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Revision 3.0

Core Logic Module (Continued)

Low MPU I/O Trap. If this bit is enabled and an access occurs at I/O Port 300h-301h, an SMI is generated.

0: Disable.

1: Enable.

Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[1].

Second level SMI status is reported at F3BAR0+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR0+Memory Offset 14h[11].

Fast Path Read Enable/SMI Disable. When asserted, read Fast Path (an SMI is not generated on reads from specified

addresses).

0: Disable.

1: Enable.

In Fast Path Read the Core Logic module responds to reads of addresses: 388h-38Bh; 2x0h, 2x1, 2x2h, 2x3, 2x8 and 2x9h.

If neither sound card nor FM I/O mapping is enabled, then status read trapping is not possible.

FM I/O Trap. If this bit is enabled and an access occurs at I/O Port 388h-38Bh, an SMI is generated.

0: Disable.

1: Enable.

Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[1].

Second level SMI status is reported at F3BAR0+Memory Offset 10h/12h[0].

Sound Card I/O Trap. If this bit is enabled and an access occurs in the address ranges selected by bits [1:0], an SMI is gen-

erated.

0: Disable.

1: Enable.

Top level SMI status is reported at F1BAR0+I/O Offset 00h/02h[1].

Second level SMI status is reported at F3BAR0+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR0+Memory Offset 14h[10].

1:0

Sound Card Address Range Select. These bits select the address range for the sound card I/O trap.

00: I/O Port 220h-22Fh

10: I/O Port 260h-26Fh

01: I/O Port 240h-24Fh

11: I/O Port 280h-28Fh

Offset 1Ah-1Bh

Internal IRQ Enable Register (R/W)

Reset Value: 0000h

IRQ15 Internal. Configures IRQ15 for internal (software) or external (hardware) use.

0: External.

1: Internal.

IRQ14 Internal. Configures IRQ14 for internal (software) or external (hardware) use.

0: External.

1: Internal.

Reserved. Must be set to 0.

IRQ12 Internal. Configures IRQ12 for internal (software) or external (hardware) use.

0: External.

1: Internal.

IRQ11 Internal. Configures IRQ11 for internal (software) or external (hardware) use.

0: External.

1: Internal.

IRQ10 Internal. Configures IRQ10 for internal (software) or external (hardware) use.

0: External.

1: Internal.

IRQ9 Internal. Configures IRQ9 for internal (software) or external (hardware) use.

0: External.

1: Internal.

Reserved. Must be set to 0.

IRQ7 Internal. Configures IRQ7 for internal (software) or external (hardware) use.

0: External.

1: Internal.

Table 5-38. F3BAR0+Memory Offset: XpressAUDIO Configuration Registers (Continued)

Bit

Description

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