98 happyhop
98 : happyhop
- Author: deadcast2
- Description: A bouncing smiley face rendered live to VGA via the standard TT VGA PMOD. No framebuffer; pixels computed on the fly.
- GitHub repository
- Open in 3D viewer
- Open in VGA Playground
- Clock: 25175000 Hz
How it works
A 16x16 smiley sprite bounces around a 640x480 VGA screen. No framebuffer
— each pixel is computed live from the beam position and the ball's (x, y).
The smiley blinks every ~2 seconds and its eyes shift toward the direction
of motion.
How to test
Plug the TT VGA PMOD into the chip's output PMOD, connect a 640x480 @ 60 Hz monitor, power on. No input controls.
External hardware
- TT VGA PMOD (Matt Venn)
- VGA monitor at 640x480 @ 60 Hz
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | R1 | ||
| 1 | G1 | ||
| 2 | B1 | ||
| 3 | VSync | ||
| 4 | R0 | ||
| 5 | G0 | ||
| 6 | B0 | ||
| 7 | HSync |