crates/prometeu-compiler/src/backend/emit_bytecode.rs

@@ -103,6 +103,9 @@ impl<'a> BytecodeEmitter<'a> {
                         let mapped_id = mapped_const_ids[id.0 as usize];
                         asm_instrs.push(Asm::Op(OpCode::PushConst, vec![Operand::U32(mapped_id)]));
                     }
+                    InstrKind::PushBounded(val) => {
+                        asm_instrs.push(Asm::Op(OpCode::PushBounded, vec![Operand::U32(*val)]));
+                    }
                     InstrKind::PushBool(v) => {
                         asm_instrs.push(Asm::Op(OpCode::PushBool, vec![Operand::Bool(*v)]));
                     }

crates/prometeu-compiler/src/compiler.rs

@@ -224,7 +224,7 @@ mod tests {
 000C  Mul
 000E  Ret
 0010  PushConst U32(2)
-0016  Syscall U32(4097)
+0016  Syscall U32(4112)
 001C  PushConst U32(3)
 0022  SetLocal U32(0)
 0028  GetLocal U32(0)

crates/prometeu-compiler/src/frontends/pbs/contracts.rs

@@ -18,7 +18,7 @@ impl ContractRegistry {
         // GFX mappings
         let mut gfx = HashMap::new();
         gfx.insert("clear".to_string(), ContractMethod {
-            id: 0x1001,
+            id: 0x1010,
             params: vec![PbsType::Struct("Color".to_string())],
             return_type: PbsType::Void,
         });
@@ -62,12 +62,12 @@ impl ContractRegistry {
         // Input mappings
         let mut input = HashMap::new();
         input.insert("pad".to_string(), ContractMethod {
-            id: 0x2001,
+            id: 0x2010,
             params: vec![],
             return_type: PbsType::Struct("Pad".to_string()),
         });
         input.insert("touch".to_string(), ContractMethod {
-            id: 0x2002,
+            id: 0x2011,
             params: vec![],
             return_type: PbsType::Struct("Touch".to_string()),
         });

crates/prometeu-compiler/src/frontends/pbs/lowering.rs

@@ -2,6 +2,7 @@ use crate::common::diagnostics::{Diagnostic, DiagnosticBundle, DiagnosticLevel};
 use crate::frontends::pbs::ast::*;
 use crate::frontends::pbs::symbols::*;
 use crate::frontends::pbs::contracts::ContractRegistry;
+use crate::frontends::pbs::types::PbsType;
 use crate::ir_core;
 use crate::ir_core::ids::{FieldId, FunctionId, TypeId, ValueId};
 use crate::ir_core::{Block, Function, Instr, Module, Param, Program, Terminator, Type};
@@ -126,7 +127,7 @@ impl<'a> Lowerer<'a> {
                 name: param.name.clone(),
                 ty: ty.clone(),
             });
-            self.local_vars[0].insert(param.name.clone(), i as u32);
+            self.local_vars[0].insert(param.name.clone(), LocalInfo { slot: i as u32, ty: ty.clone() });
             local_types.insert(i as u32, ty);
         }
 
@@ -184,8 +185,7 @@ impl<'a> Lowerer<'a> {
                 Ok(())
             }
             Node::BoundedLit(n) => {
-                let id = self.program.const_pool.add_int(n.value as i64);
+                self.emit(Instr::PushBounded(n.value));
-                self.emit(Instr::PushConst(id));
                 Ok(())
             }
             Node::Ident(n) => self.lower_ident(n),
@@ -259,7 +259,7 @@ impl<'a> Lowerer<'a> {
         
         // 2. Preserve gate identity
         let gate_slot = self.get_next_local_slot();
-        self.local_vars.last_mut().unwrap().insert(format!("$gate_{}", gate_slot), gate_slot);
+        self.local_vars.last_mut().unwrap().insert(format!("$gate_{}", gate_slot), LocalInfo { slot: gate_slot, ty: Type::Int });
         self.emit(Instr::SetLocal(gate_slot));
         
         // 3. Begin Operation
@@ -269,7 +269,7 @@ impl<'a> Lowerer<'a> {
         // 4. Bind view to local
         self.local_vars.push(HashMap::new());
         let view_slot = self.get_next_local_slot();
-        self.local_vars.last_mut().unwrap().insert(n.binding.to_string(), view_slot);
+        self.local_vars.last_mut().unwrap().insert(n.binding.to_string(), LocalInfo { slot: view_slot, ty: Type::Int });
         self.emit(Instr::SetLocal(view_slot));
         
