received at the system's USB I/F and decoded as originating from the keyboard result in an SMI being generated. An SMI handler routine is invoked that decodes the data and transfers the information to the 8042 keyboard controller where normal (legacy) keyboard processing takes place.

C.2.3 Keyboard Layouts

Figures C-3 through C-8 show the key layouts for keyboards shipped with HPsystems. Actual styling details including location of the HP logo as well as the numbers lock, caps lock, and scroll lock LEDs may vary.

C.2.3.1 Standard Enhanced Keyboards

1			2				3		4				5				6		7				8			9			10				11		12		13	14	15	16
17	18		19			20			21			22			23			24			25			26			27			28			29			31		32	33	34	35	36	37	38
		40			41			42			43			44			45			46			47			48		49				50		51		30		52	53	54	55	56	57
39
																																												58
59			60			61			62			63			64			65			66			67			68		69				70		71						72	73	74
75				76			77			78			79			80			81			82			83									86					87		88	89	90
																												84			85
																																												91
92					93												94												95							96					100
																																						97	98	99			101

Figure C-3. U.S. English (101-Key) Keyboard Key Positions

1				2				3		4			5					6		7				8			9			10				11		12		13	14	15	16
17	18			19			20			21			22			23			24			25			26			27			28			29			31		32	33	34	35	36	37	38
			40			41			42			43			44			45			46			47			48			49			50		51				52	53	54	55	56	57
39
																																						71							58
59				60			61			62			63			64			65			66			67									70								72	73	74
																												68		69						103
75		104			76			77			78			79			80			81			82			83			84			85			86					87		88	89	90
92						93												94												95							96		97	98	99	100		101	91

Figure C-4. National (102-Key) Keyboard Key Positions

C-4 361834-002 Technical Reference Guide