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Hacks in a basic effort at dual playfields.

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This commit is contained in:
Thomas Harte 2021-11-16 18:26:27 -05:00
parent 2a3a7fa8a0
commit 6df0227ab1
1 changed files with 34 additions and 4 deletions
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38
Machines/Amiga/Chipset.cpp
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@ -8,7 +8,10 @@
#include "Chipset.hpp"
//#ifndef NDEBUG
//#define NDEBUG
//#endif
#define LOG_PREFIX "[Amiga chipset] "
#include "../../Outputs/Log.hpp"
@ -241,10 +244,35 @@ template <int cycle> void Chipset::output() {
const uint32_t source = bitplane_pixels_.get(is_high_res_);
// TODO: dump bit 5 if this Chipset doesn't support extra half-bright.
pixels_[0] = swizzled_palette_[source >> 24];
pixels_[1] = swizzled_palette_[(source >> 16) & 0xff];
pixels_[2] = swizzled_palette_[(source >> 8) & 0xff];
pixels_[3] = swizzled_palette_[source & 0xff];
if(dual_playfields_) {
// Dense: just write both.
if(even_over_odd_) {
pixels_[0] = palette_[8 + (source >> 27) & 7];
pixels_[1] = palette_[8 + (source >> 19) & 7];
pixels_[2] = palette_[8 + (source >> 11) & 7];
pixels_[3] = palette_[8 + (source >> 3) & 7];
if(palette_[(source >> 24) & 7]) pixels_[0] = palette_[(source >> 24) & 7];
if(palette_[(source >> 16) & 7]) pixels_[1] = palette_[(source >> 16) & 7];
if(palette_[(source >> 8) & 7]) pixels_[2] = palette_[(source >> 8) & 7];
if(palette_[source & 7]) pixels_[3] = palette_[source & 7];
} else {
pixels_[0] = palette_[(source >> 24) & 7];
pixels_[1] = palette_[(source >> 16) & 7];
pixels_[2] = palette_[(source >> 8) & 7];
pixels_[3] = palette_[source & 7];
if(palette_[8 + (source >> 27) & 7]) pixels_[0] = palette_[8 + (source >> 27) & 7];
if(palette_[8 + (source >> 19) & 7]) pixels_[1] = palette_[8 + (source >> 19) & 7];
if(palette_[8 + (source >> 11) & 7]) pixels_[2] = palette_[8 + (source >> 11) & 7];
if(palette_[8 + (source >> 3) & 7]) pixels_[3] = palette_[8 + (source >> 3) & 7];
}
} else {
pixels_[0] = swizzled_palette_[source >> 24];
pixels_[1] = swizzled_palette_[(source >> 16) & 0xff];
pixels_[2] = swizzled_palette_[(source >> 8) & 0xff];
pixels_[3] = swizzled_palette_[source & 0xff];
}
for(int c = 3; c >= 0; --c) {
const auto data = sprite_shifters_[c].get();
@ -804,6 +832,8 @@ void Chipset::perform(const CPU::MC68000::Microcycle &cycle) {
hold_and_modify_ = value & 0x0800;
dual_playfields_ = value & 0x0400;
interlace_ = value & 0x0004;
// LOG("New video control at " << std::dec << y_ << "; high res: " << is_high_res_ << " HAM: " << hold_and_modify_ << " dual: " << dual_playfields_ << " interlace: " << interlace_);
} break;
case Write(0x102): { // BPLCON1
const uint8_t delay = cycle.value8_low();