compaq evo n115 User Manual

6–10Maintenance and Service Guide
Specifications
Table 6-7
CD-RW Drive
Center hole diameter .59 in .39 cm
Disk diameter 12 cm, 8 cm
Disk thickness .47 in .12 cm
Tr a c k  p i t c h .74 µm
Access time Random
Full stroke < 150 ms
< 225 ms
Audio output level Line-out, 0.7 Vrms
Cache buffer 128 KB
Data transfer rate
Sustained, 16X
Sustained, 4X CD-RW
Normal PIO Mode 4 (single burst) 150 KB/s
5,520 KB/s
16.6 MB/s
Startup time < 15 seconds
Stop time < 6 seconds
263816m1.book  Page 10  Friday, January 25, 2002...

Specifications
Maintenance and Service Guide 6–11
Table 6-8
External AC Adapter
Weight.45 lb .21 kg
Power supply  (input)
Operating voltage
Operating current
Operating frequency range
Maximum transient 100 to 240 VAC RMS nominal
1.5 A RMS
50 to 60 Hz AC nominal
4/50 kV
Table 6-9
8-cell, Li ion Battery Pack
Dimensions
Height
Width
Depth
Weight 0.82 in
5.67 in
3.03 in
.94 lb21 mml
144 mm
77 mm
.43 kg
Energy 4.0 Amp hourVo l t a g e
Amp-hour capacity
Watt-hour capacity
3.6 Amp hour Vo l t a g e
Amp-hour...

6–12Maintenance and Service Guide
Specifications
Table 6-10
System DMA
Hardware DMA System Function
DMA0 Available for audio
DMA1 Entertainment audio
(default; alternate = DMA0, DMA3, none)
DMA2 Diskette drive
DMA3 ECP parallel port LPT1 (default; alternate = DMA0, none)
DMA4 DMA controller cascading (not available)
DMA5 Available for PC Card
DMA6 Not assigned
DMA7 Not assigned
✎PC Card controller can use DMA 1, 2, or 5.
263816m1.book  Page 12  Friday, January 25, 2002  2:14 PM 

Specifications
Maintenance and Service Guide 6–13
Table 6-11
System Interrupts
Hardware IRQ System Function
IRQ0 System timer
IRQ1 Keyboard controller
IRQ2 Cascaded
IRQ3 COM2
IRQ4 COM1
IRQ5 Audio (default)*
IRQ6 Diskette drive
IRQ7 Parallel port
IRQ8 Real time clock (RTC)
IRQ9 Infrared
IRQ10 System use
IRQ11 System use
IRQ12 Internal point stick or external mouse
IRQ13 Coprocessor (not available to any peripheral)
IRQ14 IDE interface (hard drive and optical drive)
IRQ15 System use
✎PC Cards may assert...

6–14Maintenance and Service Guide
Specifications
Table 6-12
System I/O Addresses
I/O Address  (hex)System Function  (shipping configuration)
000 - 00F DMA controller no. 1
010 - 01F Unused
020 - 021 Interrupt controller no. 1
022 - 024 Opti chipset configuration registers
025 - 03F Unused
02E - 02F 87334 “Super IO” configuration for CPU
040 - 05F Counter/timer registers
044 - 05F Unused
060 Keyboard controller
061 Port B
062 - 063 Unused
064 Keyboard controller
065 - 06F Unused
070 - 071 NMI enable/real...

Specifications
Maintenance and Service Guide 6–15
I/O Address (hex)System Function  (shipping configuration)
0A2 - 0BF Unused
0C0 - 0DF DMA controller no. 2
0E0 - 0EF Unused
0F0 - 0F1 Coprocessor busy clear/reset
0F2 - 0FF Unused
100 - 16F Unused
170 - 177 Secondary fixed disk controller
178 - 1EF Unused
1F0 - 1F7 Primary fixed disk controller
1F8 - 200 Unused
201 Joystick (decoded in ESS1688)
202 - 21F Unused
220 - 22F Entertainment audio
230 - 26D Unused
26E - 26 Unused
278 - 27F Unused
280 - 2AB...

6–16Maintenance and Service Guide
Specifications
I/O Address  (hex)System Function  (shipping configuration)
2F0 - 2F7 Unused
2F8 - 2FF Infrared port
300 - 31F Unused
320 - 36F Unused
370 - 377 Secondary diskette drive controller
378 - 37F Parallel port (LPT1/default)
380 - 387 Unused
388 - 38B FM synthesizer - OPL3
38C - 3AF Unused
3B0 - 3BB VGA
3BC - 3BF Reserved (parallel port/no EPP support)
3C0 - 3DF VGA
3E0 - 3E1 PC Card controller in CPU
3E2 - 3E3 Unused
3E8 - 3EF Internal modem
3F0 - 3F7 “A”...

Specifications
Maintenance and Service Guide 6–17
Table 6-13
System Memory Map
Size Memory Address System Function
640 KB 00000000 - 0009FFFF Base memory
128 KB 000A0000 - 000BFFFF Video memory
48 KB 000C0000 - 000CBFFF Video BIOS
160 KB 000C8000 - 000E7FFF Unused
64 KB 000E8000 - 000FFFFF System BIOS
15 MB 00100000 - 00FFFFFF Extended memory
58 MB 01000000 - 047FFFFF Super extended memory
58 MB 04800000 - 07FFFFFF Unused
2 MB 08000000 - 080FFFFF Video memory (direct access)
4 GB 08200000 - FFFEFFFF...

Maintenance and Service Guide A–1
A
Connector Pin Assignments
Ta b l e  A - 1
RJ-45 Network Interface
Pin Signal Pin Signal
1 Transmit + 5 Unused
2 Transmit - 6 Receive -
3 Receive + 7 Unused
4Unused 8Unused
263816m1.book  Page 1  Friday, January 25, 2002  2:14 PM 

A–2Maintenance and Service Guide
Connector Pin Assignments
Ta b l e  A - 2
RJ-11 Modem
Pin Signal Pin Signal
1Unused 4Unused
2 Tip 5 Unused
3Ring 6Unused
Ta b l e  A - 3
Universal Serial Bus
Pin Signal Pin Signal
1 +5 VDC 3 Data +
2 Data - 4 Ground
263816m1.book  Page 2  Friday, January 25, 2002  2:14 PM