RGB LEDs in Emu
- smokku
Added HW RGB LEDs display to Emu.
The RGB LEDs use a very simple, yet extensive interface
for an RGB LED chain mapped to $FFA0-$FFA7:
The first four bytes are direct controls of the first four reds,
with values in RGB332 format.
The next four bytes are an interface for all LEDs in the chain.
- You write the requested RGB values to
$FFA5 (R), $FFA6 (G), $FFA7 (B).
- You write the number of the LED you want to set to the selected color to
$FFA4.
This allows control of up to 256 LEDs, including the first three
built into the X65 machine keyboard.
The simple one-byte interface for the first four LEDs is meant to make trivial
LED blinking a single STA operation.