American Megatrends Super Voyager PCI-II User manual

American Megatrends, Inc.
Super Voyager PCI-II
486 ISA Motherboard
User's Guide
MAN-724
4/21/95

© Copyright 1995 American Megatrends, Inc.
All rights reserved.
American Megatrends, Inc.
6145F Northbelt Parkway
Norcross, GA 30071
This publication contains proprietary information which is protected by copyright. No part of this publication may be reproduced, transcribed,
stored in a retrieval system, translated into any language or computer language, or transmitted in any form whatsoever without the prior written
consent of the publisher, American Megatrends, Inc.
Limited Warranty
Buyer agrees if this product proves to be defective, that American Megatrends, Inc. is only obligated to replace or refund the purchase price of
this product at American Megatrends' discretion according to the terms and conditions on the motherboard warranty card. American Megatrends
shall not be liable in tort or contract for any loss or damage, direct, incidental or consequential. Please see the Warranty Registration Card
shipped with this product for full warranty details.
Limitations of Liability
In no event shall American Megatrends be held liable for any loss, expenses, or damages of any kind whatsoever, whether direct, indirect,
incidental, or consequential, arising from the design or use of this product or the support materials provided with the product.
Trademarks
Intel is a registered trademark of Intel Corporation.
MS-DOS, Xenix, and Microsoft are registered trademarks of Microsoft Corporation. Microsoft Windows and Windows NT are trademarks of Microsoft Corporation.
IBM, AT, VGA, PS/2, OS/2, and EGA are registered trademarks of International Business Machines Corporation. XT and CGA are trademarks of International Business Machines Corporation.
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Revision History
4/21/95 Initial release.

Super Voyager PCI-II 486 ISA Motherboard User's Guide
iii
Table of Contents
1 System Overview.......................................................................................................................................... 1
2 Installation .................................................................................................................................................... 9
Unpacking the Motherboard ......................................................................................................................... 9
Installation Steps.......................................................................................................................................... 11
Step 1 Set Jumpers......................................................................................................................... 12
Step 2 Install Memory ................................................................................................................... 21
Step 3 Install Upgrade CPU........................................................................................................... 24
Step 4 Install the Motherboard ...................................................................................................... 26
Step 5 Connect the Power Supply.................................................................................................. 27
Step 6 Connect the Keyboard Cable.............................................................................................. 28
Step 7 Connect Cables................................................................................................................... 29
Step 8 Connect the PS/2 Mouse Cable .......................................................................................... 31
Step 9 Connect Onboard I/O.......................................................................................................... 31
Step 10 Install Floppy Drive.......................................................................................................... 32
Step 11 Install Hard Disk............................................................................................................... 33
Step 12 Install Adapter Cards........................................................................................................ 34
Step 13 Test and Configure ........................................................................................................... 34
3 AMIBIOS and WINBIOS............................................................................................................................ 37
Standard Setup............................................................................................................................................. 38
Advanced Setup ........................................................................................................................................... 39
Chipset Setup............................................................................................................................................... 42
Power Management Setup............................................................................................................................ 45
Peripheral Setup........................................................................................................................................... 48
4 Flash Programming ................................................................................................................................................. 53
A Upgrading Cache Memory........................................................................................................................... 55
Index .......................................................................................................................................................................... 57
Preface
Technical Support
If an American Megatrends motherboard fails to operate as described or you are in doubt about a configuration
option, please call technical support at 770-246-8645.

