+
+XWR0 = $10 ; Write a char in channel 0
+XWR1 = $11 ; Write a char in channel 1
+XWR2 = $12 ; Write a char in channel 2
+XWR3 = $13 ; Write a char in channel 3
+
+XWSTR0 = $14 ; Write a string in text mode channel 0
+XWSTR1 = $15 ; Write a string in text mode channel 1
+XWSTR2 = $16 ; Write a string in text mode channel 2
+XWSTR3 = $17 ; Write a string in text mode channel 3
+
+XDECAL = $18
+