mirror of
https://github.com/lefticus/6502-cpp.git
synced 2025-04-09 00:37:08 +00:00
Reorganize file structure
This commit is contained in:
Jason Turner
parent
74b2f129bf
commit
e3ebc954fa
@ -11,12 +11,32 @@ constexpr uint16_t SPRITE_EXPAND_VERTICAL = VIDEO_REGISTERS + 23;
|
||||
constexpr uint16_t SPRITE_POSITION_REGISTERS = VIDEO_REGISTERS;
|
||||
constexpr uint16_t SPRITE_COLLISIONS = VIDEO_REGISTERS + 30;
|
||||
constexpr uint16_t SPRITE_MULTICOLOR = VIDEO_REGISTERS + 28;
|
||||
constexpr uint16_t SPRITE_PRIORITY = VIDEO_REGISTERS + 27;
|
||||
constexpr uint16_t VIDEO_MEMORY = 1024;
|
||||
constexpr uint8_t SPRITE_STARTING_BANK = 192;
|
||||
constexpr uint16_t BORDER_COLOR = 53280;
|
||||
constexpr uint16_t BACKGROUND_COLOR = 53281;
|
||||
constexpr uint16_t SPRITE_0_COLOR = VIDEO_REGISTERS + 39;
|
||||
constexpr uint16_t SPRITE_1_COLOR = SPRITE_0_COLOR + 1;
|
||||
constexpr uint16_t SPRITE_2_COLOR = SPRITE_1_COLOR + 1;
|
||||
constexpr uint16_t SPRITE_3_COLOR = SPRITE_2_COLOR + 1;
|
||||
constexpr uint16_t SPRITE_4_COLOR = SPRITE_3_COLOR + 1;
|
||||
constexpr uint16_t SPRITE_5_COLOR = SPRITE_4_COLOR + 1;
|
||||
constexpr uint16_t SPRITE_6_COLOR = SPRITE_5_COLOR + 1;
|
||||
constexpr uint16_t SPRITE_7_COLOR = SPRITE_6_COLOR + 1;
|
||||
|
||||
|
||||
|
||||
namespace {
|
||||
|
||||
struct Color
|
||||
{
|
||||
uint8_t num;
|
||||
uint8_t r;
|
||||
uint8_t g;
|
||||
uint8_t b;
|
||||
};
|
||||
|
||||
volatile uint8_t &memory(const uint16_t loc)
|
||||
{
|
||||
return *reinterpret_cast<uint8_t *>(loc);
|
||||
@ -71,14 +91,15 @@ template<typename ... D>
|
||||
}
|
||||
|
||||
void enable_sprite(const uint8_t sprite_number, const uint8_t memory_loc,
|
||||
const bool multicolor,
|
||||
const bool multicolor, const bool low_priority,
|
||||
const bool double_width, const bool double_height)
|
||||
{
|
||||
set_bit(SPRITE_ENABLE_BITS, sprite_number, true);
|
||||
memory(SPRITE_DATA_POINTERS + sprite_number) = SPRITE_STARTING_BANK + memory_loc;
|
||||
set_bit(SPRITE_ENABLE_BITS, sprite_number, true);
|
||||
set_bit(SPRITE_EXPAND_HORIZONTAL, sprite_number, double_width);
|
||||
set_bit(SPRITE_EXPAND_VERTICAL, sprite_number, double_height);
|
||||
set_bit(SPRITE_MULTICOLOR, sprite_number, multicolor);
|
||||
set_bit(SPRITE_PRIORITY, sprite_number, low_priority);
|
||||
}
|
||||
|
||||
void display(uint8_t x, uint8_t y, uint8_t val)
|
||||
@ -102,6 +123,11 @@ auto joystick(const uint8_t port) {
|
||||
bool left;
|
||||
bool right;
|
||||
bool fire;
|
||||
|
||||
auto direction_vector() const
|
||||
{
|
||||
return std::make_pair(left?-1:(right?1:0), up?-1:(down?1:0));
|
||||
}
|
||||
};
|
||||
|
||||
if (port == 2) {
|
||||
@ -122,10 +148,51 @@ volatile uint8_t &sprite_y(const uint8_t sprite_num)
|
||||
return memory(SPRITE_POSITION_REGISTERS + sprite_num * 2 + 1);
|
||||
};
|
||||
|
||||
template<typename T>
|
||||
auto square(T t) {
|
||||
return t * t;
|
||||
}
|
||||
|
||||
template<uint8_t r, uint8_t g, uint8_t b>
|
||||
auto color_distance(const Color &lhs, const Color &rhs)
|
||||
{
|
||||
return (square(lhs.r - r) + square(lhs.g - g) + square(lhs.b - b))
|
||||
< (square(rhs.r - r) + square(rhs.g - g) + square(rhs.b - b));
|
||||
}
|
||||
|
||||
|
||||
template<uint8_t r, uint8_t g, uint8_t b, typename Colors>
|
||||
auto nearest_color(const Colors &colors)
|
||||
{
|
||||
return *std::min_element(std::begin(colors), std::end(colors), color_distance<r,g,b>);
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