         // 5. Body
@@ -288,7 +288,7 @@ impl<'a> Lowerer<'a> {
         
         // 2. Preserve gate identity
         let gate_slot = self.get_next_local_slot();
-        self.local_vars.last_mut().unwrap().insert(format!("$gate_{}", gate_slot), gate_slot);
+        self.local_vars.last_mut().unwrap().insert(format!("$gate_{}", gate_slot), LocalInfo { slot: gate_slot, ty: Type::Int });
         self.emit(Instr::SetLocal(gate_slot));
         
         // 3. Begin Operation
@@ -298,7 +298,7 @@ impl<'a> Lowerer<'a> {
         // 4. Bind view to local
         self.local_vars.push(HashMap::new());
         let view_slot = self.get_next_local_slot();
-        self.local_vars.last_mut().unwrap().insert(n.binding.to_string(), view_slot);
+        self.local_vars.last_mut().unwrap().insert(n.binding.to_string(), LocalInfo { slot: view_slot, ty: Type::Int });
         self.emit(Instr::SetLocal(view_slot));
         
         // 5. Body
@@ -317,7 +317,7 @@ impl<'a> Lowerer<'a> {
         
         // 2. Preserve gate identity
         let gate_slot = self.get_next_local_slot();
-        self.local_vars.last_mut().unwrap().insert(format!("$gate_{}", gate_slot), gate_slot);
+        self.local_vars.last_mut().unwrap().insert(format!("$gate_{}", gate_slot), LocalInfo { slot: gate_slot, ty: Type::Int });
         self.emit(Instr::SetLocal(gate_slot));
         
         // 3. Begin Operation
@@ -327,7 +327,7 @@ impl<'a> Lowerer<'a> {
         // 4. Bind view to local
         self.local_vars.push(HashMap::new());
         let view_slot = self.get_next_local_slot();
-        self.local_vars.last_mut().unwrap().insert(n.binding.to_string(), view_slot);
+        self.local_vars.last_mut().unwrap().insert(n.binding.to_string(), LocalInfo { slot: view_slot, ty: Type::Int });
         self.emit(Instr::SetLocal(view_slot));
         
         // 5. Body
@@ -449,8 +449,7 @@ impl<'a> Lowerer<'a> {
                         return Ok(());
                     }
                 };
-                let id = self.program.const_pool.add_int(val);
+                self.emit(Instr::PushBounded(val));
-                self.emit(Instr::PushConst(id));
                 return Ok(());
             }
         }
@@ -574,6 +573,12 @@ impl<'a> Lowerer<'a> {
                     }
                 }
 
+                // Check for .raw()
+                if ma.member == "raw" {
+                    self.lower_node(&ma.object)?;
+                    return Ok(());
+                }
+
                 // Check for Color.rgb
                 if ma.member == "rgb" {
                     if let Node::Ident(obj_id) = &*ma.object {
@@ -582,7 +587,7 @@ impl<'a> Lowerer<'a> {
                                 // Try to get literal values for r, g, b
                                 let mut literals = Vec::new();
                                 for arg in &n.args {
-                                    if let Node::IntLiteral(lit) = arg {
+                                    if let Node::IntLit(lit) = arg {
                                         literals.push(Some(lit.value));
                                     } else {
                                         literals.push(None);
@@ -594,8 +599,7 @@ impl<'a> Lowerer<'a> {
                                     let g6 = (g & 0xFF) >> 2;
                                     let b5 = (b & 0xFF) >> 3;
                                     let rgb565 = (r5 << 11) | (g6 << 5) | b5;
-                                    let id = self.program.const_pool.add_int(rgb565);
+                                    self.emit(Instr::PushBounded(rgb565 as u32));
-                                    self.emit(Instr::PushConst(id));
                                     return Ok(());
                                 }
                             }
@@ -615,8 +619,10 @@ impl<'a> Lowerer<'a> {
                     let is_shadowed = self.find_local(&obj_id.name).is_some();
 
                     if is_host_contract && !is_shadowed {
-                        if let Some(syscall_id) = self.contract_registry.resolve(&obj_id.name, &ma.member) {
+                        if let Some(method) = self.contract_registry.get_method(&obj_id.name, &ma.member) {
-                            self.emit(Instr::HostCall(syscall_id));
+                            let ir_ty = self.convert_pbs_type(&method.return_type);
+                            let return_slots = self.get_type_slots(&ir_ty);
+                            self.emit(Instr::HostCall(method.id, return_slots));
                             return Ok(());
                         } else {
                              self.error("E_RESOLVE_UNDEFINED", format!("Undefined contract member '{}.{}'", obj_id.name, ma.member), ma.span);
@@ -810,11 +816,37 @@ impl<'a> Lowerer<'a> {
 
