Acer Extensa 390 Service Guide

System Introduction1-9 1.4 Hardware Configuration and Specification
1.4.1 Memory Address Map
Table 1-3Memory Address MapAddress RangeDefinitionFunction000000 - 09FFFF640 KB memoryBase memory0A0000 - 0BFFFF128 KB video RAMReserved for graphics display buffer0C0000 - 0CBFFFVideo BIOSVideo BIOS0F0000 - 0FFFFF64 KB system BIOSSystem BIOS100000 - top limitedExtended memorySIMM memoryFE0000 - FFFFFF256 KB system ROMDuplicate of code assignment at 0E0000-0FFFFF1.4.2 Interrupt Channel Map
Table 1-4Interrupt...

1-10Service Guide1.4.3 DMA Channel Map
Table 1-5DMA Channel MapControllerChannelAddressFunction1
1
1
1
2
2
2
20
1
2
3
4
5
6
70087
0083
0081
0082
Cascade
008B
0089
008AAudio (option) / Audio
Audio (option) / ECP / Audio / FIR
Diskette
Audio (option) / ECP / FIR
Cascade
Not support
Not support
Not support / Audio1.4.4 I/O Address Map
Table 1-6I/O Address MapAddress RangeDevice000 - 00F
020 - 021
040 - 043
048 - 04B
060 - 06E
070 - 071
080 - 08F
0A0 - 0A1
0C0 - 0DF
1F0 - 1F7
220 - 22F
230 - 23F
240 - 24F...

System Introduction1-11 1.4.5 Processor
Table 1-7Processor SpecificationsItemSpecificationCPU typeP55C-133/150/166CPU packageTCPSwitchable processor speed (Y/N)YesMinimum working speed0MHzCPU core voltage2.0V/2.45V/1.8VCPU I/O voltage2.5V/3.3V/2.5V1.4.6 BIOS
Table 1-8BIOS SpecificationsItemSpecificationBIOS vendorAcerBIOS versionV3.0BIOS in flash EPROM (Y/N)YesBIOS ROM size256KBBIOS package type32-pin PLCCSame BIOS for STN color/TFT color (Y/N)YesThe BIOS can be overwritten/upgradeable using the “AFLASH”...

1-12Service Guide· 16MB (2M*8x8)
· 32MB (4M*16x4)
· 64MB (8M*8x8)
· Expansion RAM module speed/voltage/package: 60ns/3.3v/TSOP EDO
· EDO and fast-page mode DIMMs may be used together in a memory configuration.
The following table lists all possible memory configurations.
Table 1-9Memory ConfigurationsSlot 1Slot 2Total Memory8 MB0 MB8 MB0 MB8 MB8 MB8 MB8 MB16 MB16 MB0 MB16 MB0 MB16 MB16 MB16 MB8 MB24 MB8 MB16 MB24 MB16 MB16 MB32 MB32 MB0 MB32 MB0 MB32 MB32 MB32 MB8 MB40 MB8 MB32 MB40 MB32 MB16 MB48 MB16...

System Introduction1-13 1.4.9 Video Memory
Table 1-10Video RAM ConfigurationItemSpecificationDRAM or VRAMDRAM(EDO type)Fixed or upgradeableFixedMemory size/configuration2MB (256K x 16 x 4pcs)Memory speed50nsMemory voltage3.3VMemory packageTSOP1.4.10 Video
Table 1-11Video Hardware SpecificationItemSpecificationVideo chipC&T65555Working voltage3.3V1.4.10.1 External CRT Resolution Support
Table 1-12Supported External CRT ResolutionsResolution x Color onExternal CRTCRT Refresh RateSimultaneous onTFT...

1-14Service Guide1.4.10.2 LCD Resolution Support
Table 1-13Supported LCD ResolutionsResolution x Color on LCD OnlyTFT LCD (SVGA)DSTN LCD (SVGA)640x480x16YY640x480x256YY640x480x65,536YY640x480x16,777,216YY800x600x16YY800x600x256YY800x600x65,536YY800x600x16777216YY1024x768x16YY1024x768x256YY1024x768x65536YY1280x1024x16YY1280x1024x256YY· Maximum resolution (External CRT): 1280x1024Using software, you can set the LCD to a higher resolution than its physical
resolution, but the image shown on the LCD will...

System Introduction1-15 1.4.12 Serial Port
Table 1-15Serial Port ConfigurationsItemSpecificationNumber of serial ports116550 UART supportYesConnector type9-pin D-typeLocationRear sideSelectable serial port (by BIOS Setup)· Serial 1 (3F8h, IRQ4)
· Serial 2 (2F8h, IRQ3)
· Disable1.4.13 Audio
Table 1-16Audio SpecificationsItemSpecificationChipsetYMF715Audio onboard or optionalBuilt-inMono or stereoStereoResolution16-bitCompatibilitySB-16 , Windows Sound SystemMixed sound sourcesVoice, Synthesizer, Line-in,...

1-16Service GuideTable 1-17PCMCIA SpecificationsItemSpecificationChipsetTI 1250ASupported card typeType-II / Type-IIINumber of slotsTwo Type-II or one Type-IIIAccess locationLeft sideZV (Zoomed Video) port supportYes1.4.15 Touchpad
Table 1-18Touchpad SpecificationsItemSpecificationVendor & model nameSynaptics TM3202TPD-226Power supply voltage (V)5 ± 10%LocationPalm-rest centerInternal & external pointing device work simultaneouslyYesSupport external pointing device hot plugYesX/Y position resolution...

System Introduction1-17 1.4.16.1 Windows 95 Keys
The keyboard has two keys that perform Windows 95-specific functions.  See Table 1-26.
Table 1-20Windows 95 Key DescriptionsKeyDescriptionWindows logo keyStart button.  Combinations with this key performs special functions, e.g.:
· Windows + Tab   Activate next Taskbar button
· Windows + E   Explore My Computer
· Windows + F   Find Document
· Windows + M   Minimize All
· Shift + Windows + M   Undo Minimize All
· Windows + R   Display Run dialog...

1-18Service Guide1.4.18 HDD
Table 1-22HDD SpecificationsItemSpecificationVendor & Model NameHitachi DK225A-21IBM DTNA22160IBM DDLA21620Drive FormatCapacity (MB)216021601620Bytes per sector512512512Logical heads161616Logical sectors636363Logical cylinders488942003152Physical read/write heads663Disks332Spindle speed (RPM)446440004000Performance SpecificationsBuffer size (KB)1289696InterfaceATA-3(IDE)ATA-2ATA-2Data transfer rate
(disk-buffer, Mbytes/s)5.7 ~ 9.05 ~ 7.75 ~ 8.3Data transfer rate
(host-buffer,...