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Starts to reimplement Master System output.

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This commit is contained in:
Thomas Harte 2018-10-03 23:13:21 -04:00
parent 252f47a425
commit 05248ab990
2 changed files with 86 additions and 61 deletions
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138
Components/9918/9918.cpp
View File

@ -256,7 +256,7 @@ void TMS9918::run_for(const HalfCycles cycles) {
mode_timing_.next_border_column,
if(start == mode_timing_.first_pixel_output_column) {
pixel_target_ = reinterpret_cast<uint32_t *>(
crt_->allocate_write_area(static_cast<unsigned int>(mode_timing_.next_border_column - mode_timing_.first_pixel_output_column))
crt_->allocate_write_area(static_cast<unsigned int>(mode_timing_.next_border_column - mode_timing_.first_pixel_output_column) + 8) // TODO: the +8 is really for the SMS only; make it optional.
);
}
@ -276,12 +276,6 @@ void TMS9918::run_for(const HalfCycles cycles) {
const unsigned int length = static_cast<unsigned int>(mode_timing_.next_border_column - mode_timing_.first_pixel_output_column);
crt_->output_data(length * 4, length);
pixel_target_ = nullptr;
#ifdef DEBUG
memset(pattern_names_, sizeof(pattern_names_), 0xff);
memset(pattern_buffer_, sizeof(pattern_buffer_), 0xff);
memset(colour_buffer_, sizeof(colour_buffer_), 0xff);
#endif
}
);
@ -293,48 +287,20 @@ void TMS9918::run_for(const HalfCycles cycles) {
#undef intersect
// -----------------
// End video stream.
// -----------------
column_ = end_column; // column_ is now the column that has been reached in this line.
int_cycles -= cycles_left; // Count down duration to run for.
/* if(row_ < 192 && current_mode_ != ScreenMode::Blank) {
/*
// --------------
// Output pixels.
// --------------
if(output_column_ >= first_pixel_column_) {
int pixels_end = std::min(first_right_border_column_, column_);
if(output_column_ < pixels_end) {
switch(line_mode_) {
default: break;
case LineMode::SMS: {
if(pixel_target_) {
const int pixels_left = pixels_end - output_column_;
const int pixel_location = output_column_ - first_pixel_column_;
const int reverses[2] = {0, 7};
for(int c = 0; c < pixels_left; ++c) {
const int column = (pixel_location + c) >> 3;
const int shift = 4 + (((pixel_location + c) & 7) ^ reverses[(master_system_.names[column].flags&2) >> 1]);
int value =
(
(
((master_system_.tile_graphics[column][3] << shift) & 0x800) |
((master_system_.tile_graphics[column][2] << (shift - 1)) & 0x400) |
((master_system_.tile_graphics[column][1] << (shift - 2)) & 0x200) |
((master_system_.tile_graphics[column][0] << (shift - 3)) & 0x100)
) >> 8
) | ((master_system_.names[column].flags&0x08) << 1);
pixel_target_[c] = master_system_.colour_ram[value];
}
pixel_target_ += pixels_left;
}
output_column_ = pixels_end;
}
break;
case LineMode::Character: {
// If this is the start of the visible area, seed sprite shifter positions.
@ -451,18 +417,8 @@ void TMS9918::run_for(const HalfCycles cycles) {
} break;
}
if(output_column_ == first_right_border_column_) {
const unsigned int data_length = static_cast<unsigned int>(first_right_border_column_ - first_pixel_column_);
crt_->output_data(data_length * 4, data_length);
pixel_target_ = nullptr;
}
}
}
}*/
// -----------------
// End video stream.
// -----------------
@ -660,9 +616,11 @@ bool TMS9918::get_interrupt_line() {
// MARK: -
void Base::draw_tms_character(int start, int end) {
for(int c = start; c < end; ++c) {
pixel_target_[c] = static_cast<uint32_t>(c * 0x01010101);
}
// if(!start) printf("\n");
// printf("%d to %d | ", start, end);
// for(int c = start; c < end; ++c) {
// pixel_target_[c] = static_cast<uint32_t>(c * 0x01010101);
// }
}
void Base::draw_tms_text(int start, int end) {
@ -689,7 +647,75 @@ void Base::draw_tms_text(int start, int end) {
}
void Base::draw_sms(int start, int end) {
for(int c = start; c < end; ++c) {
pixel_target_[c] = static_cast<uint32_t>(c * 0x01010101);
if(!start) {
pixel_target_ += master_system_.horizontal_scroll & 7;
}
const int shift = start & 7;
int byte_column = start >> 3;
int pixels_left = end - start;
int length = std::min(pixels_left, 8 - shift);
uint32_t pattern = *reinterpret_cast<uint32_t *>(master_system_.tile_graphics[byte_column]);
if(master_system_.names[byte_column].flags&2)
pattern >>= shift;
else
pattern <<= shift;
while(true) {
pixels_left -= length;
const uint32_t palette_offset = static_cast<uint32_t>((master_system_.names[byte_column].flags&0x08) << 1);
if(master_system_.names[byte_column].flags&2) {
for(int c = 0; c < length; ++c) {
const uint32_t value =
((pattern & 0x00000001) >> 0) |
((pattern & 0x00000100) >> 6) |
((pattern & 0x00010000) >> 15) |
((pattern & 0x01000000) >> 24) |
palette_offset;
pixel_target_[c] = master_system_.colour_ram[value];
pattern >>= 1;
}
} else {
for(int c = 0; c < length; ++c) {
const uint32_t value =
((pattern & 0x00000080) >> 7) |
((pattern & 0x00008000) >> 14) |
((pattern & 0x00800000) >> 21) |
((pattern & 0x80000000) >> 28) |
palette_offset;
pixel_target_[c] = master_system_.colour_ram[value];
pattern <<= 1;
}
}
pixel_target_ += length;
if(!pixels_left) break;
length = std::min(8, pixels_left);
byte_column++;
pattern = *reinterpret_cast<uint32_t *>(master_system_.tile_graphics[byte_column]);
}
// const int pixels_left = pixels_end - output_column_;
// const int pixel_location = output_column_ - first_pixel_column_;
// const int reverses[2] = {0, 7};
// for(int c = 0; c < pixels_left; ++c) {
// const int column = (pixel_location + c) >> 3;
// const int shift = 4 + (((pixel_location + c) & 7) ^ reverses[(master_system_.names[column].flags&2) >> 1]);
// int value =
// (
// (
// ((master_system_.tile_graphics[column][3] << shift) & 0x800) |
// ((master_system_.tile_graphics[column][2] << (shift - 1)) & 0x400) |
// ((master_system_.tile_graphics[column][1] << (shift - 2)) & 0x200) |
// ((master_system_.tile_graphics[column][0] << (shift - 3)) & 0x100)
// ) >> 8
// ) | ((master_system_.names[column].flags&0x08) << 1);
//
// pixel_target_[c] = master_system_.colour_ram[value];
// }
// for(int c = start; c < end; ++c) {
// pixel_target_[c] = static_cast<uint32_t>(c * 0x01010101);
// }
}