     fn get_type_slots(&self, ty: &Type) -> u32 {
         match ty {
+            Type::Void => 0,
             Type::Struct(name) => self.struct_slots.get(name).cloned().unwrap_or(1),
             Type::Array(_, size) => *size,
             _ => 1,
         }
     }
+
+    fn convert_pbs_type(&self, ty: &PbsType) -> Type {
+        match ty {
+            PbsType::Int => Type::Int,
+            PbsType::Float => Type::Float,
+            PbsType::Bool => Type::Bool,
+            PbsType::String => Type::String,
+            PbsType::Void => Type::Void,
+            PbsType::None => Type::Void,
+            PbsType::Bounded => Type::Bounded,
+            PbsType::Optional(inner) => Type::Optional(Box::new(self.convert_pbs_type(inner))),
+            PbsType::Result(ok, err) => Type::Result(
+                Box::new(self.convert_pbs_type(ok)),
+                Box::new(self.convert_pbs_type(err)),
+            ),
+            PbsType::Struct(name) => Type::Struct(name.clone()),
+            PbsType::Service(name) => Type::Service(name.clone()),
+            PbsType::Contract(name) => Type::Contract(name.clone()),
+            PbsType::ErrorType(name) => Type::ErrorType(name.clone()),
+            PbsType::Function { params, return_type } => Type::Function {
+                params: params.iter().map(|p| self.convert_pbs_type(p)).collect(),
+                return_type: Box::new(self.convert_pbs_type(return_type)),
+            },
+        }
+    }
 }
 
 #[cfg(test)]
@@ -1013,10 +1045,10 @@ mod tests {
         let func = &program.modules[0].functions[0];
         let instrs: Vec<_> = func.blocks.iter().flat_map(|b| b.instrs.iter()).collect();
         
-        // Gfx.clear -> 0x1001
+        // Gfx.clear -> 0x1010
-        assert!(instrs.iter().any(|i| matches!(i, ir_core::Instr::HostCall(0x1001))));
+        assert!(instrs.iter().any(|i| matches!(i, ir_core::Instr::HostCall(0x1010, 0))));
         // Log.write -> 0x5001
-        assert!(instrs.iter().any(|i| matches!(i, ir_core::Instr::HostCall(0x5001))));
+        assert!(instrs.iter().any(|i| matches!(i, ir_core::Instr::HostCall(0x5001, 0))));
     }
 
     #[test]

crates/prometeu-compiler/src/frontends/pbs/typecheck.rs

@@ -614,6 +614,20 @@ impl<'a> TypeChecker<'a> {
         if expected == found {
             return true;
         }
+
+        // Color is basically a bounded (u16)
+        if matches!(expected, PbsType::Struct(s) if s == "Color") && *found == PbsType::Bounded {
+            return true;
+        }
+        if *expected == PbsType::Bounded && matches!(found, PbsType::Struct(s) if s == "Color") {
+            return true;
+        }
+
+        // Allow int as Color/bounded (for compatibility)
+        if (matches!(expected, PbsType::Struct(s) if s == "Color") || *expected == PbsType::Bounded) && *found == PbsType::Int {
+            return true;
+        }
+
         match (expected, found) {
             (PbsType::Optional(_), PbsType::None) => true,
             (PbsType::Optional(inner), found) => self.is_assignable(inner, found),

crates/prometeu-compiler/src/ir_core/instr.rs

@@ -6,10 +6,12 @@ use super::ids::{ConstId, FieldId, FunctionId, TypeId, ValueId};
 pub enum Instr {
     /// Placeholder for constant loading.
     PushConst(ConstId),
+    /// Push a bounded value (0..0xFFFF).
+    PushBounded(u32),
     /// Placeholder for function calls.
     Call(FunctionId, u32),
-    /// Host calls (syscalls).
+    /// Host calls (syscalls). (id, return_slots)
-    HostCall(u32),
+    HostCall(u32, u32),
     /// Variable access.
     GetLocal(u32),
     SetLocal(u32),

