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Microsoft Windows Logo Program System and Device Requirements  —  41

The following restricted addresses are considered legacy ports and must be replaced by USB or other non-legacy equivalents:

COM = 2E8-2EF, 2F8-2FF, 3E8-3EF, 3F8-3FF LPT = 278-27A, 378-37A, 3BC-3BE Sound Blaster = 0220-022F Joystick/game port = 0x200-0x20F MPU-401 (MIDI) = 0330-0331 FDC = 3F0-3F7 Keyboard/mouse controller = 0060, 0064

These ports must not be available for external connection and must not be detected by the operating system as enabled.

Mobile PC Note New docking stations designed specifically for legacy-free mobile PCs must follow these requirements.

The following exceptions apply:

A4.1.3.8 DELETED
A4.1.3.9 Systems that use the 8042 controller internally can use the related restricted addresses if the 8042 flag is set to 1 in the ACPI FADT.

The 8042 flag must be set to 0 in systems that do not include an 8042 controller.

A4.1.3.10 DELETED
A4.1.3.11 DELETED
A4.1.4 Support required interrupts

The following interrupts are required.

INT 8, INT 9, INT 10, INT 11, INT 13, INT 19, INT 1B, and INT 23 INT 15 subfunctions AH=C0, 4F, 87, 88 and AX=C2xx, E820, E801 INT 16 subfunctions AH=00h, 01h, 02h, 10h, 11h, 12h INT 1A subfunctions AH=0x and AX=B1xx

See details in Table 2 at http://www.microsoft.com/hwdev/platform/PCdesign/LR/Lf.asp.

A4.1.5 Legacy-free debug interface per Debug Port Specification

Legacy-free systems must implement a debug solution that complies with the Debug Port Specification. This capability provides support for debugging and troubleshooting activities.

A4.1.6 When 8042 is not present, A20M# is de-asserted (pulled high) or removed, with no way to mask the A20 address line

If A20M# generation logic (8042) is not present in the system, A20M# must be terminated in a deasserted state to the processor. If 8042 is present, connect in the standard legacy manner.

A4.1.8 See A1.1.4.13

A4.2 Legacy-Free PC System - Industry Standards

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