Intel 460GX Software Developer’s Manual page 185

10.5.9.2 Example #2: Mixed Ultra DMA/33 and Non-ultra DMA/33 Configuration
Drive Type Position
Drive 0 Fixed Disk Primary
Master
Drive 1 Fixed Disk Primary
Slave
Drive 2 ATAPI Secondary
CDROM Single
In the above configuration, Ultra DMA Mode 2 will only be enabled on Drive 0. 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
10.5.9.3 Example #3: Non Ultra DMA/33 Drive Configuration
Drive Type Position
Drive 0 Fixed Disk Primary
Master
Drive 1 Fixed Disk Primary Slave
Drive 2 ATAPI Secondary
CDROM Single
Intel® 460GX Chipset Software Developer's Manual
Best
Ultra Best DMA Best PIO
DMA Mode Mode
Mode
Ultra Multi Word PIO4
DMA DMA Mode
Mode 2 2
N/A Multi Word PIO4
DMA Mode
2
N/A Multi Word PIO3
DMA Mode
1
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
N/A Multi Word PIO4
DMA Mode 2
N/A Multi Word PIO4
DMA Mode 2
N/A Multi Word PIO3
DMA Mode 1
IFB Usage Considerations
Non Ultra DMA
IFB Ultra Supported?
IFB
DMA Best DMA
Mode
Mode Mode is {SW2,
MW1, MW2}
Ultra Mode 4 yes
DMA
Mode 2
N/A (Ultra Mode 4 yes
DMA
disabled)
N/A (Ultra Mode 3 yes
DMA
disabled)
Value
0005h Ensure that bits 0 and 2 are '1'.
System dependent
System dependent Ensure that bit 0 (of register value)
is '1'.
E377h Mode config. for Primary
A103h Mode config. for Secondary
0Bh
01h Drive 0 is Ultra DMA capable.
0002h Ultra DMA mode config.
Non Ultra DMA
IFB Ultra IFB
DMA Mode Mode
N/A (Ultra Mode 4 yes
DMA
disabled)
N/A (Ultra Mode 4 yes
DMA
disabled)
N/A (Ultra Mode 3 yes
DMA
disabled)
Fast PIO
Supported?
Best PIO Mode >=
Best DMA Mode
yes
yes
yes
Comments
Fast PIO
Supported? Supported?
Best DMA Best PIO Mode
Mode is {SW2, >= Best DMA
MW1, MW2} Mode
yes
yes
yes
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