Super-Voyager LC Motherboard User's Guide
Specifications,
Continued
System Support Functions
The Super Voyager LC supports all standard ISA functions and
some nonstandard functions:
•
seven Direct Memory Access (DMA) channels:
Channels 0 - 3 are used for 8-bit data transfer;
Channels 5 - 7 are used for 16-bit data transfers.
•
sixteen interrupt levels:
eleven levels of interrupt are supported, including:
IRQ3–IRQ7, IRQ9–13 IRQ12, IRQ14, and IRQ15.
•
three programmable timers, and a
•
system clock.
•
ability to access 32-, 16-, and 8-bit memory devices and
16- and 8-bit I/O devices.
•
standard ISA I/O port addresses: 0100h through 03FFh.
•
24-bit memory addresses that can access 16 MB of
memory address space.
•
uses an
I/O channel check
to generate NMIs.
•
supports I/O wait state generation.
•
has an open bus structure that permits multiple
microprocessors to share system resources, including
system memory.
•
the bus operates at:
∙
8.00 MHz for 20 MHz motherboards,
∙
8.25 MHz for 33 MHz motherboards, and
∙
8.33 MHz for 25 or 50 MHz motherboards.
•
permits system memory refresh from channel
microprocessors.
Summary of Contents for Baby Voyager 80486
Page 1: ...American Megatrends Inc 80486 Voyager LC Motherboard User s Guide MAN 661 4 27 01 ...
Page 14: ...Chapter 2 Installation 8 ...
Page 15: ...Super Voyager LC Motherboard User s Guide Series 61 Motherboard Layout ...
Page 19: ...Super Voyager LC Motherboard User s Guide ...
Page 74: ...Appendix A Upgrading Cache Memory 68 Cache Diagram ...
