2-28
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
Address
Size
Description
from
to
byte
Basic function
Additional functions
0360
036F
16
PC-Net expansion card
usually free
0370
037F
16
Secondary Floppy
unassigned
0376
0376
1
Secondary IDE command
0377
0377
1
Secondary IDE status
0378
037F
8
LPT 1
0380
038F
16
SDLC 2 expansion card
usually free
03A0
03AF
16
SDLC 1 expansion card
usually free
03B0
03BB
12
Monochrome monitor card / VGA
03BC
03BF
4
LPT x unassigned
unassigned
03C0
03CF
16
VGA control register
03D0
03DF
16
CGA / VGA control register
03E0
03E1
2
PCMCIA controller
can be switched off in Setup
then free
03E8
03EF
2
COM 3 unassigned
03F0
03F5
6
Primary Floppy on board
03F6
03F6
1
Primary IDE command
03F7
03F7
1
Primary IDE status / Floppy Chg.
03F8
03FF
8
COM 1/TTY
0400+
0400+
LPT 8
ECP LPT
04D0
04D1
8
PiiX PIC 1, 2 Interrupt controller edge/level
control
0CF8
0CFB
4
PCI config index (TSC)
0CF9h PiiX CPU system reset
0CFC
0CFF
4
PCI config data (TSC)
FCF0
FCF2
2
Bus Master Interface prim. IDE register
Command & Status
FCF4
FCF7
4
Bus Master Interface prim. IDE register
Memory Descriptor Table Base Address
FCF8
FCFA
2
Master Interface sec. IDE register Command
& Status
FCFC
FCFF
4
Bus Master Interface sec. IDE register
Memory Descriptor Table Base Address
Motherboard