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Add interrupts module: INT 3 (CC breakpoint) vs INT 21h (DOS services)

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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
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asmhatre
2026-09-30 19:10:56 +00:00
co-authored by Claude Sonnet 5.5
commit 09af523f8c
27 changed files with 1029 additions and 0 deletions
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interrupts/output/07-debug-cd03.txt
+25
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-u 100 L9
072E:0100 B81111 MOV AX,1111
072E:0103 CD03 INT 03
072E:0105 B82222 MOV AX,2222
072E:0108 B8004C MOV AX,4C00
-g
AX=1111 BX=0000 CX=000D DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=072E ES=072E SS=072E CS=072E IP=0104 NV UP EI PL ZR NA PE NC
072E:0104 03B82222 ADD DI,[BX+SI+2222] DS:2222=0000
-r
AX=1111 BX=0000 CX=000D DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=072E ES=072E SS=072E CS=072E IP=0104 NV UP EI PL ZR NA PE NC
072E:0104 03B82222 ADD DI,[BX+SI+2222] DS:2222=0000
-t
AX=1111 BX=0000 CX=000D DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=072E ES=072E SS=072E CS=072E IP=0108 NV UP EI PL ZR NA PE NC
072E:0108 B8004C MOV AX,4C00
-r
AX=1111 BX=0000 CX=000D DX=0000 SP=FFFE BP=0000 SI=0000 DI=0000
DS=072E ES=072E SS=072E CS=072E IP=0108 NV UP EI PL ZR NA PE NC
072E:0108 B8004C MOV AX,4C00
-g
Program terminated normally (0000)
-q