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nescript/tests
Claude 08322abda4
Codegen: on_scanline per-state dispatch + NMI reload
Extends the \`on_scanline\` codegen to support multiple scanline
handlers across states:

- \`__irq_user\` now dispatches by \`current_state\`: each state with a
  scanline handler gets a CMP/BNE/JSR entry in the dispatch table.
  States without a handler fall through to just acknowledge the IRQ.
- New \`__ir_mmc3_reload\` helper that (re)loads the MMC3 counter
  latch based on \`current_state\`. States without a scanline handler
  fall through to disable the IRQ (\$E000 write).
- Linker detects the \`__ir_mmc3_reload\` label in user code and
  splices a JSR into it at the top of the NMI handler, so the
  counter is reloaded once per frame with the current state's
  target scanline.
- IRQ handler no longer re-enables IRQ on ACK (the NMI reload now
  handles that) so it won't fire multiple times per frame.
- Program init chooses the start state's scanline count (if any) or
  the first scanline handler found as a fallback.

Also fixes \`dump_asm\`: a \`NOP\` with a \`Label\` operand is a label
definition, but any other opcode with a \`Label\` operand is a real
instruction like \`JSR foo\`. The old dump was hiding JSR/JMP targets.

https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
2026-04-12 16:29:15 +00:00
..
integration Implement NEScript compiler Milestone 1 ("Hello Sprite") 2026-04-11 22:07:56 +00:00
integration_test.rs Codegen: on_scanline per-state dispatch + NMI reload 2026-04-12 16:29:15 +00:00