crates/prometeu-compiler/src/ir_vm/instr.rs

@@ -44,6 +44,8 @@ pub enum InstrKind {
     
     /// Pushes a constant from the pool onto the stack.
     PushConst(ConstId),
+    /// Pushes a bounded value (0..0xFFFF) onto the stack.
+    PushBounded(u32),
     /// Pushes a boolean onto the stack.
     PushBool(bool),
     /// Pushes a `null` value onto the stack.
@@ -203,6 +205,7 @@ mod tests {
             InstrKind::Nop,
             InstrKind::Halt,
             InstrKind::PushConst(ConstId(0)),
+            InstrKind::PushBounded(0),
             InstrKind::PushBool(true),
             InstrKind::PushNull,
             InstrKind::Pop,
@@ -261,6 +264,9 @@ mod tests {
   {
     "PushConst": 0
   },
+  {
+    "PushBounded": 0
+  },
   {
     "PushBool": true
   },

crates/prometeu-compiler/src/lowering/core_to_vm.rs

@@ -92,6 +92,10 @@ pub fn lower_function(
                     stack_types.push(ty);
                     vm_func.body.push(ir_vm::Instruction::new(ir_vm::InstrKind::PushConst(ir_vm::ConstId(id.0)), None));
                 }
+                ir_core::Instr::PushBounded(val) => {
+                    stack_types.push(ir_core::Type::Bounded);
+                    vm_func.body.push(ir_vm::Instruction::new(ir_vm::InstrKind::PushBounded(*val), None));
+                }
                 ir_core::Instr::Call(func_id, arg_count) => {
                     // Pop arguments from type stack
                     for _ in 0..*arg_count {
@@ -106,10 +110,12 @@ pub fn lower_function(
                         arg_count: *arg_count 
                     }, None));
                 }
-                ir_core::Instr::HostCall(id) => {
+                ir_core::Instr::HostCall(id, slots) => {
                     // HostCall return types are not easily known without a registry,
-                    // but usually they return Int or Void in v0.
+                    // but we now pass the number of slots.
+                    for _ in 0..*slots {
                         stack_types.push(ir_core::Type::Int); 
+                    }
                     vm_func.body.push(ir_vm::Instruction::new(ir_vm::InstrKind::Syscall(*id), None));
                 }
                 ir_core::Instr::GetLocal(slot) => {
@@ -366,6 +372,7 @@ fn lower_type(ty: &ir_core::Type) -> ir_vm::Type {
         ir_core::Type::Float => ir_vm::Type::Float,
         ir_core::Type::Bool => ir_vm::Type::Bool,
         ir_core::Type::String => ir_vm::Type::String,
+        ir_core::Type::Bounded => ir_vm::Type::Bounded,
         ir_core::Type::Optional(inner) => ir_vm::Type::Array(Box::new(lower_type(inner))),
         ir_core::Type::Result(ok, _) => lower_type(ok),
         ir_core::Type::Struct(_)
@@ -411,7 +418,7 @@ mod tests {
                         Block {
                             id: 1,
                             instrs: vec![
-                                Instr::HostCall(42),
+                                Instr::HostCall(42, 1),
                             ],
                             terminator: Terminator::Return,
                         },

crates/prometeu-core/src/prometeu_os/prometeu_os.rs

@@ -710,6 +710,55 @@ mod tests {
             _ => panic!("Expected Trap"),
         }
     }
+
+    #[test]
+    fn test_gfx_clear565_syscall() {
+        let mut hw = crate::Hardware::new();
+        let mut os = PrometeuOS::new(None);
+        let mut stack = Vec::new();
+        
+        // Success case
+        let args = vec![Value::Bounded(0xF800)]; // Red
+        {
+            let mut ret = HostReturn::new(&mut stack);
+            os.syscall(Syscall::GfxClear565 as u32, &args, &mut ret, &mut hw).unwrap();
+        }
+        assert_eq!(stack.len(), 0); // void return
+
+        // OOB case
+        let args = vec![Value::Bounded(0x10000)]; 
+        {
+            let mut ret = HostReturn::new(&mut stack);
+            let res = os.syscall(Syscall::GfxClear565 as u32, &args, &mut ret, &mut hw);
+            assert!(res.is_err());
+            match res.err().unwrap() {
+                VmFault::Trap(trap, _) => assert_eq!(trap, prometeu_bytecode::abi::TRAP_OOB),
+                _ => panic!("Expected Trap OOB"),
+            }
+        }
+    }
+
+    #[test]
+    fn test_input_snapshots_syscalls() {
+        let mut hw = crate::Hardware::new();
+        let mut os = PrometeuOS::new(None);
+        
+        // Pad snapshot
+        let mut stack = Vec::new();
+        {
+            let mut ret = HostReturn::new(&mut stack);
+            os.syscall(Syscall::InputPadSnapshot as u32, &[], &mut ret, &mut hw).unwrap();
+        }
+        assert_eq!(stack.len(), 48);
+
+        // Touch snapshot
+        let mut stack = Vec::new();
+        {
+            let mut ret = HostReturn::new(&mut stack);
+            os.syscall(Syscall::InputTouchSnapshot as u32, &[], &mut ret, &mut hw).unwrap();
+        }
+        assert_eq!(stack.len(), 6);
+    }
 }
 
