More real mode instruction and interrupt mechanics tests.#23

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Commits on Mar 23, 2026

Commits on Mar 27, 2026

Moved the entire 16-bit and 32-bit TSS task switch tests to the lower 64KB of a configurable 128KB ROM.
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Commits on Apr 10, 2026

Implemented a function for setting the TSS backlink field.
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Implemented 32-bit TSS and 16-bit TSS initial state validation.
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Implemented TSS task switching busy bit, nested task flag and backlink field validation.
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Fixed TSS busy bit error condition.
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Fixed TSS data segments for user mode to be properly accessible from user mode.
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Fixed TSS busy bit detection and validation.
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- Properly include the TSS size when setting and validating nested task flags.
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Fixed NT flag validation and TSS size bit positions.
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Commits on Apr 12, 2026

Commits on Apr 13, 2026

Implemented ring 2 stack validation when validating the TSS task switch functionality for both 16-bit and 32-bit TSS.
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Commits on Apr 15, 2026

Split the POST A into POST 20, 21, 22.
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Commits on Apr 16, 2026

Moved the BIOS expansion area into a seperate file.
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Commits on Apr 22, 2026

Commits on May 24, 2026

- Added a test for a far return with immediate to a more privileged privilege level.
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Commits on Jun 1, 2026

Commits on Jun 26, 2026

Fixed interrupt gate and call gate far calls when compiled with the latest nasm.
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