diff --git a/asminc/atari7800.inc b/asminc/atari7800.inc
index a7625aa8a..5b725c1c3 100644
--- a/asminc/atari7800.inc
+++ b/asminc/atari7800.inc
@@ -6,3 +6,8 @@
 .include "atari7800_tia.inc"
 .include "atari7800_riot.inc"
 .include "atari7800_maria.inc"
+
+; constants for the conio implementation
+charsperline	= 20
+screenrows	= 28
+
diff --git a/cfg/atari7800.cfg b/cfg/atari7800.cfg
index 4d20ab0d9..835d0b18f 100644
--- a/cfg/atari7800.cfg
+++ b/cfg/atari7800.cfg
@@ -10,7 +10,7 @@ SYMBOLS {
     __ENCRYPT_BOTTOM__:   value = $ff7a, type = export;
     __ENCRYPT_SIZE__:     value = $80, type = export;
     __MEMORY_TOP__:       value = __ENCRYPT_BOTTOM__, type = export;
-    __INIT_SIZE__:        value = 121, type = export;
+    __INIT_SIZE__:        value = 139, type = export;
     __MEMORY_INIT__:      value = __MEMORY_TOP__ - __INIT_SIZE__, type = export;
     __MEMORY_BOTTOM__:    value = $10000 - __CARTSIZE__, type = weak;
     __FREE_ROM_SIZE__:    value = __MEMORY_INIT__ - __MEMORY_BOTTOM__, type = export;