 impl NativeInterface for PrometeuOS {
@@ -861,6 +910,17 @@ impl NativeInterface for PrometeuOS {
                 ret.push_null();
                 Ok(())
             }
+            // gfx.clear565(color_u16) -> void
+            Syscall::GfxClear565 => {
+                let color_val = expect_int(args, 0)? as u32;
+                if color_val > 0xFFFF {
+                    return Err(VmFault::Trap(prometeu_bytecode::abi::TRAP_OOB, "Color value out of bounds (bounded)".into()));
+                }
+                let color = Color::from_raw(color_val as u16);
+                hw.gfx_mut().clear(color);
+                // No return value for void
+                Ok(())
+            }
 
             // --- Input Syscalls ---
 
@@ -914,6 +974,30 @@ impl NativeInterface for PrometeuOS {
                 ret.push_int(hw.touch().f.hold_frames as i64);
                 Ok(())
             }
+            Syscall::InputPadSnapshot => {
+                let pad = hw.pad();
+                for btn in [
+                    &pad.up, &pad.down, &pad.left, &pad.right,
+                    &pad.a, &pad.b, &pad.x, &pad.y,
+                    &pad.l, &pad.r, &pad.start, &pad.select,
+                ] {
+                    ret.push_bool(btn.pressed);
+                    ret.push_bool(btn.released);
+                    ret.push_bool(btn.down);
+                    ret.push_int(btn.hold_frames as i64);
+                }
+                Ok(())
+            }
+            Syscall::InputTouchSnapshot => {
+                let touch = hw.touch();
+                ret.push_bool(touch.f.pressed);
+                ret.push_bool(touch.f.released);
+                ret.push_bool(touch.f.down);
+                ret.push_int(touch.f.hold_frames as i64);
+                ret.push_int(touch.x as i64);
+                ret.push_int(touch.y as i64);
+                Ok(())
+            }
 
             // --- Audio Syscalls ---
 

docs/specs/pbs/files/PRs para Junie Global.md

@@ -1,28 +0,0 @@
-> **Status:** Ready to copy/paste to Junie
->
-> **Goal:** expose hardware types **1:1** to PBS and VM as **SAFE builtins** (stack/value), *not* HIP.
->
-> **Key constraint:** Prometeu does **not** have `u16` as a primitive. Use `bounded` for 16-bit-ish hardware scalars.
->
-> **Deliverables (in order):**
->
-> 1. VM hostcall ABI supports returning **flattened SAFE structs** (multi-slot).
-> 2. PBS prelude defines `Color`, `ButtonState`, `Pad`, `Touch` using `bounded`.
-> 3. Lowering emits deterministic syscalls for `Gfx.clear(Color)` and `Input.pad()/touch()`.
-> 4. Runtime implements the syscalls and an integration cartridge validates behavior.
->
-> **Hard rules (do not break):**
->
-> * No heap, no gates, no HIP for these types.
-> * No `u16` anywhere in PBS surface.
-> * Returned structs are *values*, copied by stack.
-> * Every PR must include tests.
-> * No renumbering opcodes; append only.
-
-## Notes / Forbidden
-
-* DO NOT introduce `u16` into PBS.
-* DO NOT allocate heap for these types.
-* DO NOT encode `Pad`/`Touch` as gates.
-* DO NOT change unrelated opcodes.
-* DO NOT add “convenient” APIs not listed above.

