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Adjusts vertical timing for display height.

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This commit is contained in:
Thomas Harte
2018-10-23 21:20:44 -04:00
parent 90fbad0f1c
commit 2f995eb622
2 changed files with 20 additions and 7 deletions
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24
Components/9918/9918.cpp
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@@ -191,11 +191,27 @@ void TMS9918::run_for(const HalfCycles cycles) {
// --------------------------------------- // ---------------------------------------
// Latch scrolling position, if necessary. // Latch scrolling position, if necessary.
// --------------------------------------- // ---------------------------------------
if(write_pointer_.column < 61 && end_column >= 61) { if(is_sega_vdp(personality_)) {
if(!write_pointer_.row) { if(write_pointer_.column < 61 && end_column >= 61) {
master_system_.latched_vertical_scroll = master_system_.vertical_scroll; if(!write_pointer_.row) {
master_system_.latched_vertical_scroll = master_system_.vertical_scroll;
if(master_system_.mode4_enable) {
mode_timing_.pixel_lines = 192;
if(mode2_enable_ && mode1_enable_) mode_timing_.pixel_lines = 224;
if(mode2_enable_ && mode3_enable_) mode_timing_.pixel_lines = 240;
mode_timing_.sprite_terminator = 0xd0;
if(mode_timing_.pixel_lines != 192) {
mode_timing_.sprite_terminator = 0xf0;
}
mode_timing_.first_vsync_line = (mode_timing_.total_lines + mode_timing_.pixel_lines) >> 1;
mode_timing_.end_of_frame_interrupt_position.row = mode_timing_.pixel_lines + 1;
}
}
line_buffer.latched_horizontal_scroll = master_system_.horizontal_scroll;
} }
line_buffer.latched_horizontal_scroll = master_system_.horizontal_scroll;
} }

3
Components/9918/Implementation/9918Base.hpp
View File

@@ -280,9 +280,6 @@ class Base {
if(is_sega_vdp(personality_) && master_system_.mode4_enable) { if(is_sega_vdp(personality_) && master_system_.mode4_enable) {
screen_mode_ = ScreenMode::SMSMode4; screen_mode_ = ScreenMode::SMSMode4;
mode_timing_.pixel_lines = 192;
if(mode2_enable_ && mode1_enable_) mode_timing_.pixel_lines = 224;
if(mode2_enable_ && mode3_enable_) mode_timing_.pixel_lines = 240;
mode_timing_.maximum_visible_sprites = 8; mode_timing_.maximum_visible_sprites = 8;
return; return;
} }