Compaq 305 specifications System I/O Address

Presario 305 Model

Before You Begin	Specifications	Parts Catalog
Removal Sequence	Troubleshooting	Battery Operations
		Index
Product Description	Pin Assignments

Specifications (continued)

Physical and environmental	System Interrupts	System DMA
System I/O Address	System Memory Catalog	Display
Diskette Drive	Hard Drive	CD Drive
	Battery Pack

	System I/O Address
I/O Address (Hex)	System Function (Shipping Configuration)
000h-00Fh	Direct memory access controller
010h-01Fh	Unused
020h-021h	Programmable interrupt Controller
022h-024Fh	Opti Chipset Configuration registers
025h-03F	Unused
02E-02F	87334 Super IO configuration for CPU
040h-043h	Counter/Timer Registers
044h-05Fh	Unused
060h-060h	Keyboard Controller
061h-061h	Port B
062h-063h	Unused
064h-064h	Keyboard Controller
065h-06Fh	Unused
070h-071h	NMI Enable/Real Time Clock
072h-07F	Unused
080h-08F	DMA Page Registers
090h-091	Unused
092h-092h	Port A
093h-09F	Unused
0A0h-0A1h	Interrupt controller no. 2
0A2h-0BFh	Unused
0C0h-0DFh	DMA Controller no. 2
0E0h-0EFh	Unused
0F0h-0F1	Coprocessor Busy Clear/Reset
0F2h-0FF	Unused
100h-16F	Unused
170h-177	Secondary Fixed Disk Controller
178h-1EF	Unused
1F0h-1F7	Primary Fixed Disk Controller
1F8h-200	Unused
201h-201	Joystick (Decoded in ESS 1688)
202h-21F	Unused
220h-22F	Entertainment Audio
230h-26D	Unused
278h-27F	Unused
280h-2AB	Unused
2A8h-2E7	Unused
2E8h-2EF	Reserved Serial Port
2F0h-2F7	Unused
2F8h-2FF	Infrared Port
320h-36F	Unused
378h-37F	Parallel Port (LPT1/Default)
380h-387	Unused
388h-38B	FM Synthesizer - OPL3
38Ch-3AF	Unused
3B0h-3BB	VGA
3BCh-3BF	Reserved (Parallel Port/No EPP Support)
3C0h-3DF	VGA
3E0h-3E1	PC Card Controller in CPU
3E8h-3EF	Internal Modem
3F0h-3F7	"A" Diskette Controller
3F8h-3FF	Serial Port (COM1/Default)
CF8h-CFB	PCI Configuration Index Register (PCIDIVO-1)
CFCh-CFF	PCI Configuration Index Register (PCIDIVO-1)

System Memory Catalog

Size	Memory Address	System Function
640K	00000000h-	Base Memory
	0009FFFFh
128K	000A0000h-	Video Memory
	000BFFFFh
48K	000C0000h-	Video BIOS
	000CBFFFh
160K	000C8000h-	Unused
	000E7FFFh
64K	000E8000h-	System BIOS
	000FFFFFh
15M	00100000h-	Extended Memory
	00FFFFFFh
58M	00100000h-	Super Extended Memory
	047FFFFFh
58M	04800000h-	Unused
	07FFFFFFh
2M	08000000h-	Video Memory (Direct Access)
	080FFFFFh
4G	08200000h-	Unused
	FFFEFFFFh
64K	FFFF0000h-	System BIOS
	FFFFFFFFh

11.3-Inch Color TFT Display

Model		Sharp		Sanyo
	U.S.	Metric	U.S.	Metric
Display Dimensions	.22 in	5.7 mm		5.7 mm
Height			.22 in
Width	9.93 in	252.4 mm	9.80 in	249.0 mm
Depth	7.32 in	186.0 mm	7.35 in	186.7 mm
Weight	0.61 lb	307 g	.76 lb	380 g
Contrast Ratio		<200		<200
Brightness	120 to 130 nit AC only/80 on battery		120 to 130 nit AC only/80 on battery
Total Power Consumption		2.3 W		2.3 W
Refresh		800 x 600		800 x 600