docs/specs/pbs/files/PRs para Junie.md

@@ -1,145 +0,0 @@
-## PR-03 — Lowering: Host Contracts for Gfx/Input using deterministic syscalls
-
-### Goal
-
-Map PBS host contracts to stable syscalls with a deterministic ABI.
-
-### Required host contracts in PBS surface
-
-```pbs
-pub declare contract Gfx host
-{
-  fn clear(color: Color): void;
-}
-
-pub declare contract Input host
-{
-  fn pad(): Pad;
-  fn touch(): Touch;
-}
-```
-
-### Required lowering rules
-
-1. `Gfx.clear(color)`
-
-* Emit `SYSCALL_GFX_CLEAR`
-* ABI: args = [Color.raw] as `bounded`
-* returns: void
-
-2. `Input.pad()`
-
-* Emit `SYSCALL_INPUT_PAD`
-* args: none
-* returns: flattened `Pad` in field order as declared
-
-3. `Input.touch()`
-
-* Emit `SYSCALL_INPUT_TOUCH`
-* args: none
-* returns: flattened `Touch` in field order as declared
-
-### Flattening order (binding)
-
-**ButtonState** returns 4 slots in order:
-
-1. pressed (bool)
-2. released (bool)
-3. down (bool)
-4. hold_frames (bounded)
-
-**Pad** returns 12 ButtonState blocks in this exact order:
-`up, down, left, right, a, b, x, y, l, r, start, select`
-
-**Touch** returns:
-
-1. f (ButtonState block)
-2. x (int)
-3. y (int)
-
-### Tests (mandatory)
-
-* Lowering golden test: `Gfx.clear(Color.WHITE)` emits `SYSCALL_GFX_CLEAR` with 1 arg.
-* Lowering golden test: `Input.pad()` emits `SYSCALL_INPUT_PAD` and assigns to local.
-* Lowering golden test: `Input.touch()` emits `SYSCALL_INPUT_TOUCH`.
-
-### Non-goals
-
-* No runtime changes
-* No VM heap
-
----
-
-## PR-04 — Runtime: Implement syscalls for Color/Gfx and Input pad/touch + integration cartridge
-
-### Goal
-
-Make the new syscalls actually work and prove them with an integration test cartridge.
-
-### Required syscall implementations
-
-#### 1) `SYSCALL_GFX_CLEAR`
-
-* Read 1 arg: `bounded` raw color
-* Convert to `u16` internally (runtime-only)
-
-  * If raw > 0xFFFF, trap `TRAP_OOB` or `TRAP_TYPE` (choose one and document)
-* Fill framebuffer with that RGB565 value
-
-#### 2) `SYSCALL_INPUT_PAD`
-
-* No args
-* Snapshot the current runtime `Pad` and push a flattened `Pad` return:
-
-  * For each button: pressed, released, down, hold_frames
-  * hold_frames pushed as `bounded`
-
-#### 3) `SYSCALL_INPUT_TOUCH`
-
-* No args
-* Snapshot `Touch` and push flattened `Touch` return:
-
-  * f ButtonState
-  * x int
-  * y int
-
-### Integration cartridge (mandatory)
-
-Add `test-cartridges/hw_hello` (or similar) with:
-
-```pbs
-fn frame(): void
-{
-  // 1) clear screen white
-  Gfx.clear(Color.WHITE);
-
-  // 2) read pad and branch
-  let p: Pad = Input.pad();
-  if p.any() {
-    Gfx.clear(Color.MAGENTA);
-  }
-
-  // 3) read touch and branch on f.down
-  let t: Touch = Input.touch();
-  if t.f.down {
-    // choose a third color to prove the struct returned correctly
-    Gfx.clear(Color.BLUE);
-  }
-}
-```
-
-### Acceptance criteria
-
-* Cartridge runs without VM faults.
-* With no input: screen is WHITE.
-* With any pad button held: screen becomes MAGENTA.
-* With touch f.down: screen becomes BLUE.
-
-### Tests (mandatory)
-
-* Runtime unit test: `SYSCALL_GFX_CLEAR` rejects raw > 0xFFFF deterministically.
-* Runtime unit test: `SYSCALL_INPUT_PAD` returns correct number of stack slots (48).
-* Runtime unit test: `SYSCALL_INPUT_TOUCH` returns correct number of stack slots (4 + 2 = 6).
-
----
-

test-cartridges/hw_hello/src/main.pbs

@@ -0,0 +1,14 @@
+fn frame(): void
+{
+  Gfx.clear(Color.WHITE);
+
+  let p: Pad = Input.pad();
+  if p.any() {
+    Gfx.clear(Color.MAGENTA);
+  }
+
+  let t: Touch = Input.touch();
+  if t.f.down {
+    Gfx.clear(Color.BLUE);
+  }
+}