Super Voyager PCI-II 486 ISA Motherboard User's Guide
1
1 System Overview
The American Megatrends Super Voyager PCI-II 486 ISA motherboard has:
• 486or upgrade CPU operating at up to 100 Mhz internally and 25 or 33 Mhz externally,
• Four ISA expansion slots, and
• three PCI expansion slots.
The motherboard conforms to the PCI Version 2.0 specification and uses the PCI local bus. IDE modes 0,
1, 2, 3 and 4 are supported on the PCI local bus. Up to four IDE drives can be connected to the
motherboard. The PCI slots operate synchronously with the CPU clock. The PCI bus frequency assignments
are:
CPU Internal Clock Frequency PCI Expansion Slots
Frequency
100, 66, or 33 MHz 33 MHz
75, 50, or 25 MHz 25 MHz
The PCI bus frequency depends on the frequency of the CPU that is installed.
The PCI expansion slots are automatically configured by the onboard American Megatrends WINBIOS
system BIOS.
Motherboard Dimensions
The Super Voyager PCI-II 486 ISA motherboard is approximately 8½ inches wide by 10.3 inches long (the
mini Baby AT® motherboard size with similar mounting holes).
External CPU Speed
The Super Voyager PCI-II 486 ISA motherboard supports external CPU speeds of 25 MHz and 33 MHz.
The PCI bus is synchronous and runs at the same speed as the CPU external clock.

Chapter 1 System Overview
2
Overview, Continued
Green PC Support
The Super Voyager PCI II motherboard includes support for monitor blanking on Green PC monitors and
IDE hard disk drive spin down. The motherboard supplies a TTL output to control Green PC power
supplies. The System Management Interrupt (SMI) and CPU Halt are supported. This motherboard
compiles with the APM (Advanced Power Management) V1.1 specifications.
Processor Type and Speed
A variety of 486 and 486 overdrive CPUs are supported in both the 168 pin PGA package as well as the
237 pin Intel© P24T PGA package, including:
• Intel 486DX, SX-33 5V,
• Intel 486DX2, SX2-66 5V,
• Intel 486DX4-100 3.3V,
• Intel P24D, Write-back DX2-66 5V,
• AMD AM486+, AM486+ DX2 and AM486+ DX4, Write-back and Write-through 3.3V, and
• Cyrix M7 DX2-66, Write-back, 3.3V or 5V.
See pages 15 through 17 for information about setting motherboard jumpers for CPU selection.
Heat Sink
A heat sink must be mounted on the CPU for proper cooling with all clock-multiplied 486-compatible
CPUs. Cont'd

Super Voyager PCI-II 486 ISA Motherboard User's Guide
3
Overview, Continued
Main System Memory
The motherboard requires Fast Page Mode SIMMs operating at 70 ns (RAS access time). The motherboard
supports up to 64 MB of onboard system memory via four 32-bit 72-pin SIMMs (Single Inline Memory
Modules). Supported SIMM types include: 256 KB x 36, 512 KB x 36, 1 MB x 36, 2 MB x 36, 4 MB x 36,
8 MB x 36, or 16 MB x 36 SIMMs.
Fast ATA
This motherboard supports the Fast ATA specification up to mode 4.
L2 Secondary Cache Memory
The motherboard supports 128 KB or 256 KB of direct mapped, write-back L2 external (secondary) cache
memory.
The external (secondary) cache memory is mounted on the motherboard in two rows of four SRAMs each.
The Data SRAM is 15 ns 32 KB x 8 5V SRAMs.
Caution
You must use 5.V SRAMs when upgrading from 128 KB
to 256 KB of L2 secondary cache memory.
Cache memory is enabled and disabled through WINBIOS Setup Advanced Setup.
All installed system memory can be read from or written to L1 internal cache memory and L2 external
cache memory.
Cont'd

Chapter 1 System Overview
4
Overview, Continued
Hardware Reset Switch
The Super Voyager PCI-II 486 ISA motherboard has a standard two-pin reset connector.
Internal Cache Memory
Different 486 CPUs have either 8 KB or 16 KB cache. This cache memory mode is set by WINBIOS
automatically.
Shadow RAM
The system BIOS ROM is always shadowed. Video BIOS and Adaptor ROM shadowing can be enabled via
Advanced Setup in 32 KB increments.
System BIOS
The Super Voyager PCI-II 486 ISA motherboard has a 128 KB WINBIOS with built-in WINBIOS Setup
and user-definable hard disk drive types. The system BIOS is stored in Flash EPROMs and can be
reprogrammed via software without removing the ROM. The system BIOS:
• supports logical block addressing and IDE block mode,
• automatically detects IDE drives,
• provides boot sector virus protection,
• automatically detects and configures system memory,
• allows all EGA, VGA, and adaptor ROM BIOS memory segments to be shadowed to RAM,
• provides automatic PCI configuration, and
• complies with the V1.0A Plug and Play specification. Cont'd