// http://www.pepto.de/projects/colorvic/
|
||||
constexpr std::array<Color, 16> colors {{
|
||||
Color{0, 0x00, 0x00, 0x00},
|
||||
Color{1, 0xFF, 0xFF, 0xFF},
|
||||
Color{2, 0x88, 0x39, 0x32},
|
||||
Color{3, 0x67, 0xB6, 0xBD},
|
||||
Color{4, 0x8B, 0x3F, 0x96},
|
||||
Color{5, 0x55, 0xA0, 0x49},
|
||||
Color{6, 0x40, 0x31, 0x8D},
|
||||
Color{7, 0xBF, 0xCE, 0x72},
|
||||
Color{8, 0x8B, 0x54, 0x29},
|
||||
Color{9, 0x57, 0x42, 0x00},
|
||||
Color{10, 0xB8, 0x69, 0x62},
|
||||
Color{11, 0x50, 0x50, 0x50},
|
||||
Color{12, 0x78, 0x78, 0x78},
|
||||
Color{13, 0x94, 0xE0, 0x89},
|
||||
Color{14, 0x78, 0x69, 0xC4},
|
||||
Color{15, 0x9F, 0x9F, 0x9F}
|
||||
}};
|
||||
|
||||
|
||||
make_sprite(0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
@ -150,7 +217,9 @@ int main()
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
|
||||
);
|
||||
|
||||
enable_sprite(0, 0, false, false, false);
|
||||
|
||||
|
||||
enable_sprite(0, 0, false, true, false, false);
|
||||
|
||||
make_sprite(1,
|
||||
0,0,0,0,0,2,2,0,0,0,0,0,
|
||||
@ -176,10 +245,11 @@ int main()
|
||||
0,0,0,0,0,3,3,0,0,0,0,0
|
||||
);
|
||||
|
||||
enable_sprite(1, 1, true, false, true);
|
||||
enable_sprite(2, 1, true, false, true);
|
||||
|
||||
|
||||
enable_sprite(1, 1, true, false, false, true);
|
||||
enable_sprite(2, 1, true, false, false, true);
|
||||
|
||||
const auto sprite_collisions = []() {
|
||||
const auto collisions = memory(SPRITE_COLLISIONS);
|
||||
memory(SPRITE_COLLISIONS) = 0;
|
||||
@ -198,7 +268,7 @@ int main()
|
||||
test_bit(collisions, 4),test_bit(collisions, 5),test_bit(collisions, 6),test_bit(collisions, 7)};
|
||||
};
|
||||
|
||||
std::pair<int8_t, int8_t> ball_vec{1,1};
|
||||
std::pair<int8_t, int8_t> ball_velocity{1,1};
|
||||
|
||||
const auto reset_ball = [&]{
|
||||
sprite_x(0) = 255/2;
|
||||
@ -206,28 +276,27 @@ int main()
|
||||
};
|
||||
|
||||
reset_ball();
|
||||
|
||||
sprite_x(1) = 15;
|
||||
sprite_y(1) = 255/2;
|
||||
|
||||
sprite_x(2) = 255;
|
||||
sprite_y(2) = 255/2;
|
||||
|
||||
memory(53280) = 12;
|
||||
memory(53281) = 0;
|
||||
|
||||
|
||||
memory(BORDER_COLOR) = nearest_color<128,128,128>(colors).num;
|
||||
memory(BACKGROUND_COLOR) = nearest_color<0,0,0>(colors).num;
|
||||
memory(SPRITE_1_COLOR) = nearest_color<255,0,0>(colors).num;
|
||||
memory(SPRITE_2_COLOR) = nearest_color<0,255,0>(colors).num;
|
||||
|
||||
|
||||
struct Player
|
||||
{
|
||||
Player(const uint8_t num, const uint8_t startx, const uint8_t starty)
|
||||
: player_num(num),
|
||||
x(sprite_x(player_num)),
|
||||
y(sprite_y(player_num))
|
||||
{
|
||||
x = startx;
|
||||
y = starty;
|
||||
}
|
||||
|
||||
void update_position()
|
||||
{
|
||||
if (const auto joy = joystick(player_num);
|
||||
joy.up)
|
||||
{
|
||||
sprite_y(player_num) += 3;
|
||||
} else if (joy.down) {
|
||||
sprite_y(player_num) -= 3;
|
||||
}
|
||||
y += joystick(player_num).direction_vector().second * 3;
|
||||
};
|
||||
|
||||
void scored() {
|
||||
@ -235,52 +304,70 @@ int main()
|
||||
}
|
||||
|
||||
const uint8_t player_num;
|
||||
volatile uint8_t &x;
|
||||
volatile uint8_t &y;
|
||||
uint8_t score = '0';
|
||||
};
|
||||
|
||||
Player p1{1};
|
||||
Player p2{2};
|
||||
Player p1(1, 15, 255/2);
|
||||
Player p2(2, 255, 255/2);
|
||||
|
||||
const auto raster_off_screen = [](){
|
||||
return memory(53266) == 250 && !test_bit(memory(53265),7);
|
||||
};
|
||||
|
||||
while (true) {
|
||||
if (raster_off_screen())
