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Blank lines are missing (if the double negative can be forgiven) but the framebuffer is otherwise seemingly working well again.

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This commit is contained in:
Thomas Harte 2016-02-20 00:11:23 -05:00
parent a3432120f3
commit 518c134348
1 changed files with 51 additions and 7 deletions
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58
Machines/Electron/Electron.cpp
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@ -386,7 +386,8 @@ inline void Machine::reset_pixel_output()
{
display_x = 0;
display_y = 0;
_startLineAddress = _startScreenAddress;
_currentScreenAddress = _startLineAddress = _startScreenAddress;
_currentOutputLine = 0;
}
inline void Machine::output_pixels(int start_x, int number_of_pixels)
@ -416,13 +417,30 @@ inline void Machine::output_pixels(int start_x, int number_of_pixels)
number_of_pixels = ((start_x + number_of_pixels) >> 1) - (start_x >> 1);
}
#define GetNextPixels() \
if(_currentScreenAddress&32768)\
{\
_currentScreenAddress = (_screenModeBaseAddress + _currentScreenAddress)&32767;\
}\
uint8_t pixels = _ram[_currentScreenAddress];\
_currentScreenAddress = _currentScreenAddress+8
switch(_screen_mode)
{
default:
case 0: case 3: case 4: case 6:
while(number_of_pixels--)
{
_writePointer[0] = 7;
GetNextPixels();
_writePointer[0] = _palette[(pixels&0x80) >> 4];
_writePointer[1] = _palette[(pixels&0x40) >> 3];
_writePointer[2] = _palette[(pixels&0x20) >> 2];
_writePointer[3] = _palette[(pixels&0x10) >> 1];
_writePointer[4] = _palette[(pixels&0x08) >> 0];
_writePointer[5] = _palette[(pixels&0x04) << 1];
_writePointer[6] = _palette[(pixels&0x02) << 2];
_writePointer[7] = _palette[(pixels&0x01) << 3];
_writePointer += 8;
}
break;
@ -430,6 +448,13 @@ inline void Machine::output_pixels(int start_x, int number_of_pixels)
case 1: case 5:
while(number_of_pixels--)
{
GetNextPixels();
_writePointer[0] = _palette[((pixels&0x80) >> 4) | ((pixels&0x08) >> 2)];
_writePointer[1] = _palette[((pixels&0x40) >> 3) | ((pixels&0x04) >> 1)];
_writePointer[2] = _palette[((pixels&0x20) >> 2) | ((pixels&0x02) >> 0)];
_writePointer[3] = _palette[((pixels&0x10) >> 1) | ((pixels&0x01) << 1)];
_writePointer += 4;
}
break;
@ -437,11 +462,17 @@ inline void Machine::output_pixels(int start_x, int number_of_pixels)
case 2:
while(number_of_pixels--)
{
GetNextPixels();
_writePointer[0] = _palette[((pixels&0x80) >> 4) | ((pixels&0x20) >> 3) | ((pixels&0x08) >> 2) | ((pixels&0x02) >> 1)];
_writePointer[1] = _palette[((pixels&0x40) >> 3) | ((pixels&0x10) >> 2) | ((pixels&0x04) >> 1) | ((pixels&0x01) >> 0)];
_writePointer += 2;
}
break;
}
}
#undef GetNextPixels
}
inline void Machine::end_pixel_output()
@ -467,6 +498,7 @@ inline void Machine::update_pixels_to_position(int x, int y)
_crt->output_sync(9 * crt_cycles_multiplier);
_crt->output_blank((first_graphics_cycle - 9) * crt_cycles_multiplier);
end = _crt->get_field_cycle();
_currentScreenAddress = _startLineAddress;
}
continue;
}
@ -481,10 +513,10 @@ inline void Machine::update_pixels_to_position(int x, int y)
{
end_pixel_output();
if(_crt->get_field_cycle() - end != 640)
{
printf("!!!\n");
}
// if(_crt->get_field_cycle() - end != 640)
// {
// printf("!!!\n");
// }
}
continue;
}
@ -495,6 +527,14 @@ inline void Machine::update_pixels_to_position(int x, int y)
_crt->output_blank((128 - 80 - first_graphics_cycle) * crt_cycles_multiplier);
display_x = 0;
display_y++;
_startLineAddress++;
_currentOutputLine++;
if(_currentOutputLine == 8)
{
_currentOutputLine = 0;
_startLineAddress += ((_screen_mode > 3) ? 40 : 80) * 8 - 8;
}
}
}
@ -572,7 +612,11 @@ inline void Machine::update_display()
if(_displayOutputPosition < end_of_top && _fieldCycles >= end_of_top)
{
// printf("[1] %d / %d\n", _crt->get_field_cycle() >> 10, (_crt->get_field_cycle() >> 3)&127);
if(!_is_odd_field) _crt->output_blank(64 * crt_cycles_multiplier);
if(!_is_odd_field)
{
_crt->output_sync(9 * crt_cycles_multiplier);
_crt->output_blank(55 * crt_cycles_multiplier);
}
_crt->output_sync(320 * crt_cycles_multiplier);
if(_is_odd_field) _crt->output_blank(64 * crt_cycles_multiplier);