Example Configurations; Ifb Settings Checklist - Intel 460GX Software Developer’s Manual

IFB Usage Considerations
Table 10-14. IFB Settings Checklist
Register
PCI Command Register
PCI Master Latency Timer
PCI Bus Master IDE Base I/O Address
IDE Timing Register 1
IDE Timing Register 2
Secondary IDE Timing Register
Ultra DMA Control Register
Ultra DMA Timing Register
10.5.9

Example Configurations

This section provides examples of drive configurations on a IFB-based system.
10.5.9.1 Example #1: Ultra DMA/33 Configuration
Drive Type Position
Drive 0 Fixed Disk Primary
Single
Drive 2 ATAPI Secondary
CDROM Single
In the above configuration, since both drives support Ultra DMA, Ultra DMA will be enabled on
each of the drives: Ultra DMA Mode 2 for Drive 0 and Ultra DMA Mode 1 for Drive 1. Non-ultra
DMA and Fast PIO support will be enabled on each drive as well.
Register
PCI Command Register
PCI Master Latency Timer
PCI Bus Master IDE Base I/O
Address
IDE Timing Register 1
IDE Timing Register 2
Secondary IDE Timing Register
Ultra DMA Control Register
Ultra DMA Timing Register
10-14
Type Offset
PCI 04h
PCI 0Dh
PCI 20-23h
PCI 40-41h
PCI 42-43h
PCI 44h
PCI 48h
PCI 4A-4Bh
Best
Ultra Best DMA Best PIO
DMA Mode Mode
Mode
Ultra Multi Word PIO4
DMA DMA Mode
Mode 2 2
Ultra Multi Word PIO3
DMA DMA Mode
Mode 1 1
Type Offset
PCI 04h
PCI 0Dh
PCI 20-23h
PCI 40-41h
PCI 42-43h
PCI 44h
PCI 48h
PCI 4A-4Bh
Value
0005h Ensure that bits 0 and 2 are '1'
Ensure that bit 0 (of register value) is '1'
Non Ultra DMA
IFB Ultra Supported?
IFB
DMA Best DMA
Mode
Mode Mode is {SW2,
MW1, MW2}
Ultra Mode 4 yes
DMA
Mode 2
Ultra Mode 3 yes
DMA
Mode 1
Value
0005h Ensure that bits 0 and 2 are '1'.
system dependent
system dependent Ensure that bit 0
(of register value) is '1'.
A307h mode config. for Primary
A303h mode config. for Secondary
00h
05h Drive 0 and 2 are Ultra DMA
capable.
0102h Ultra DMA mode config.
Intel® 460GX Chipset Software Developer's Manual
Comments
Fast PIO
Supported?
Best PIO Mode >=
Best DMA Mode
yes
yes
Comments