compaq presario 1500 series User Manual

Specifications
Maintenance and Service Guide6–9
Ta b l e  6 - 6
Diskette Drive
Diskette size3.5 inch
Activity indicatorOn system
Height12.7 mm (0.5 in)
Bytes per sector512
Sectors per track
High density
Low density18 (1.44 MB)
9
Tracks per side
High density
Low density80
80
Read/write heads2
Average seek times
Track-to-track (high/low)
Average (high/low)
Settling time
Latency average3 to 6 ms
95 to 174 ms
15 ms
100 ms
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6–10Maintenance and Service Guide
Specifications
Table 6-7
DVD-ROM Drive
Applicable diskDVD-5, DVD-9, DVD-10
CD-ROM (Mode 1 and 2)
CD Digital Audio
CD-XA ready (Mode 2, Form 1 and 2)
CD-I ready (Mode 2, Form 1 and 2)
CD-R (read only)
CD Plus
Photo CD (single/multisession)
CD-Bridge
Center hole diameter1.5 cm .59 in
Disk diameter12 cm, 8 cm
Disk thickness1.2 mm .047 in
Tr a c k  p i t c h.74 µm
Access time (typical reads, including setting)
Random (DVD media)
Full stroke (DVD media)
Random (CD media)
Full...

Specifications
Maintenance and Service Guide6–11
Table 6-8
DVD-RW Drive
Applicable diskDVD-5, DVD-9, DVD-10
CD-ROM (Mode 1 and 2)
CD Digital Audio
CD-XA ready (Mode 2, Form 1 and 2)
CD-I ready (Mode 2, Form 1 and 2)
CD-R (read only)
CD Plus
Photo CD (single/multisession)
CD-Bridge
Center hole diameter1.5 cm .59 in
Disk diameter12 cm, 8 cm
Disk thickness1.2 mm .047 in
Tr a c k  p i t c h1.60 µm
Access time
Random
Full stroke< 120 ms
< 175 ms
Audio output levelLine-out, 0.7 to 0.9 Vrms
Cache buffer2 MB...

6–12Maintenance and Service Guide
Specifications
Table 6-9
CD-ROM Drive
Applicable diskCD-ROM (Mode 1, 2, and 3)
CD-XA ready (Mode 2, Form 1 and 2)
CD-I ready (Mode 2, Form 1 and 2)
CD-R (read only)
CD Plus
Photo CD (single/multisession)
CD-Extra
Video CD
CD-WO (fixed packets only)
CD-Bridge
Center hole diameter1.5 cm .59 in
Disk diameter12 cm, 8 cm
Disk thickness1.2 mm .047 in
Tr a c k  p i t c h1.6 µm
Access time
Random
Full stroke< 150 ms
< 300 ms
Cache buffer128 KB
Data transfer rate
Sustained, 16X...

Specifications
Maintenance and Service Guide6–13
Table 6-10
CD-RW Drive
Center hole diameter1.5 cm .59 in
Disk diameter12 cm, 8 cm
Disk thickness1.2 mm .047 in
Tr a c k  p i t c h.74 µm
Access time
Random
Full stroke< 150 ms
< 225 ms
Audio output levelLine-out, 0.7 Vrms
Cache buffer128 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
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6–14Maintenance and Service Guide
Specifications
Table 6-11
External AC Adapter
Weight.85 lb .39 kg
Power supply
Operating watts
Operating voltage
Operating current
Operating frequency range90 W
110 to 240 VAC RMS
1.5 A RMS
50 to 60 Hz AC
Table 6-12
8-cell, Li ion Battery Pack
Dimensions
Length
Width
Depth
Weight12.57 cm
8.79 cm
2.03 cm
.44 kg4.95 in
3.46 in
0.80 in
0.96 lb
Energy
Vo l t a g e
Amp-hour capacity
Watt-hour capacity14.8 V
minimum 3.7 Ah, typical 3.9 Ah
minimum 53.2 Ah, typical 56.1 Ah
Te m...

Specifications
Maintenance and Service Guide6–15
Table 6-13
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.
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6–16Maintenance and Service Guide
Specifications
Table 6-14
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...

Specifications
Maintenance and Service Guide6–17
Table 6-15
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...

6–18Maintenance and Service Guide
Specifications
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 Unused...