Core Logic Module - ISA Legacy Register Space

32579B

Table 6-49. Miscellaneous Registers (Continued)

Bit

Description

 

 

 

 

 

 

2:0

Reserved. Must be set to 0.

 

 

 

 

 

 

I/O Port 4D1h

Interrupt Edge/Level Select Register 2 (R/W)

Reset Value: 00h

Notes: 1.

If ICW1 - bit 3 in the PIC is set as level, it overrides the setting for bits 7:6 and 4:1 in this register.

 

2.Bits [7:6] and [4:1] in this register are used to configure a PCI interrupt mapped to IRQ[x] on the PIC as level-sensitive (shared).

7IRQ15 Edge or Level Sensitive Select. Selects PIC IRQ15 sensitivity configuration.

0:Edge.

1:Level.

6IRQ14 Edge or Level Sensitive Select. Selects PIC IRQ14 sensitivity configuration.

0:Edge.

1:Level.

5

Reserved. Must be set to 0.

4IRQ12 Edge or Level Sensitive Select. Selects PIC IRQ12 sensitivity configuration.

0:Edge.

1:Level.

3IRQ11 Edge or Level Sensitive Select. Selects PIC IRQ11 sensitivity configuration.

0:Edge.

1:Level.

2IRQ10 Edge or Level Sensitive Select. Selects PIC IRQ10 sensitivity configuration.

0:Edge.

1:Level.

1IRQ9 Edge or Level Sensitive Select. Selects PIC IRQ9 sensitivity configuration.

0:Edge.

1:Level.

0

Reserved. Must be set to 0.

AMD Geode™ SC1200/SC1201 Processor Data Book

309

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AMD manual Core Logic Module ISA Legacy Register Space, AMD Geode SC1200/SC1201 Processor Data Book 309