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Colour phase is now updated and varies per line.

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This commit is contained in:
Thomas Harte 2016-04-21 21:07:29 -04:00
parent 23ce032ba1
commit ae2760e034
2 changed files with 7 additions and 3 deletions
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7
Machines/Electron/Electron.cpp
View File

@ -46,7 +46,8 @@ Machine::Machine() :
_audioOutputPosition(0),
_current_pixel_line(-1),
_use_fast_tape_hack(false),
_crt(nullptr)
_crt(nullptr),
_phase(0)
{
memset(_key_states, 0, sizeof(_key_states));
memset(_palette, 0xf, sizeof(_palette));
@ -421,6 +422,8 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
_frameCycles += cycles;
if(!(_frameCycles&127)) _phase += 64;
// deal with frame wraparound by updating the two dependent subsystems
// as though the exact end of frame had been hit, then reset those
// and allow the frame cycle counter to assume its real value
@ -779,7 +782,7 @@ inline void Machine::update_display()
if(this_cycle < 24)
{
if(final_cycle < 24) return;
_crt->output_colour_burst((24-9) * crt_cycles_multiplier, 0, 12);
_crt->output_colour_burst((24-9) * crt_cycles_multiplier, _phase, 12);
_displayOutputPosition += 24-9;
this_cycle = 24;
// TODO: phase shouldn't be zero on every line

3
Machines/Electron/Electron.hpp
View File

@ -190,9 +190,10 @@ class Machine: public CPU6502::Processor<Machine>, Tape::Delegate {
uint16_t _screenModeBaseAddress;
uint16_t _startScreenAddress;
// Counters related to simultaneous subsystems;
// Counters related to simultaneous subsystems
unsigned int _frameCycles, _displayOutputPosition;
unsigned int _audioOutputPosition, _audioOutputPositionError;
uint8_t _phase;
struct {
uint16_t forty1bpp[256];