MSX Tier 4: Direct to VDP

The VDP isn’t memory-mapped — it’s a partner you talk to through ports.
You’ll:
- Write bytes into VRAM via ports
$98
(data) and$99
(address) - Set name table data to control characters on screen
- Switch modes and palettes via VDP register writes
- Create tile-based screens and control scrolling manually
This is real graphics programming — indirect, powerful, and deeply MSX.