|
||||
struct Frame
|
||||
{
|
||||
Frame(Player &p1, Player &p2)
|
||||
: player1(p1), player2(p2)
|
||||
{
|
||||
if (const auto collisions = sprite_collisions();
|
||||
collisions.sprite0 && (collisions.sprite1 || collisions.sprite2))
|
||||
{
|
||||
std::get<0>(ball_vec) *= -1; //invert ball x velocity
|
||||
// "bounce" ball out of collision area
|
||||
sprite_x(0) += std::get<0>(ball_vec);
|
||||
}
|
||||
|
||||
// Update paddle positions
|
||||
p1.update_position();
|
||||
p2.update_position();
|
||||
|
||||
// ball hit the top or bottom wall
|
||||
if (const auto ball_y = sprite_y(0) += std::get<1>(ball_vec);
|
||||
ball_y == 45 || ball_y == 235)
|
||||
{
|
||||
std::get<1>(ball_vec) *= -1;
|
||||
}
|
||||
|
||||
if (const auto ball_x = sprite_x(0) += std::get<0>(ball_vec);
|
||||
ball_x == 1) {
|
||||
// ball hit left wall, player 2 scored
|
||||
p2.scored();
|
||||
reset_ball();
|
||||
} else if (ball_x == 255) {
|
||||
// ball hit right wall, player 1 scored
|
||||
p1.scored();
|
||||
reset_ball();
|
||||
}
|
||||
|
||||
display(10, 12, p1.score);
|
||||
display(30, 12, p2.score);
|
||||
while (!(memory(53266) == 250 && !test_bit(memory(53265),7))) {}
|
||||
}
|
||||
}
|
||||
|
||||
~Frame() {
|
||||
display(10, 12, player1.score);
|
||||
display(20, 12, player2.score);
|
||||
}
|
||||
|
||||
Player &player1;
|
||||
Player &player2;
|
||||
};
|
||||
|
||||
|
||||
while (true) {
|
||||
Frame rt(p1, p2);
|
||||
|
||||
if (auto [s0, s1, s2, s3, s4, s5, s6, s7] = sprite_collisions();
|
||||
s0 && (s1 || s2))
|
||||
{
|
||||
std::get<0>(ball_velocity) *= -1; //invert ball x velocity
|
||||
// "bounce" ball out of collision area
|
||||
sprite_x(0) += std::get<0>(ball_velocity);
|
||||
}
|
||||
|
||||
// Update paddle positions
|
||||
p1.update_position();
|
||||
p2.update_position();
|
||||
|
||||
|
||||
|
||||
// ball hit the top or bottom wall
|
||||
if (const auto ball_y = sprite_y(0) += std::get<1>(ball_velocity);
|
||||
ball_y == 45 || ball_y == 235)
|
||||
{
|
||||
std::get<1>(ball_velocity) *= -1;
|
||||
}
|
||||
|
||||
const auto score = [reset_ball](auto &player){
|
||||
player.scored();
|
||||
reset_ball();
|
||||
};
|
||||
|
||||
if (const auto ball_x = sprite_x(0) += std::get<0>(ball_velocity);
|
||||
ball_x == 1) {
|
||||
// ball hit left wall, player 2 scored
|
||||
score(p2);
|
||||
} else if (ball_x == 255) {
|
||||
// ball hit right wall, player 1 scored
|
||||
score(p1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
7
make_file.sh
Executable file
7
make_file.sh
Executable file
@ -0,0 +1,7 @@
|
||||
#! /bin/bash
|
||||
|
||||
~/llvm-build/bin/clang++ -std=c++1z -c -O3 -o- -Wall -Wextra -m32 -march=i386 -ggdb -S $1 > $1.x86.asm
|
||||
cat $1.x86.asm | ~/x86-to-6502-build/x86-to-6502 > $1.6502.asm
|
||||
cat $1.6502.asm | sed -e "/^\t\..*$/d" > $1.asm
|
||||
~/Downloads/TMPx_v1.1.0-STYLE/linux-x86_64/tmpx $1.asm
|
||||
|
||||
92
src/main.cpp
92
src/main.cpp
@ -292,7 +292,10 @@ struct mos6502 : ASMLine
|
||||
return text; // + ':';
|
||||
case ASMLine::Type::Directive:
|
||||
case ASMLine::Type::Instruction:
|
||||
return '\t' + text + ' ' + op.value + "; " + comment;
|
||||
{
|
||||
const std::string line = '\t' + text + ' ' + op.value;
|
||||
return line + std::string(static_cast<size_t>(std::max(15 - static_cast<int>(line.size()), 1)), ' ') + "; " + comment;
|
||||
}
|
||||
};
|
||||
throw std::runtime_error("Unable to render: " + text);
|
||||
}
|
||||
