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71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
//
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// 6560.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 05/06/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "6560.hpp"
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using namespace MOS;
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MOS6560::MOS6560() :
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_crt(new Outputs::CRT::CRT(65 * 4, 4, Outputs::CRT::DisplayType::NTSC60, 1))
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{
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_crt->set_rgb_sampling_function(
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"vec3 rgb_sample(usampler2D sampler, vec2 coordinate, vec2 icoordinate)"
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"{"
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"return vec3(1.0);"
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"}");
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}
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void MOS6560::set_register(int address, uint8_t value)
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{
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switch(address)
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{
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case 0x0:
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_interlaced = !!(value&0x80);
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_first_column_location = value & 0x7f;
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break;
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case 0x1:
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_first_row_location = value;
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break;
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case 0x2:
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_number_of_columns = value & 0x7f;
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_video_matrix_start_address = (uint16_t)((_video_matrix_start_address & 0x3c00) | ((value & 0x80) << 2));
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break;
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case 0x3:
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_number_of_rows = (value >> 1)&0x3f;
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_wide_characters = !!(value&0x01);
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break;
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case 0x5:
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_character_cell_start_address = (uint16_t)((value & 0x0f) << 10);
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_video_matrix_start_address = (uint16_t)((_video_matrix_start_address & 0x0400) | ((value & 0xf0) << 5));
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break;
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case 0xf:
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// TODO: colours
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break;
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default:
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break;
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}
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printf("%02x: %02x\n", address, value);
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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);
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}
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uint16_t MOS6560::get_address()
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{
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return 0x1c;
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}
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void MOS6560::set_graphics_value(uint8_t value)
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{
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}
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