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Setting the Fast Boot Option, Setting the System and Video BIOS Options, C400h-C7FFFh

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System Utilities Setting the Fast Boot Option Enabling the Fast boot option allows the power-on diagnostic testing to skip certain system memory tests. The default is Disabled. Setting the System and Video BIOS Options The computer's shadow RAM feature copies the contents of the system and video BIOS ROM (and any external BIOS ROM installed) into RAM so the computer can perform certain operations faster. The computer enables shadow RAM automatically. However, there are two SETUP options to control the memory addresses the computer uses for shadow RAM: On-board video BIOS location at and Shadow RAM areas. The default setting of the video BIOS ROM is memory address C000h, which allows the computer to use AT-compatible software. For PS/2-compatible software, change the On-board video BIOS located at address to E000h. To exclude certain portions of RAM (up to 12,16KB address areas) from being used for Shadow RAM areas, press the End key to go to the bottom of the options menu. Then enable or disable shadow RAM in these address ranges: cl *C000h-C3FFFh cl *C400h-C7FFFh cl *CS00h-CBFFFh cl *CC00h-CFFFFh P D000h-D3EEFh 0 D400h-D7FFFh cl D800h-DBFFFh cl DC00h-DFFFFh cl E000h-E3FFFh cl E400h-E7FFFh cl E800h-EBFFFh cl EC00h-EFFFFh. * These four addresses default to enabled. If you attempt to change the setting the following message appears: Warning! On-board video BIOS must be shadowed - enabling at C000 The default setting for all these address areas is Enabled. To disable shadow RAM at an address, select the area and press Enter then press or to change the setting to Disabled. Epson NX Service Manual B-7

Section	Page
FRONT MATTER	1
CHAP 1-SYSTEM DESCRIPTION	6
System Overview	8
General Features	9
Options	12
Upgrades	12
Document Sources	13
Emissions and Safety Agency Information	13
Environmental Specifications	14
Subassembly Descriptions	15
Case	16
System Board	16
Connectors and Jumpers	18
Power Supply	20
Memory	22
CMOS RAM	23
Mass Storage	25
Keyboard	29
CHAP 2-TROUBLESHOOTING	30
General Information	32
Recommended Service Tools	32
Epson Authorized Replacement Modules	33
Power-On Diagnostics and Boot Errors	34
Error Beep Codes	37
General System Problems	38
Power or Lock-up Problems	38
Keyboard Problems	40
Video Problems	41
Diskette Drive Problems	43
Hard Disk Problems	44
System Software Problems	45
Parallel Printer Problems	46
Serial Port Problems	47
Option Card Problems	48
Memory Module Problems	49
Mouse Problems	50
Troubleshooting with the NeXTSTEP Operating System	51
CHAP 3-REMOVING AND REPLACING SUBASSEMBLIES	52
General Service Information	54
System Unit	55
Removing the Cover	55
Replacing the Cover	57
Removing an Option Card	58
Removing the Option Slot Cover	59
Replacing the Option Slot Cover	59
Installing an Option Card	60
System Unit	61
Removing the Option Card Riser Board	61
Replacing the Option Card Riser Board	61
Removing SlMMs	62
Installing SlMMs	63
Installing Another Processor	64
Removing a Drive From the Horizontal Position	65
Installing a Drive In the Horizontal Position	66
Removing a Hard Disk Drive From the Vertical Position	68
Installing a Hard Disk Drive In the Vertical Position	69
Removing the Power Supply	70
Reinstalling the Power Supply	71
Removing the Speaker	72
Replacing the Speaker	72
Removing the LEDs	73
Replacing the LEDs	73
Removing the BIOS EPROMs	74
Replacing the BIOS EPROMs	74
Removing the System Board	75
Replacing the System Board	76
Removing the Front Bezel	76
Replacing the Front Bezel	77
APPENDIX A-REFERENCE MATERIALS	78
Hard Disk Drive Types	80
System l/O Address Map	82
DMA Assignments	84
Hardware Interrupts	85
Connector Pin Assignments	86
Auxiliary Fan Connector	86
VGA Port Connector	86
Speaker Connector	87
Serial Port Connectors	87
Parallel Port Connector	88
IDE Hard Disk Drive Data Connector	89
Diskette Drive Data Connector	90
Keyboard and Mouse Connectors	91
Battery Connector	92
Reset Connector	92
Power Supply Connectors	93
Option Card Riser Board Connector	93
HDD Access LED Connector	95
Power (SPEED) LED Connector	95
VGA Feature Connector	96
Option Slot Connectors	97
Drive Power Connectors	98
Intel Ether Express 16C	98
SMC Ether Card PLUS Elite16 Combo	99
Adaptec AHA- 1504B	100
List of Abbreviations	103
APPNEDIX B-SYSTEM UTILITIES	105
Running the SETUP Program	107
Starting the SETUP Program Stored in ROM	108
The SETUP Screens	108
Setting the Date and Time	110
Setting the Processor Speed Options	112
Setting the Fast Boot Option	113
Setting the System and Video BIOS Options	113
Setting the Keyboard Options	114
Installed Equipment	114
Setting the Built-in l/O Port Options	115
Setting the Port Configuration	116
Network Server and Password Status	116
Installed Diskette Drive(s)	117
Installed Hard Disk Drive(s)	117
Hard Disk Drive Types	117
Setting the Non-cache Areas	119
Setting the Cache Test and User Control Options	120
Setting the High Vertical Refresh Rate	120
Saving Your Settings	120
Performing System Diagnostics	121
Starting the System Diagnostics Program	122
Running Tests	125
Resuming From an Error	126
System Diagnostics Tests	127
Error Messages	128
Formatting a Hard Disk	130
Starting the Program	130
Option 1, Format	132
Option 2, Destructive Surface Analysis	135
Option 3, Non-destructive Surface Analysis	136
Exiting the Program	136
Additional Utilities	137
Changing the Processor Speed	137
Preparing the Hard Disk for Moving	137
APPENDIX C-SCHEMATICS	138
CPU Circuitry	139
Video Circuitry (Part 1)	140
System and Virtual Cache Controller Circuitry	141
Peripheral and I/O Controller Circuitry	142
SIMM and Memory Circuitry	143
Wingine and Virtual Memory Controller Circuitry	144
VGA Feature Circuitry	145
Keyboard/Mouse Controller Circuitry	146
Riser Board Connector Circuitry	147
Power Supply and Reset Circuitry	148
Supplemental PAL Circuitry	149
Video Circuitry (Part 2)	150