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IR codegen: Player 2 controller support

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ReadInput now takes an explicit player index (0 = P1, 1 = P2). The IR
lowering for ButtonRead threads the player through, and the IR codegen
selects the correct zero-page input byte ($01 for P1, $08 for P2).

https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3
This commit is contained in:
Claude 2026-04-12 10:40:42 +00:00
parent adf50aaa7f
commit 8a6441071e
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5 changed files with 17 additions and 10 deletions
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6
src/codegen/ir_codegen.rs
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@ -407,8 +407,10 @@ impl<'a> IrCodeGen<'a> {
self.load_temp(*x);
self.emit(STA, AM::Absolute(base + 3));
}
IrOp::ReadInput(dest) => {
self.emit(LDA, AM::ZeroPage(0x01)); // ZP_INPUT_P1
IrOp::ReadInput(dest, player) => {
// $01 = P1 input byte, $08 = P2 input byte
let addr = if *player == 1 { 0x08 } else { 0x01 };
self.emit(LDA, AM::ZeroPage(addr));
self.store_temp(*dest);
}
IrOp::WaitFrame => {