1-6 Technical Information
The system memory map in shown in Table 1-2.
Table 1-2 System Memory Map
Memory Space
Size
Function
100000-8000000
130048 KB
Extended memory
F0000-FFFFF
64 KB
AMI System BIOS
EC000-EFFFF
16 KB
FLASH boot block (available as UMB)
EA000-EBFFF
8 KB
ECSD (Plug and Play configuration area)
E8000-E9FFF
8 KB
OEM logo (available as UMB)
E0000-E7FFF
32 KB
BIOS reserved (currently available as UMB)
C8000-DFFFF
96 KB
Available HI DOS memory (open to ISA and PCI
bus)
A0000-C7FFF
160 KB
Available HI DOS memory (normally reserved for
Video BIOS)
9FC00-9FFFF
1 KB
Extended BIOS data
80000-9FBFF
127 KB
Extended conventional
00000-7FFFF
512 KB
Conventional base memory
I/O Addressing
The processor communicates with I/O devices by I/O mapping. The hexadecimal (hex)
addresses of I/O devices are listed in Table 1-3.
Table 1-3 I/O Address Map
Address (Hex)
I/O Device Name
0000-000F
DMA controller 1 (channel 0-3)
0020-0021
Interrupt controller 1
002E-002F
I/O configuration registers
0040-0043
Timer 1
0048-004B
Timer 2
0060
Keyboard controller data byte
0061
NMI, speaker control
0064
Keyboard controller, command/status byte
0060, bit 7
Enable NMI
0060, bits 6 through 0
Real time clock, address
Summary of Contents for POWERMATE PRO150
Page 152: ...A 16 Connector Pin Assignments ...
Page 160: ...B 8 System Board Settings ...