asmhatreandClaude Sonnet 5.5
09af523f8c
NASM sources, DOSBox/FreeDOS Debug/Unicorn harness, captured output and 31 assertions backing the ankurm.com article "INT 3 vs INT 21h in 8086 Assembly". Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01KqJyCidz3ZgRyHABv2GVJh
10 lines
889 B
Plaintext
10 lines
889 B
Plaintext
1 ; opcodes.asm -- which bytes does each spelling assemble to? (read the listing, never run)
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2 bits 16
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3 org 0x100
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4 00000000 CC int3 ; the one-byte breakpoint -> CC
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5 00000001 CD03 int 3 ; "INT n" with n = 3 in NASM -> CD 03
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6 00000003 CD03 db 0CDh, 03h ; the same two bytes, written out -> CD 03
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7 00000005 CD21 int 21h ; DOS entry point -> CD 21
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8 00000007 CD10 int 10h ; BIOS video -> CD 10
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9 00000009 CE into ; one-byte INTO -> CE
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