Intel i960 Series User Manual

A HARDWARE REFERENCE
3-23
Local Address Space 0 Local Base Address Register (84H) - A0000001H
• The upper 9 bits of this register replace those used to access the local memory from PCI, since
9 bits are set in the Range Register. Bit 0 is set, enabling PCI accesses to this space. Bit 1 is not
used and, since this region is mapped into memory space, bits 2 and 3 are also unused.
Local Bus Region Descriptor for PCI-to-Local Accesses Register (98H) -
• All RAM regions on the PCI-SDK Platform should use the settings in Table 3-21 for this
register.
MON960 configures the PCI-SDK Platform's 512 Kbyte expansion ROM address range, E0000000H to
E007FFFFH, as PCI expansion ROM. To configure this memory as a PCI expansion ROM region, the
following settings must be made:
Range for PCI-to-Local Expansion ROM Register (90H) - FFF80000H
Table 3-26. Local Expansion ROM Local Base Address (Re-map) and BREQo Register Description
Field Description Read Write
Value after Reset
(Cold PC Reset)
3:0
Direct Slave BREQo Delay Clocks. Number of local bus clocks in which a
Direct Slave HOLD request is pending and a Local Direct Master access is
in progress and not being granted the bus (HOLDA) before asserting
BREQ0. Once asserted, BREQo remains asserted until the PCI 9060
receives HOLDA (LSB= 8 clocks). See Section 3.12.3, Deadlock Configu-
ration (pg. 3-27) for setting this register.
Yes Yes 0
4
Local Bus BREQo Enable. A 1 value enables the PCI 9060 to assert the
BREQo output.
Yes Yes 0
10:5 Not Used Yes No 0
31:11
Re-map of PCI Expansion ROM space into a Local address space. The bits
in this register re-map (replace) the PCI address bits used in decode as the
Local address bits.
Yes Yes FFFF0000H
Table 3-27. Local Expansion ROM Range Register Description
Field Description Read Write
Value after Reset
(Cold PC Reset)
10:0 Not used Yes Yes 0
31:11
Specifies which PCI address bits are used to decode a PCI-to-local
bus expansion ROM. Each bit corresponds to an Address bit 31. Set
(=1) all bits included in decode; clear (=0) all others (Used in
conjunction with PCI Configuration register 30H). Default is 64
KBytes.
Yes Yes FFFF0000H

Intel i960 Series Specifications

General

Brand	Intel
Model	i960 Series
Category	Computer Hardware
Language	English