vt82c586a ETC-unknow, vt82c586a Datasheet - Page 30

• Manufacturer Part Number: vt82c586a
• Description: Integrated Peripheral Controller
• Manufacturer: ETC-unknow

Offset 4A - IDE Interrupt Routing .................................. RW
Preliminary Revision 0.1 October 13, 1996
5-4
3-2
1-0
7
6
Wait
Master/DMA
Put I/O Devices Below 100h to SD Bus
Reserved
IDE Second Channel IRQ Routing
IDE Primary Channel IRQ Routing

00 IRQ14
01 IRQ15.....................................................default
10 IRQ10
11 IRQ11
00 IRQ14.....................................................default
01 IRQ15
10 IRQ10
11 IRQ11
0
1
0
1
Disable ...................................................default
Enable
Disable ...................................................default
Enable
for
........................................ always reads 0
PGNT
Before
Grant
to
ISA
-24-
4C - ISA DMA/Master Memory Access Control 1 ........ RW
4D - ISA DMA/Master Memory Access Control 2 ........ RW
Note:
4F-4E - ISA DMA/Master Memory Access Control 3 ... RW
Note:
15-12 Top of PCI Memory for ISA DMA/Master accesses
7-0
7-0
11
10
9
8
7
6
5
4
3
2
1
0
PCI Memory Hole Bottom Address
These bits correspond to HA[23:16] ............default=0
PCI Memory Hole Top Address (HA[23:16])
These bits correspond to HA[23:16] ............ default=0
Access to the memory defined in the PCI memory
hole will not be forwarded to PCI. This function is
disabled if the top address less than or equal to the
bottom address.
All ISA DMA / Masters that access addresses higher
than the top of PCI memory will not be directed to the
PCI bus.
Forward E0000-EFFFF Accesses to PCI........def=0
Forward A0000-BFFFF Accesses to PCI .......def=0
Forward 80000-9FFFF Accesses to PCI ........def=1
Forward 00000-7FFFF Accesses to PCI ........def=1
Forward DC000-DFFFF Accesses to PCI ......def=0
Forward D8000-DBFFF Accesses to PCI ......def=0
Forward D4000-D7FFF Accesses to PCI .......def=0
Forward D0000-D3FFF Accesses to PCI .......def=0
Forward CC000-CFFFF Accesses to PCI .....def=0
Forward C8000-CBFFF Accesses to PCI ......def=0
Forward C4000-C7FFF Accesses to PCI .......def=0
Forward C0000-C3FFF Accesses to PCI .......def=0
0000 1M
0001 2M
1111 16M
... ...
.................................................... default
Register Descriptions
VT82C586A