Programs are rarely written to run at memory address 0000h . If you are analyzing a Sinclair ZX Spectrum ROM or a CP/M application, you need to set the . A full online disassembler lets you specify the starting offset so that absolute memory addresses (like JP 1234h ) are calculated correctly. 3. Support for Undocumented Opcodes
Whether you're fixing a bug in a 40-year-old arcade game or just curious about how 8-bit math works, the right online tool makes the past readable again.
Automatically creates labels for jump targets ( JMP , CALL ). Syntax Selection: Supports both Zilog and Intel styles.
A performs the inverse operation of an assembler. While an assembler takes human-readable mnemonics (like LD A, 05h ) and turns them into machine code ( 3E 05 ), a disassembler takes those raw bytes and translates them back into mnemonics.
Review the output. Look for the RST (Restart) vectors and RET (Return) points to understand the program flow. Most online tools allow you to download the resulting .asm file for further editing. Why Use an Online Tool vs. Desktop Software?
Set your starting address (Origin) and choose your preferred syntax (Zilog is standard).
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Programs are rarely written to run at memory address 0000h . If you are analyzing a Sinclair ZX Spectrum ROM or a CP/M application, you need to set the . A full online disassembler lets you specify the starting offset so that absolute memory addresses (like JP 1234h ) are calculated correctly. 3. Support for Undocumented Opcodes
Whether you're fixing a bug in a 40-year-old arcade game or just curious about how 8-bit math works, the right online tool makes the past readable again.
Automatically creates labels for jump targets ( JMP , CALL ). Syntax Selection: Supports both Zilog and Intel styles.
A performs the inverse operation of an assembler. While an assembler takes human-readable mnemonics (like LD A, 05h ) and turns them into machine code ( 3E 05 ), a disassembler takes those raw bytes and translates them back into mnemonics.
Review the output. Look for the RST (Restart) vectors and RET (Return) points to understand the program flow. Most online tools allow you to download the resulting .asm file for further editing. Why Use an Online Tool vs. Desktop Software?
Set your starting address (Origin) and choose your preferred syntax (Zilog is standard).