better font rendering and start of z80 access

text_mode.h

@@ -3,8 +3,22 @@
 #include "cvideo.h"
 
 // Text mode config
-#define CHARS_PER_LINE 32
-#define CHAR_LINES 20
+#define CHARS_PER_LINE 60
+#define CHAR_LINES 24
+#define CHAR_SCALE 2
+
+// Text origin in framebuffer pixels. Set both to 0 for the top-left corner.
+#define TEXT_MARGIN_LEFT (30)
+#define TEXT_MARGIN_TOP (42)
+
+// Crop glyph pixels before scaling. Padding is split across both sides; for
+// odd values, the extra pixel is removed from the right or bottom.
+#define GLYPH_PADDING_X 1
+#define GLYPH_PADDING_Y 4
+
+// Set to 1 for a white background with black text, or 0 for the default
+// black background with white text.
+#define TEXT_INVERT_COLOURS 0
 
 typedef char text_mode_buffer_t[CHAR_LINES][CHARS_PER_LINE];