Refact INKEY routine

Author: boriel

src/arch/zx48k/backend/runtime/io.py

@@ -33,6 +33,9 @@ class IOLabels:
     DRAW3 = f"{NAMESPACE}DRAW3"
     PLOT = f"{NAMESPACE}PLOT"
 
+    # Keyboard
+    INKEY = f"{NAMESPACE}INKEY"
+
     # Print ("console")
     PRINTI16 = f"{NAMESPACE}__PRINTI16"
     PRINTI32 = f"{NAMESPACE}__PRINTI32"
@@ -81,6 +84,8 @@ class IOLabels:
     IOLabels.DRAW3: 'draw3.asm',
     IOLabels.PLOT: 'plot.asm',
 
+    IOLabels.INKEY: 'inkey.asm',
+
     IOLabels.LOAD_CODE: 'load.asm',
     IOLabels.SAVE_CODE: 'save.asm',
 

src/arch/zx48k/translator.py

@@ -1224,8 +1224,7 @@ class BuiltinTranslator(TranslatorVisitor):
 
     # region STRING Functions
     def visit_INKEY(self, node):
-        self.ic_call('INKEY', Type.string.size)
-        backend.REQUIRES.add('inkey.asm')
+        self.runtime_call(RuntimeLabel.INKEY, Type.string.size)
 
     def visit_IN(self, node):
         self.ic_in(node.children[0].t)