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| 型號： | YKNIFEX4HW |
| 英文描述： | IC APEX 20KE FPGA 100K |
| 中文描述： | 耶洛奈夫參考平臺硬件設計手冊 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 186K |
| 代理商： | YKNIFEX4HW |
Yellowknife X4 Hardware Reference Manual
Page 16 /22
Motorola Inc.
Unrestricted Distribution Permitted
98 Feb 20
2.14 Slots
YK contains three PCI slots, two ISA slots and one dedicated Apple I/O slot.
The three PCI slots are standard 32-bit, 33 MHz, 3.3V/5V types. The number cannot be
expanded without the use of a bridge device due to the limitations on PCI bus loading and
because of the limited number of PCI arbiter channels currently within the PCI-ISA bridge
device.
Note that the PCI slots use the “rotating” interrupt assignment method. PCI cards typi-
cally implement only one function, and use only INTA#. For such cards, the slots can be
treated as having completely independant interrupts. When multifunction cards are used,
each slot may use multiple interrupt lines, possibly sharing them with an adjacent slot.
The two ISA slots are standard 16-bit ISA slots. The number can be easily expanded to
the industry standard of three or four. Only two are present on Yellowknife due to the ATX
chassis limitations, four-layer routing restrictions, and to the fact that the special Apple I/
O card replaces one of the ISA slots.
The Apple I/O slot is used to allow place connectors for the ADB and GeoPort connectors.
This connector is not standardized but was dened by Motorola and is used on other plat-
forms as well.
3.0 Software
3.1 Memory Map
The default memory map for the Yellowknife X4 is “CHRP”, Map “B”, though the board
can be congured to either mode. Refer to the MPC106 User’s Manual for details on the
maps as viewed from the processor or from PCI.
CHANGES: X4 defaults to CHRP mode, while X2 defaulted to PREP mode.
Table 4: PCI Slot IDs
IDSEL
Cong Address
South
Bridge
REQ/
GNT
Hydra Interrupt
INTA
#
INTB
#
INTC
#
INTD
#
AD14
0x8080_4000
0
XINT1
XINT2
XINT3
XINT4
AD15
0x8080_8000
2
XINT2
XINT3
XINT4
XINT1
AD16
0x8081_0000
3
XINT3
XINT4
XINT1
XINT2
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