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Adds an incorrect assumed-pixel-mode serialiser.

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This actually shows something a bit like the Enterprise boot logo.
This commit is contained in:
Thomas Harte 2021-06-15 22:31:50 -04:00
parent e94e051c87
commit e5e988b28f
2 changed files with 28 additions and 3 deletions
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29
Machines/Enterprise/Nick.cpp
View File

@ -187,8 +187,33 @@ void Nick::run_for(HalfCycles duration) {
// TODO: real pixels.
if(allocated_pointer_) {
for(int c = 0; c < next_event - window; c++) {
pixel_pointer_[0] = uint16_t(0xfff ^ (window + c));
++pixel_pointer_;
// pixel_pointer_[0] = uint16_t(0xfff ^ (window + c));
// ++pixel_pointer_;
// Hard-coded here: 1bpp, pixel mode.
const uint8_t pixels[2] = { ram_[line_data_pointer_[0]], ram_[line_data_pointer_[0]+1] };
line_data_pointer_[0] += 2;
pixel_pointer_[0] = (pixels[0] & 0x80) ? 0xffff : 0x0000;
pixel_pointer_[1] = (pixels[0] & 0x40) ? 0xffff : 0x0000;
pixel_pointer_[2] = (pixels[0] & 0x20) ? 0xffff : 0x0000;
pixel_pointer_[3] = (pixels[0] & 0x10) ? 0xffff : 0x0000;
pixel_pointer_[4] = (pixels[0] & 0x08) ? 0xffff : 0x0000;
pixel_pointer_[5] = (pixels[0] & 0x04) ? 0xffff : 0x0000;
pixel_pointer_[6] = (pixels[0] & 0x02) ? 0xffff : 0x0000;
pixel_pointer_[7] = (pixels[0] & 0x01) ? 0xffff : 0x0000;
pixel_pointer_[8] = (pixels[1] & 0x80) ? 0xffff : 0x0000;
pixel_pointer_[9] = (pixels[1] & 0x40) ? 0xffff : 0x0000;
pixel_pointer_[10] = (pixels[1] & 0x20) ? 0xffff : 0x0000;
pixel_pointer_[11] = (pixels[1] & 0x10) ? 0xffff : 0x0000;
pixel_pointer_[12] = (pixels[1] & 0x08) ? 0xffff : 0x0000;
pixel_pointer_[13] = (pixels[1] & 0x04) ? 0xffff : 0x0000;
pixel_pointer_[14] = (pixels[1] & 0x02) ? 0xffff : 0x0000;
pixel_pointer_[15] = (pixels[1] & 0x01) ? 0xffff : 0x0000;
pixel_pointer_ += 16;
// TODO: possibly flush here?
}
} else {
pixel_pointer_ += next_event - window;

2
Machines/Enterprise/Nick.hpp
View File

@ -68,7 +68,7 @@ class Nick {
void flush_border();
// The destination for new pixels.
static constexpr int allocation_size = 320;
static constexpr int allocation_size = 800; // TODO: pick an appropriate length once the serialiser is working correctly.
uint16_t *pixel_pointer_ = nullptr, *allocated_pointer_ = nullptr;
int pixel_duration_ = 0;
void flush_pixels();