@ -506,6 +509,10 @@ void translate_instruction(std::vector<mos6502> &instructions, const i386::OpCod
|
||||
instructions.emplace_back(mos6502::OpCode::lda, get_register(o1.reg_num));
|
||||
instructions.emplace_back(mos6502::OpCode::ORA, get_register(o2.reg_num));
|
||||
instructions.emplace_back(mos6502::OpCode::sta, get_register(o2.reg_num));
|
||||
} else if (o1.type == Operand::Type::literal && o2.type == Operand::Type::reg) {
|
||||
instructions.emplace_back(mos6502::OpCode::lda, Operand(o1.type, fixup_8bit_literal(o1.value)));
|
||||
instructions.emplace_back(mos6502::OpCode::ORA, get_register(o2.reg_num));
|
||||
instructions.emplace_back(mos6502::OpCode::sta, get_register(o2.reg_num));
|
||||
} else {
|
||||
throw std::runtime_error("Cannot translate orb instruction");
|
||||
}
|
||||
@ -732,14 +739,24 @@ void to_mos6502(const i386 &i, std::vector<mos6502> &instructions)
|
||||
instructions.emplace_back(i.type, i.text);
|
||||
return;
|
||||
case ASMLine::Type::Directive:
|
||||
// instructions.emplace_back(i.type, i.text);
|
||||
instructions.emplace_back(i.type, i.text);
|
||||
return;
|
||||
case ASMLine::Type::Instruction:
|
||||
// instructions.emplace_back(ASMLine::Type::Directive, "; " + i.line_text);
|
||||
|
||||
const auto head = instructions.size();
|
||||
translate_instruction(instructions, i.opcode, i.operand1, i.operand2);
|
||||
for_each(std::next(instructions.begin(), head), instructions.end(), [ text = i.line_text ](auto &ins){ ins.comment = text; });
|
||||
|
||||
auto text = i.line_text;
|
||||
if (text[0] == '\t') {
|
||||
text.erase(0, 1);
|
||||
}
|
||||
for_each(std::next(instructions.begin(), head), instructions.end(),
|
||||
[ text ](auto &ins){
|
||||
|
||||
ins.comment = text;
|
||||
}
|
||||
);
|
||||
return;
|
||||
}
|
||||
} catch (const std::exception &e) {
|
||||
@ -753,20 +770,38 @@ bool optimize(std::vector<mos6502> &instructions)
|
||||
return false;
|
||||
}
|
||||
|
||||
const auto next_instruction = [&instructions](auto i) {
|
||||
do {
|
||||
++i;
|
||||
} while (i < instructions.size() && instructions[i].type == ASMLine::Type::Directive);
|
||||
return i;
|
||||
};
|
||||
|
||||
for (size_t op = 0; op < instructions.size() - 1; ++op)
|
||||
{
|
||||
if (instructions[op].opcode == mos6502::OpCode::tya
|
||||
&& instructions[op+1].opcode == mos6502::OpCode::tay)
|
||||
// look for a transfer of Y -> A immediately followed by A -> Y
|
||||
if (instructions[op].opcode == mos6502::OpCode::tya)
|
||||
{
|
||||
instructions.erase(std::next(std::begin(instructions), op + 1), std::next(std::begin(instructions), op+2));
|
||||
return true;
|
||||
next_instruction(op);
|
||||
if (instructions[op].opcode == mos6502::OpCode::tay) {
|
||||
instructions.erase(std::next(std::begin(instructions), op), std::next(std::begin(instructions), op+1));
|
||||
return true;
|
||||
}
|
||||
}
|
||||
if (instructions[op].opcode == mos6502::OpCode::sta
|
||||
&& instructions[op+1].opcode == mos6502::OpCode::lda
|
||||
&& instructions[op].op == instructions[op+1].op)
|
||||
}
|
||||
|
||||
for (size_t op = 0; op < instructions.size() - 1; ++op)
|
||||
{
|
||||
// look for a store A -> loc immediately followed by loc -> A
|
||||
if (instructions[op].opcode == mos6502::OpCode::sta)
|
||||
{
|
||||
instructions.erase(std::next(std::begin(instructions), op + 1), std::next(std::begin(instructions), op+2));
|
||||
return true;
|
||||
const auto next = next_instruction(op);
|
||||
