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Map initial border colour, white and black.

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This commit is contained in:
Thomas Harte 2024-12-12 22:35:50 -05:00
parent c2fc26089e
commit 663acd3810
1 changed files with 19 additions and 3 deletions

22
Machines/Commodore/Plus4/Video.hpp

@ -96,11 +96,27 @@ public:
case 0xff15: case 0xff16: case 0xff17: case 0xff18: case 0xff19: {
raw_background_[size_t(address - 0xff15)] = value;
const uint8_t luminance = uint8_t(
const uint8_t luminance = (value & 0x0f) ? uint8_t(
((value & 0x70) << 1) | ((value & 0x70) >> 2) | ((value & 0x70) >> 5)
);
) : 0;
const auto chrominance = uint8_t([&] {
switch(value & 0x0f) {
default:
printf("Unmapped colour: %d\n", value & 0x0f);
[[fallthrough]];
case 0:
case 1: return 0xff;
// The following have been eyeballed.
// case 5: return 3;
// case 7: return 3;
// case 11: return 3;
case 14: return 5;
}
}());
background_[size_t(address - 0xff15)] = uint16_t(
luminance | 0xff00
luminance | (chrominance << 8)
);
printf("%02x -> %04x\n", value, address);