7
7-5
PG 760 Programming Device
C79000-G7076-C761-01
From
to
Byte
Basic Function
Possible Alternative Function
Address
Size
Function
03E0
03E1
2
Vacant
03E8
03EF
2
COM 3 not used
03F0
03F5
6
Floppy 1 on board
03F6
03F6
1
Primary IDE command
03F7
03F7
1
Primary IDE status / Floppy Change
03F8
03FF
8
COM 1 / TTY
0778
077A
3
ECP LPT1
04D0
04D1
2
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 primary IDE register
Command & Status
FCF4
FCF7
4
Bus master interface prim. IDE register
Memory descriptor Table Base Adress
FCF8
FCFA
2
Bus master interface prim. IDE register
Command & Status
FCFC
FCFF
4
Bus master interface prim. IDE Register
Memory descriptor table base address
Table 7-3
DMA assignment
DMA Channel
Data Transfer
Description
0
8 / 16 bits
Vacant
1
8 / 16 bits
Vacant
2
8 / 16 bits
Floppy
3
8 / 16 bits
Vacant
4
Cascading of
DMA Controller
5
16 bits
Vacant
6
16 bits
Vacant
7
16 bits
Vacant
Hardware Information