if (instructions[next].opcode == mos6502::OpCode::lda
|
||||
&& instructions[next].op == instructions[op].op)
|
||||
{
|
||||
instructions.erase(std::next(std::begin(instructions), next), std::next(std::begin(instructions), next+1));
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -777,7 +812,9 @@ bool optimize(std::vector<mos6502> &instructions)
|
||||
{
|
||||
const auto operand = instructions[op].op;
|
||||
auto op2 = op+1;
|
||||
while (op2 < instructions.size() && instructions[op2].opcode == mos6502::OpCode::sta) {
|
||||
// look for multiple stores of the same value
|
||||
while (op2 < instructions.size() && (instructions[op2].opcode == mos6502::OpCode::sta
|
||||
|| instructions[op2].type == ASMLine::Type::Directive)) {
|
||||
++op2;
|
||||
}
|
||||
if (instructions[op2].opcode == mos6502::OpCode::lda
|
||||
@ -810,12 +847,14 @@ bool fix_long_branches(std::vector<mos6502> &instructions, int &branch_patch_cou
|
||||
{
|
||||
++branch_patch_count;
|
||||
const auto going_to = instructions[op].op.value;
|
||||
const auto new_pos = "branch_patch_" + std::to_string(branch_patch_count);
|
||||
const auto new_pos = "patch_" + std::to_string(branch_patch_count);
|
||||
// uh-oh too long of a branch, have to convert this to a jump...
|
||||
if (instructions[op].opcode == mos6502::OpCode::bne) {
|
||||
const auto comment = instructions[op].comment;
|
||||
instructions[op] = mos6502(mos6502::OpCode::beq, Operand(Operand::Type::literal, new_pos));
|
||||
instructions.insert(std::next(std::begin(instructions), op + 1), mos6502(mos6502::OpCode::jmp, Operand(Operand::Type::literal, going_to)));
|
||||
instructions.insert(std::next(std::begin(instructions), op + 2), mos6502(ASMLine::Type::Label, new_pos));
|
||||
instructions[op].comment = instructions[op+1].comment = instructions[op+2].comment = comment;
|
||||
return true;
|
||||
} else {
|
||||
throw std::runtime_error("Don't know how to reorg this branch");
|
||||
@ -938,7 +977,6 @@ int main()
|
||||
instructions.erase(
|
||||
std::remove_if(std::begin(instructions), std::end(instructions),
|
||||
[&used_labels](const auto &i){
|
||||
// if (i.type == ASMLine::Type::Directive) return true;
|
||||
if (i.type == ASMLine::Type::Label) {
|
||||
if (used_labels.count(i.text) == 0) {
|
||||
// remove all unused labels that aren't 'main'
|
||||
@ -952,18 +990,6 @@ int main()
|
||||
);
|
||||
|
||||
|
||||
// remove everything up to the first label
|
||||
// this will probably leave some dead code around at some point
|
||||
// but it's a start
|
||||
/*
|
||||
instructions.erase(
|
||||
std::begin(instructions),
|
||||
std::find_if(std::begin(instructions),
|
||||
std::end(instructions),
|
||||
[](const auto &i){ return i.type == ASMLine::Type::Label; }
|
||||
)
|
||||
);
|
||||
*/
|
||||
|
||||
const auto new_labels =
|
||||
[&used_labels](){
|
||||
@ -972,24 +998,17 @@ int main()
|
||||
auto newl = l;
|
||||
std::transform(newl.begin(), newl.end(), newl.begin(), [](const auto c) { return std::tolower(c); });
|
||||
newl.erase(std::remove_if(newl.begin(), newl.end(), [](const auto c){ return !std::isalnum(c); }), std::end(newl));
|
||||
// std::cout << "Old label: '" << l << "' new label: '" << newl << "'\n";
|
||||
result.emplace(std::make_pair(l, newl));
|
||||
}
|
||||
return result;
|
||||
}();
|
||||
|
||||
|
||||
// for (const auto &i : instructions)
|
||||
// {
|
||||
// std::cout << "'" << i.text << "' '" << i.operand1.value << "' '" << i.operand2.value << "'\n";
