Vector35 / Vector35/Z80

SLL / SL1 is not lifted

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Dominant language
Python
Stars
12
Forks
5
PR merge metrics
No merged PRs in 30d

Description

The undocumented SLL (CB 30-37, and the DDCB/FDCB xx 30-37 forms) has no case in gen_instr_il(), so it falls through to the catch-all il.unimplemented().

Low priority — it only appears in code that deliberately uses undocumented opcodes.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start in gen_instr_il(), where the CB 30-37 and DDCB/FDCB xx 30-37 forms currently fall through to il.unimplemented(). Read the surrounding instruction handling and trace these opcode forms; done means SLL/SL1 is lifted instead of reaching the catch-all path.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
reverse-engineering
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
58/100

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