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Display properly from greater RAM sizes.

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This commit is contained in:
Thomas Harte 2022-08-10 16:36:11 -04:00
parent b6f45d9a90
commit e2a8b26b57
2 changed files with 4 additions and 2 deletions
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5
Machines/Atari/ST/Video.cpp
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@ -130,8 +130,9 @@ Video::Video() :
crt_.set_visible_area(crt_.get_rect_for_area(33, 260, 440, 1700, 4.0f / 3.0f)); crt_.set_visible_area(crt_.get_rect_for_area(33, 260, 440, 1700, 4.0f / 3.0f));
} }
void Video::set_ram(uint16_t *ram, size_t) { void Video::set_ram(uint16_t *ram, size_t size) {
ram_ = ram; ram_ = ram;
ram_mask_ = int((size >> 1) - 1);
} }
void Video::set_scan_target(Outputs::Display::ScanTarget *scan_target) { void Video::set_scan_target(Outputs::Display::ScanTarget *scan_target) {
@ -202,7 +203,7 @@ void Video::run_for(HalfCycles duration) {
const int end_column = (since_load + run_length - 1) >> 3; const int end_column = (since_load + run_length - 1) >> 3;
while(start_column != end_column) { while(start_column != end_column) {
data_latch_[data_latch_position_] = ram_[current_address_ & 262143]; data_latch_[data_latch_position_] = ram_[current_address_ & ram_mask_];
data_latch_position_ = (data_latch_position_ + 1) & 127; data_latch_position_ = (data_latch_position_ + 1) & 127;
++current_address_; ++current_address_;
++start_column; ++start_column;

1
Machines/Atari/ST/Video.hpp
View File

@ -138,6 +138,7 @@ class Video {
int current_address_ = 0; int current_address_ = 0;
uint16_t *ram_ = nullptr; uint16_t *ram_ = nullptr;
int ram_mask_ = 0;
int x_ = 0, y_ = 0, next_y_ = 0; int x_ = 0, y_ = 0, next_y_ = 0;
bool load_ = false; bool load_ = false;