Make text memory readable

1 files changed, 10 insertions, 0 deletions

diff --git a/atk16_emu/peripherals.py b/atk16_emu/peripherals.py
index b8a5b14..3bc0443 100644
--- a/atk16_emu/peripherals.py
+++ b/atk16_emu/peripherals.py
@@ -72,6 +72,9 @@ class TPU:
     # address: 5 bits y, 6 bits x
     self.text_mem.write(addr, char & 0xFF)
 
+  def read_char(self, addr: int) -> int:
+    return self.text_mem.read(addr)
+
 class Graphics:
   def __init__(self):
     pygame.display.init()
@@ -111,6 +114,9 @@ class Graphics:
     # take only the lower 11 bits
     self.tpu.write_char(addr & 0x7FF, char)
 
+  def read(self, addr: int) -> int:
+    return self.tpu.read_char(addr & 0x7FF)
+
 class DummyGraphics:
   def __init__(self):
     pass
@@ -130,6 +136,10 @@ class DummyGraphics:
   def write(self, addr: int, char: int):
     pass
 
+  def read(self, addr: int) -> int:
+    print("warning: reading from dummy graphics")
+    return 0
+
 class Keyboard:
   def __init__(self, set_irq_line: Callable[[int], None]):
     # mimic electronic behaviour my assigning a random value at start