|
||||
// }
|
||||
|
||||
|
||||
for (auto &i : instructions)
|
||||
{
|
||||
if (i.type == ASMLine::Type::Label)
|
||||
{
|
||||
// std::cout << "Updating label " << i.text << '\n';;
|
||||
i.text = new_labels.at(i.text);
|
||||
}
|
||||
|
||||
@ -1004,10 +1023,6 @@ int main()
|
||||
}
|
||||
}
|
||||
|
||||
// for (const auto &i : instructions)
|
||||
// {
|
||||
// std::cout << "'" << i.text << "' '" << i.operand1.value << "' '" << i.operand2.value << "'\n";
|
||||
// }
|
||||
|
||||
std::vector<mos6502> new_instructions;
|
||||
|
||||
@ -1037,5 +1052,4 @@ int main()
|
||||
{
|
||||
std::cout << i.to_string() << '\n';
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
339
src/pong.cpp
339
src/pong.cpp
@ -1,339 +0,0 @@
|
||||
#include <cstdint>
|
||||
#include <array>
|
||||
#include <utility>
|
||||
#include <algorithm>
|
||||
|
||||
constexpr uint16_t SPRITE_DATA_POINTERS = 2040;
|
||||
constexpr uint16_t VIDEO_REGISTERS = 53248;
|
||||
constexpr uint16_t SPRITE_ENABLE_BITS = VIDEO_REGISTERS + 21;
|
||||
constexpr uint16_t SPRITE_EXPAND_HORIZONTAL = VIDEO_REGISTERS + 29;
|
||||
constexpr uint16_t SPRITE_EXPAND_VERTICAL = VIDEO_REGISTERS + 23;
|
||||
constexpr uint16_t SPRITE_POSITION_REGISTERS = VIDEO_REGISTERS;
|
||||
constexpr uint16_t SPRITE_COLLISIONS = VIDEO_REGISTERS + 30;
|
||||
constexpr uint16_t SPRITE_MULTICOLOR = VIDEO_REGISTERS + 28;
|
||||
constexpr uint16_t VIDEO_MEMORY = 1024;
|
||||
constexpr auto starting_bank = 192;
|
||||
|
||||
|
||||
namespace {
|
||||
|
||||
volatile uint8_t &memory(const uint16_t loc)
|
||||
{
|
||||
return *reinterpret_cast<uint8_t *>(loc);
|
||||
}
|
||||
|
||||
struct Color
|
||||
{
|
||||
enum class Name : uint8_t {
|
||||
Black = 0,
|
||||
White = 1,
|
||||
Red = 2,
|
||||
Cyan = 3,
|
||||
Purple = 4,
|
||||
Green = 5,
|
||||
Blue = 6,
|
||||
Yellow = 7,
|
||||
Orange = 8,
|
||||
Brown = 9,
|
||||
LightRed = 10,
|
||||
DarkGrey = 11,
|
||||
Grey = 12,
|
||||
LightGreen = 13,
|
||||
LightBlue = 14,
|
||||
LightGrey = 15
|
||||
};
|
||||
|
||||
constexpr Color(const Name t_name, const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
|
||||
: name(t_name), r(t_r), g(t_g), b(t_b)
|
||||
{
|
||||
}
|
||||
|
||||
Name name;
|
||||
uint8_t r;
|
||||
uint8_t g;
|
||||
uint8_t b;
|
||||
};
|
||||
|
||||
template<typename T>
|
||||
constexpr auto square(T t)
|
||||
{
|
||||
return t*t;
|
||||
}
|
||||
|
||||
constexpr auto distance(const Color &lhs, const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
|
||||
{
|
||||
// http://stackoverflow.com/questions/4754506/color-similarity-distance-in-rgba-color-space
|
||||
return square(lhs.r - t_r) + square(lhs.g - t_g) + square(lhs.b - t_b);
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
constexpr auto distance_table(T colors, const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
|
||||
{
|
||||
std::array<int, colors.size()> distances{};
|
||||
auto pos = std::begin(distances);
|
||||
|
||||
|
||||
for (const auto &color : colors) {
|
||||
*pos = distance(color, t_r, t_g, t_b);
|
||||
++pos;
|
||||
}
|
||||
|
||||
return distances;
|
||||
}
|
||||
|
||||
template<typename T>
|
||||
constexpr Color nearest_color(T colors,
|
||||
const uint8_t t_r, const uint8_t t_g, const uint8_t t_b)
|
||||
{
|
||||
const auto ds = distance_table(colors, t_r, t_g, t_b);
|
||||
const auto distance = std::min_element(std::begin(ds), std::end(ds)) - std::begin(ds);
|
||||
return colors[distance];
|
||||
|
