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Made some attempt at discerning fields.

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This commit is contained in:
Thomas Harte 2016-06-05 14:05:31 -04:00
parent 9566c87532
commit 3be1ce457b
2 changed files with 43 additions and 3 deletions
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41
Components/6560/6560.cpp
View File

@ -11,7 +11,7 @@
using namespace MOS;
MOS6560::MOS6560() :
_crt(new Outputs::CRT::CRT(65, 1, Outputs::CRT::DisplayType::NTSC60, 1))
_crt(new Outputs::CRT::CRT(65 * 4, 4, Outputs::CRT::DisplayType::NTSC60, 1))
{
_crt->set_rgb_sampling_function(
"vec3 rgb_sample(usampler2D sampler, vec2 coordinate, vec2 icoordinate)"
@ -22,12 +22,47 @@ MOS6560::MOS6560() :
void MOS6560::set_register(int address, uint8_t value)
{
printf("%02x -> %d\n", value, address);
switch(address)
{
case 0x0:
_interlaced = !!(value&0x80);
_first_column_location = value & 0x7f;
break;
case 0x1:
_first_row_location = value;
break;
case 0x2:
_number_of_columns = value & 0x7f;
_video_matrix_start_address = (uint16_t)((_video_matrix_start_address & 0x3c00) | ((value & 0x80) << 2));
break;
case 0x3:
_number_of_rows = (value >> 1)&0x3f;
_wide_characters = !!(value&0x01);
break;
case 0x5:
_character_cell_start_address = (uint16_t)((value & 0x0f) << 10);
_video_matrix_start_address = (uint16_t)((_video_matrix_start_address & 0x0400) | ((value & 0xf0) << 5));
break;
case 0xf:
// TODO: colours
break;
default:
break;
}
printf("%02x: %02x\n", address, value);
printf("%04x %04x [%d by %d from %d, %d]\n", _character_cell_start_address, _video_matrix_start_address, _number_of_columns, _number_of_rows, _first_column_location, _first_row_location);
}
uint16_t MOS6560::get_address()
{
return 0;
return 0x1c;
}
void MOS6560::set_graphics_value(uint8_t value)

5
Components/6560/6560.hpp
View File

@ -25,6 +25,11 @@ class MOS6560 {
private:
std::unique_ptr<Outputs::CRT::CRT> _crt;
bool _interlaced, _wide_characters;
uint8_t _first_column_location, _first_row_location;
uint8_t _number_of_columns, _number_of_rows;
uint16_t _character_cell_start_address, _video_matrix_start_address;
};
}