9
Components/9918/Implementation/9918Base.hpp
View File

@ -239,7 +239,7 @@ class Base {
return;
}
mode_timing_.maximum_visible_sprites = 8;
mode_timing_.maximum_visible_sprites = 4;
if(!mode1_enable_ && !mode2_enable_ && !mode3_enable_) {
screen_mode_ = ScreenMode::ColouredText;
return;
@ -268,7 +268,6 @@ class Base {
void external_slot() {
// TODO: write or read a value if one is queued and ready to read/write.
// (and, later: update the command engine, if this is an MSX2).
switch(queued_access_) {
default: return;
@ -473,11 +472,11 @@ class Base {
#define sprite_y_read(location, sprite) \
slot(location):
#define fetch_tile_name(column) pattern_names_[column] = ram_[row_base + column];
#define fetch_tile_name(column) pattern_names_[column] = ram_[(row_base + column) & 0x3fff];
#define fetch_tile(column) {\
colour_buffer_[column] = ram_[colour_base + static_cast<size_t>((pattern_names_[column] << 3) >> colour_name_shift)]; \
pattern_buffer_[column] = ram_[pattern_base + static_cast<size_t>(pattern_names_[column] << 3)]; \
colour_buffer_[column] = ram_[(colour_base + static_cast<size_t>((pattern_names_[column] << 3) >> colour_name_shift)) & 0x3fff]; \
pattern_buffer_[column] = ram_[(pattern_base + static_cast<size_t>(pattern_names_[column] << 3)) & 0x3fff]; \
}
#define background_fetch_block(location, column) \