||||
/*
|
||||
return *std::min_element(std::begin(colors), std::end(colors),
|
||||
[&](const auto &lhs, const auto &rhs)
|
||||
{
|
||||
return distance(lhs, t_r, t_g, t_b) < distance(rhs, t_r, t_g, t_b);
|
||||
});
|
||||
*/
|
||||
}
|
||||
|
||||
void clear_bit(const uint16_t loc, const uint8_t bitnum)
|
||||
{
|
||||
memory(loc) &= (0xFF ^ (1 << bitnum));
|
||||
}
|
||||
|
||||
void set_bit(const uint16_t loc, const uint8_t bitnum)
|
||||
{
|
||||
memory(loc) |= (1 << bitnum);
|
||||
}
|
||||
|
||||
void write_multi_color_pixel(uint16_t)
|
||||
{
|
||||
}
|
||||
|
||||
template<typename D1, typename D2, typename D3, typename D4, typename ... D >
|
||||
void write_multi_color_pixel(uint16_t loc, D1 d1, D2 d2, D3 d3, D4 d4, D ... d)
|
||||
{
|
||||
memory(loc) = (d1 << 6) | (d2 << 4) | (d3 << 2) | d4;
|
||||
write_multi_color_pixel(loc + 1, d...);
|
||||
}
|
||||
|
||||
constexpr bool test_bit(const uint8_t data, const uint8_t bit)
|
||||
{
|
||||
return (data & (1 << bit)) != 0;
|
||||
};
|
||||
|
||||
|
||||
|
||||
template<typename ... D>
|
||||
void make_sprite(uint8_t memory_loc, D ... d)
|
||||
{
|
||||
write_multi_color_pixel((starting_bank + memory_loc) * 64, d...);
|
||||
}
|
||||
|
||||
|
||||
void enable_sprite(const uint8_t sprite_number, const uint8_t memory_loc,
|
||||
const bool multicolor,
|
||||
const bool double_width, const bool double_height)
|
||||
{
|
||||
set_bit(SPRITE_ENABLE_BITS, sprite_number);
|
||||
memory(SPRITE_DATA_POINTERS + sprite_number) = starting_bank + memory_loc;
|
||||
if (double_width) {
|
||||
set_bit(SPRITE_EXPAND_HORIZONTAL, sprite_number);
|
||||
} else {
|
||||
clear_bit(SPRITE_EXPAND_HORIZONTAL, sprite_number);
|
||||
}
|
||||
|
||||
if (double_height) {
|
||||
set_bit(SPRITE_EXPAND_VERTICAL, sprite_number);
|
||||
} else {
|
||||
clear_bit(SPRITE_EXPAND_VERTICAL, sprite_number);
|
||||
}
|
||||
|
||||
if (multicolor) {
|
||||
set_bit(SPRITE_MULTICOLOR, sprite_number);
|
||||
} else {
|
||||
clear_bit(SPRITE_MULTICOLOR, sprite_number);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void display_int(uint8_t x, uint8_t y, uint8_t val)
|
||||
{
|
||||
memory(VIDEO_MEMORY + y * 40 + x) = val;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
int main()
|
||||
{
|
||||
constexpr std::array<Color, 16> colors {Color{Color::Name::Black, 0,0,0},
|
||||
Color{Color::Name::White, 255,255,255},
|
||||
Color{Color::Name::Red, 104, 55, 43},
|
||||
Color{Color::Name::Cyan, 112, 164, 178},
|
||||
Color{Color::Name::Purple, 111, 61, 134},
|
||||
Color{Color::Name::Green, 88, 141, 67},
|
||||
Color{Color::Name::Blue, 53, 40, 121},
|
||||
Color{Color::Name::Yellow, 184, 199, 111},
|
||||
Color{Color::Name::Orange, 111, 79, 37},
|
||||
Color{Color::Name::Brown, 67, 57, 0},
|
||||
Color{Color::Name::LightRed, 154, 103, 89},
|
||||
Color{Color::Name::DarkGrey, 68, 68, 68},
|
||||
Color{Color::Name::Grey, 108, 108, 108},
|
||||
Color{Color::Name::LightGreen, 154, 210, 132},
|
||||
Color{Color::Name::LightBlue, 108, 94, 181},
|
||||
Color{Color::Name::LightGrey, 149, 149, 149}};
|
||||
|
||||
//constexpr auto nearest_black = nearest_color(colors, 0, 0, 0);
|
||||
//constexpr auto nearest_red = nearest_color(colors, 255, 255, 0);
|
||||
|
||||
|
||||
make_sprite(0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,2,2,2,2,0,0,0,0,
|
||||
0,0,0,2,2,2,2,2,2,0,0,0,
|
||||
0,0,2,2,2,1,1,2,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,1,1,1,1,2,2,0,0,
|
||||