Super Voyager PCI-II 486 ISA Motherboard User's Guide
5
Overview, Continued
CMOS RAM
The Super Voyager PCI-II 486 ISA motherboard has 114 bytes of CMOS RAM. A battery is not provided.
An external 3.6V battery must be connected to J18.
Real Time Clock
The motherboard has a real time clock and CMOS RAM that stores system configuration information used
by WINBIOS Setup.
Onboard I/O
This motherboard includes the following I/O on the motherboard:
• two 40-pin IDE connectors for up to four IDE drives with PCI local bus IDE support,
• a 34-pin connector to a floppy controller that supports up to two 720 KB, 1.2 MB, 1.44 MB, or
2.88 MB floppy drives with vertical recording support for 2.88 MB floppy drives,
• two ten-pin connectors for serial ports,
• a 26-pin connector for one bidirectional parallel port with ECP and EPP support on the
motherboard, and
• a 10-pin berg for a PS/2 mouse connector.
Serial Ports
The motherboard has two RS232C serial ports for COM1 and COM2.
Onboard Battery
The Super Voyager PCI-II ISA motherboard includes an onboard Ni-Cad battery. You can also use an
external 4.5V alkaline battery instead of the onboard battery.

Chapter 1 System Overview
6
Overview, Continued
IDE Features
This motherboard provides:
• IDE on the PCI local bus,
• support for IDE modes 1, 2, 3, and 4,
• two IDE connectors (up to four IDE drives),
• 32-bit data transfer,
• IDE prefetch read buffer,
• Logical Block Address (LBA) support, and
• fast ATA support.
IDE Drive Assignments
If four IDE drives are connected, WINBIOS assigns the physical drive numbers. DOS assigns logical drive
letters:
IDE Drive Drive
Number Drive Letter if One Partition on Drive Drive Letter if Two Partitions on Drive
Primary Master 80h C:\ G:\
Primary Slave 81h D:\ H:\
Secondary Master 82h E:\ I:\
Secondary Slave 83h F:\ J:\
IDE Autodetect
All parameters for all IDE drives assigned to the secondary IDE connector are automatically detected by
WINBIOS.
Caution
If the parameters for an IDE drive cannot be automatically detected
by WINBIOS correctly or if you are using a CHS (Cylinder-Head-
Sector) translation mechanism that is different than the native mode
of the IDE drive, the drive should not be attached to the secondary
IDE controller.
Cont'd

Super Voyager PCI-II 486 ISA Motherboard User's Guide
7
Overview, Continued
Power Management
This motherboard provides the following power management services: a signal to control Green PC-aware
power supplies, automatic power down of IDE drives and video monitor and monitor blanking (HSYNC,
VSYNC, and SYNCEN). The SMI (System Management Interrupt), APM, and system stop clock are
supported if the CPU installed supports these functions.
Seven DMA Channels
This motherboard supports the ISA-standard seven DMA channels.
Fifteen Interrupt Levels
This motherboard supports the ISA-standard 15 hardware interrupt levels. The NMI takes precedence over
all hardware interrupts. IRQs 3, 4, 5, 7, 9, 10, 11, 12, 14, and 15 can be allocated for use on either the ISA
bus or the PCI bus.
ISA Bus
The ISA bus in the motherboard has a system clock that is generated by the bus clock (BCLK) and operates
at approximately 8 MHz.
ISA and PCI Expansion Slots
The Super Voyager PCI-II 486 ISA motherboard has the following expansion slots for adapter cards:
• three PCI expansion slots, and
• Four 16-bit expansion slots for ISA adapter cards.
All PCI expansion slots are bus mastering. The PCI expansion slots are automatically configured by the
onboard American Megatrends WINBIOS system BIOS.