Hardware Information; Hardware Address Table - Siemens SIMATIC PG 720 P Manual

Hardware Information

8.1

Hardware Address Table

There are two kinds of address area:
Different read/write signals (I/O WR, I/O RD, MEMR, MEMW) are used to
address these areas. The following tables provide you with an overview of
the address areas used. For further information, refer to the description of the
individual function modules.
Table 8-1 Assignment of the Memory Addresses
From To
Address Address
0000 0000 0007 FFFF
0008 0000 0009 FBFF
0009 FC00 0009 FFFF
000A 0000 000A FFFF
000B 0000 000B 7FFF
000B 8000 000B FFFF
000C 0000 000C BFFF
000C C000 000C C7FF
000C C800 000C FFFF
000D 0000 000D 7FFF
000D 8000 000D FFFF
000E 0000 000E BFFF
000E C000 000E CFFF
000E D000 000E DFFF
000E E000 000E FFFF
000F 0000 000F FFFF
0010 0000 00EF FFFF
00F0 0000 00FF FFFF
0100 0000 07FF FFFF
0800 0000 FFFD FFFF
FFFE 0000 FFFF FFFF
8-2
Memory address area
I/O address area.
Size Basic Function Described
512k Conventional system memory
127k Conventional system memory
extended
1k PS/2 mouse (BIOS) only until
mouse driver is loaded
64k VGA graphics refresh memory
32k B/W graphics/text refresh memory Shared SMM for power
32k VGA graphics/text refresh memory Shared SMM for power
48k VGA BIOS expansion
2k MPI if enabled
14k Free or PCMCIA driver
32k Free or PCMCIA driver
32k Free or PCMCIA driver
48k System BIOS
4k System BIOS Boot Message Logo
4k System BIOS ECSD (plug & play
configuration area)
8k Setup
64k System BIOS
14M Extended system memory
1M Extended system memory
112M Extended system memory
4G-128M-12 PCI address area or shadowed ISA
8k address area
128k System BIOS (shadow of 000E
0000 .. 000F FFFF)
Possible Alternative
Function
Via Setup ISA memory
Via Setup ISA memory
Shared SMM for power
management
management
management
Via EMM high DOS memory
Via EMM high DOS memory
Via EMM high DOS memory
Via EMM high DOS memory
Via EMM high DOS memory
Via EMM high DOS memory
Via EMM high DOS memory
Via EMM high DOS memory
Via Setup ISA memory
PG 720 P Programming Device
C79000-G7076-C721-02