0,0,2,2,2,1,1,2,2,2,0,0,
|
||||
0,0,0,2,2,2,2,2,2,0,0,0,
|
||||
0,0,0,2,2,2,2,2,2,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0,
|
||||
0,0,0,0,0,0,0,0,0,0,0,0
|
||||
);
|
||||
|
||||
enable_sprite(0, 0, true, false, false);
|
||||
|
||||
// start timer
|
||||
memory(56590) = 1;
|
||||
|
||||
|
||||
const auto joy = [](const uint8_t d){
|
||||
struct State{
|
||||
State(const uint8_t portdata)
|
||||
: up(!test_bit(portdata,0)),
|
||||
down(!test_bit(portdata,1)),
|
||||
left(!test_bit(portdata,2)),
|
||||
right(!test_bit(portdata,3)),
|
||||
fire(!test_bit(portdata,4))
|
||||
{
|
||||
}
|
||||
|
||||
auto direction_vector() const
|
||||
{
|
||||
const auto dir = [](const bool neg, const bool pos) {
|
||||
if (neg) return -1;
|
||||
if (pos) return 1;
|
||||
return 0;
|
||||
};
|
||||
|
||||
return std::make_pair(dir(left, right), dir(up, down));
|
||||
}
|
||||
|
||||
bool up;
|
||||
bool down;
|
||||
bool left;
|
||||
bool right;
|
||||
bool fire;
|
||||
};
|
||||
return State(d);
|
||||
};
|
||||
|
||||
const auto joy_port2 = [joy](){
|
||||
return joy(memory(56320));
|
||||
};
|
||||
|
||||
const auto joy_port1 = [joy](){
|
||||
return joy(memory(56321));
|
||||
};
|
||||
|
||||
|
||||
const auto sprite_x = [](const uint8_t sprite_num) -> decltype(auto)
|
||||
{
|
||||
return (memory(SPRITE_POSITION_REGISTERS + sprite_num * 2));
|
||||
};
|
||||
|
||||
const auto sprite_y = [](const uint8_t sprite_num) -> decltype(auto)
|
||||
{
|
||||
return (memory(SPRITE_POSITION_REGISTERS + sprite_num * 2 + 1));
|
||||
};
|
||||
|
||||
const auto sprite_collisions = []() {
|
||||
const auto collisions = memory(SPRITE_COLLISIONS);
|
||||
memory(SPRITE_COLLISIONS) = 0;
|
||||
struct Col_Data {
|
||||
bool sprite0;
|
||||
bool sprite1;
|
||||
bool sprite2;
|
||||
bool sprite3;
|
||||
bool sprite4;
|
||||
bool sprite5;
|
||||
bool sprite6;
|
||||
bool sprite7;
|
||||
};
|
||||
|
||||
return Col_Data{test_bit(collisions, 0),test_bit(collisions, 1),test_bit(collisions, 2),test_bit(collisions, 3),
|
||||
test_bit(collisions, 4),test_bit(collisions, 5),test_bit(collisions, 6),test_bit(collisions, 7)};
|
||||
};
|
||||
|
||||
|
||||
std::pair<int8_t, int8_t> ball_vec{1,1};
|
||||
uint8_t player1 = 0;
|
||||
uint8_t player2 = 0;
|
||||
|
||||
sprite_x(0) = 50;
|
||||
sprite_y(0) = 50;
|
||||
|
||||
while (true) {
|
||||
|
||||
if (memory(56325) == 0) {
|
||||
// Move ball
|
||||
const auto ball_x = sprite_x(0) += std::get<0>(ball_vec);
|
||||
const auto ball_y = sprite_y(0) += std::get<1>(ball_vec);
|
||||
|
||||
// Update paddle positions
|
||||
const auto vec = joy_port2().direction_vector();
|
||||
sprite_y(1) += std::get<1>(vec);
|
||||
const auto vec2 = joy_port1().direction_vector();
|
||||
sprite_y(2) += std::get<1>(vec2);
|
||||
|
||||
|
||||
if (const auto col_data = sprite_collisions();
|
||||
(col_data.sprite1 || col_data.sprite2) && col_data.sprite0) {
|
||||
// ball hit a paddle
|
||||
std::get<0>(ball_vec) *= -1;
|
||||
}
|
||||
|
||||
// ball hit the top or bottom wall
|
||||
if (ball_y == 30 || ball_y == 240) {
|
||||
std::get<1>(ball_vec) *= -1;
|
||||
}
|
||||
|
||||
if (ball_x == 1) {
|
||||
// ball hit left wall, player 2 scored
|
||||
++player2;
|
||||
} else if (ball_x == 254) {
|
||||
// ball hit right wall, player 1 scored
|
||||
++player1;
|
||||
}
|
||||
|
||||
display_int(10, 3, player1);
|
||||
display_int(30, 3, player2);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user