7-2
PG 760 PII Programming Device
C79000-G7076-C766-01
7.1
Hardware Address Table
There are two kinds of address areas:
Memory address area
I/O address area.
Different read/write signals (I/O WR, I/O RD, MEMR, MEMW) are used to
reference these areas. The following tables provide you with an overview of
the address areas used. Please refer to the descriptions of the individual
functional groups for more details.
Table 7-1
Assignments of the Memory Addresses
From
Address
To
Address
Size
Assignment
Remark
0000 0000
0007 FFFF
512k
Conventional system memory
0008 0000
0009 FBFF
127k
Conventional system memory
extended
0009 FC00
0009 FFFF
1k
Conventional system memory
extended BIOS data
000A 0000
000A FFFF
64k
Graphics refresh memory
VGA
000B 0000
000B 7FFF
32k
SE graphics interface module
Vacant
000B 8000
000B FFFF
32k
Graphics refresh memory
VGA/CGA
000C 0000
000C C7FF
32k
VGA BIOS expansion
VGA
000C 8000
000D FFFF
96k
Vacant
000E 0000
000E BFFF
48k
System BIOS
Can be used by HIMEM
(up to F F100)
000E C000
000E CFFF
4k
System BIOS BootMessageLogo
000E D000
000E DFFF
4k
System BIOS Plug & Play Area
000E E000
000E FFFF
8k
System BIOS Boot Block
000F 0000
000F FFFF
64k
System BIOS
0010 0000
00EF FFFF
14M
Extended system memory
00F0 0000
00FF FFFF
1M
Extended system memory or
Memory hole
Via BIOS SETUP
0100 0000
17FF FFFF
368M
Extended system memory
1800 0000
FFEF FFFF
4G-128M-
1023k
PCI expansion
FFF8 0000
FFFD FFFF
1023k-128k
ISA memory, reserved for
dual-port RAM
Vacant
FFFE 0000
FFFF FFFF
128k
Shadow of System BIOS
(000E 0000 .. 000F FFFF)
Hardware Information
Содержание SIMATIC PG 760 PII
Страница 10: ...1 4 PG 760 PII Programming Device C79000 G7076 C766 01 Product Overview ...
Страница 38: ...3 16 PG 760 PII Programming Device C79000 G7076 C766 01 Installing and Operating the PG 760 PII ...
Страница 78: ...5 24 PG 760 PII Programming Device C79000 G7076 C766 01 Configuring the PG 760 PII ...