DIO24, User Manual
D8
Memory Space 0 Prefetch Disable (Unused)
D9
Expansion ROM Space Prefetch Disable (Unused)
D10 Read
Prefetch
Count Enable (Unused)
D14:11 Prefetch Counter (Unused)
D15 Reserved
D17:16 Expansion ROM Space Local Bus Width (Unused)
D21:18 Expansion ROM Space Internal Wait States (Unused)
D22
Expansion ROM Space Ready Input Enable (Unused)
D23
Expansion ROM Space Bterm Input Enable (Unused)
D24
Memory Space 0 Burst Enable
D25
Extra Long Load from Serial Enable
D26
Expansion ROM Space Burst Enable (Unused)
D27
Direct Slave PCI Write Mode
D28:31 PCI Target Retry Delay Clocks
5.3. Runtime Registers
The Runtime registers consist of mailbox registers, doorbell registers, and a general-purpose control register. The
mailbox and doorbell registers are not used on the DIO24.
Table 8
Register map of the Runtime Registers.
PCI
CFG
Addr
Local
Offset
Addr
PCI/Local
Writable
Register Name
Value after
Reset
0x40
0xC0
Y
Mailbox Register 0 (Unused)
0x00000000
0x44
0xC4
Y
Mailbox Register 1 (Unused)
0x00000000
0x48
0xC8
Y
Mailbox Register 2 (Unused)
0x00000000
0x4C
0xCC
Y
Mailbox Register 3 (Unused)
0x00000000
0x50
0xD0
Y
Mailbox Register 4 (Unused)
0x00000000
0x54
0xD4
Y
Mailbox Register 5 (Unused)
0x00000000
0x58
0xD8
Y
Mailbox Register 6 (Unused)
0x00000000
0x5C
0xDC
Y
Mailbox Register 7 (Unused)
0x00000000
0x60
0xE0
Y
PCI to Local Doorbell Register (Unused)
0x00000000
0x64
0xE4
Y
Local to PCI Doorbell Register (Unused)
0x00000000
0x68 0xE8
Y
Interrupt
Control/Status
0x00000000
0x6C
0xEC
Y
General Purpose Control
0x00000000
0x70
0xF0
N
Permanent Device ID/ Permanent Vendor ID
0x10B59080
0x74 0xF4
N
Permanent
Revision
ID
0x0000000X
0x78
0xC0
Y
Mailbox Register 0 (Unused)
0x00000000
0x7C
0xC4
Y
Mailbox Register 1 (Unused)
0x00000000
5.3.1. Interrupt Control /Status
(PCI 0x68, Reset 0x00000000)
D0
Enable Local bus LSERR# (Unused)
D1
Enable Local bus LSERR# on a PCI parity error (Unused)
D2
Generate PCI Bus SERR#
D3
Mailbox Interrupt Enable (Unused)
D7:4 Reserved
D8 PCI
Interrupt
Enable
D9
PCI Doorbell Interrupt Enable (Unused)
D10
PCI Abort Interrupt Enable
D11
PCI Local Interrupt Enable
26
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