6-2
System Design
AMD-K5 Processor Technical Reference Manual
18524C/0—Nov1996
6.1.1
Memory Map
Figure 6-1 shows a typical physical memory map for a DOS-
based desktop system after DOS boots. Various regions of this
memory map to RAM or ROM on the motherboard and adapter
boards. The processor hardware imposes only two constraints
on the physical memory map implemented by system hard-
ware—the boot address at FFFF_FFF0h, which is accessed
when RESET or INIT is asserted, and the default addresses for
SMM. However, other physical memory mapping requirements
are imposed by BIOS, the operating system, and the specific
hardware implemented for the system. In general, the conven-
tions for hardware memory mapping for DOS-based desktop
systems include the following:
■
Memory-decoder aliasing of boot ROM space
■
Cacheable vs. noncacheable address spaces
■
SMM memory address space (optional)
Each of these issues is summarized briefly in the sections that
follow.
Summary of Contents for AMD-K5
Page 1: ...AMD K5 Processor Technical Reference Manual TM...
Page 10: ...x AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 24: ...1 4 Overview AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 54: ...2 30 Internal Architecture AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 116: ...4 26 Performance AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 356: ...6 44 System Design AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 380: ...7 24 Test and Debug AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 396: ...A 16 AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...
Page 406: ...I 10 Index AMD K5 Processor Technical Reference Manual 18524C 0 Nov1996...