Acer Aspire 5538 Service Guide

171Chapter 4
DLL Timing Control Registers, RCOMP settings
Post CodeDescription
0x27 Enable DRAM Channel I/O Buffers
0x28 Enable all clocks on populated rows
0x29 Perform JEDEC memory initialization for all memory rows
0x30 Perform steps required after memory init
0x31 Program DRAM throttling and throttling event registers
0x32 Setup DRAM control register for normal operation and enable
0x33 Enable RCOMP
0x34 Clear DRAM initialization bit in the SB
0x35 Initialization Sequence Completed, program graphic...

Chapter 4172
BDS & Specific action:
Each PEIM entry point used in 80_PORT
Post CodeDescription
0x00 Report the legacy boot is happening
0x12 Wake up the Aps
0x13 Initialize SMM Private Data and relocate BSP SMBASE
0x21 PC init begin at the stage1
0x27 Report every memory range do the hard ware ECC init
0x28 Report status code of every memory range
0x50 Get the root bridge handle
0x51 Notify pci bus driver starts to program the resource
0x58 Reset the host controller
0x5A IdeBus begin initialization
0x79...

173Chapter 4
Each Driver entry point used in 80_PORT0xA8 PEI_SB_INIT
0x0C PEI_CAPSULE
0xAA PEI_PLATFORM_STAGE2
0xAC PEI_SB_SMBUS_ARP_DISABLED
0x0F PEI_HOST_TO_SYSTEM
0x40 PEI_MEMORY_INIT
0x41 PEI_S3_RESUME
0xAD PEI_CLOCK_GEN
0xAB PEI_OP_PRESENCE
0xAE PEI_FIND_FV
0x16 PEI_H2O_DEBUG_IO
0x17 PEI_H2O_DEBUG_COMM
0x16~0x1F PEI_RESERVED
0x20~0x2E PEI_OEM_DEFINED
0xAF PEI_DXE_IPL
Post CodeDescription
0x30 RESERVED
0xB6 DXE_CRC32_SECTION_EXTRACT
0xB8 SCRIPT_SAVE
0xB9 ACPI_S3_SAVE
0xBA SMART_TIMER
0xBB...

Chapter 4174
0xDB SATA_CONTROLLER
0xDD SB_SM_BUS
0xE7 ISA_ACPI_DRIVER
0xE8 ISA_BUS
0xE9 ISA_SERIAL
0xED BUS_PCI_UNDI
0xEC PCI_BUS
0xF6 BOOT_PRIORITY
0xF7 FVB_SERVICE
0xF8 ACPI_PLATFORM
0xFB PCI_HOT_PLUG
0xFC DXE_PLATFORM
0xFD PLATFORM_IDE
0x97 SMBIOS
0x98 MEMORY_SUB_CLASS
0x99 MISC_SUB_CLASS
0x82 CON_PLATFORM
0x83 SAVE_MEMORY_CONFIG
0x84 ACPI_SUPPORT
0x85 CON_SPLITTER_UGA_VGA / CON_SPLITTER
0x88 VGA_CLASS
0x89 DATA_HUB
0x60 DISK_IO
0x8B MEMORY_TEST
0x62 CRISIS_RECOVERY
0x8D LEGACY_8259
0x8E...

175Chapter 4
Each SmmDriver entry point used in 80_PORT0x87 TERMINAL
0x8A DATA_HUB_STD_ERR
0x7C FAT
0x7D PARTITION
0x7E ENGLISH
0x7F FRENCH
0x9E HII_DATABASE
0x9F OEM_SETUP_BROWSER
0x8C OEM_BADGING_SUPPORT
0xF9 SETUP_MOUSE
0x72 MONITOR_KEY
0xBD PLATFORM_BDS
0x8D RESERVED
0x8E RESERVED
0x8F RESERVED
0xA0 DXE_H2O_DEBUG_IO
0xB3 DXE_TPM_TCG
0xB4 DXE_TPM_PHYSICAL_PRESENCE
0xB7 DXE_OEM_SERVICE
0x9B DXE_ SECURITY_HDD_PASSWORD_SERVICE
0xA9 DXE_LAN_IDER_CONTROLLER
0x9C DXE_ SECURITY_SYSTEM_PASSWORD_SERVICE
0x9D...

Chapter 4176
0x92 SMM_IHISI
0x93 SMM_INT15_MICROCODE
0x94 SMM_PNP
0x95 SMM_INIT_PPM
0xD3 SMM_OEM_SERVICE
Post CodeDescription 

Chapter 5177
Jumper and Connector Locations
Top View
ITEMDESCRIPTIONITEMDESCRIPTION
JP2 Connect to IO/B (FFC) U61 Side-port memory (for UMA)
JP3 Connect to CAP/B (FFC) U65 / U68 VRAM (for DIS)
JP4 Connect to Bluetooth (Cable) LED9 
LED10
LED11
LED12Battery Charging Indicator
LED10 / LED12 AMB
LED9 / LED11?Blue JP7 Connect to Touch pad (FFC)
JP8 Connect to Keyboard 
JP9 Connect to Power BTN board 
(FFC)JP21 Connect to IO/B (Cable)
JP19 Connect to Digital MIC  PBJ1 RTC battery
JP20 Connect to speaker...

178Chapter 5
Bottom View
ITEMDESCRIPTIONITEMDESCRIPTION
PJP1 Connect to Battery JREAD1 Card reader
PJP2 DC-IN jack JCRT1 CRT Connector
JDIM1 / 
JDIM2DDR2 Memory socket JHDMI1 HDMI Connector
JLVDS1 Connect to LED Panel JP13 FAN Connector
JSATA1 Connect to SATA ODD
JSATA2 Connect to SATA HDD JCPU1 CPU socket
JMINI1 Connect to WLAN  U3 NB
JMINI2 Reserved U14 SB
JUSB1 / 
JUSB2USB Connector U64 M92-S2LP VGA
JMIC1 Connect to external 
microphone U66 / U67 VRAM (for DIS)
JHP1 Connect to external SPDIF 

Chapter 5179
Clearing Password Check and BIOS Recovery
This section provide you the standard operating procedures of clearing password and BIOS recovery for 
Aspire 5538. Aspire 5538 provides one Hardware Open Gap on main board for clearing password check, and 
one Hotkey for enabling BIOS Recovery.
Clearing Password Check
Hardware Open Gap Description
Steps for Clearing BIOS Password Check
If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask 
the...

180Chapter 5
BIOS Recovery by Crisis Disk
BIOS Recovery Boot Block:
BIOS Recovery Boot Block is a special block of BIOS. It is used to boot up the system with minimum BIOS 
initialization. Users can enable this feature to restore the BIOS firmware to a successful one once the previous 
BIOS flashing process failed.
BIOS Recovery Hotkey:
The system provides a function hotkey: Fn+Esc, for enable BIOS Recovery process when system is powered 
on during BIOS POST. To use this function, it is strongly...