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https://github.com/lefticus/6502-cpp.git
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24012c1ff7
Thank you to the viewers who pointed out the issue at the end of the stream. At this point, simple code works, but the conditional from the joystick input does not seem to work yet. * also add location header for linker * also filter errors and directives better
45 lines
715 B
C++
45 lines
715 B
C++
#include <cstdint>
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enum Colors : uint8_t
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{
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WHITE=0x01
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};
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static volatile uint8_t &memory_loc(const uint16_t loc)
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{
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return *reinterpret_cast<volatile uint8_t *>(loc);
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}
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static void decrement_border_color()
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{
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--memory_loc(0xd020);
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}
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static void increment_border_color()
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{
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++memory_loc(0xd020);
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}
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static bool joystick_down()
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{
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uint8_t joystick_state = memory_loc(0xDC00);
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return (joystick_state & 0x2) == 0;
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}
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int main()
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{
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const auto background_color = [](Colors col) {
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memory_loc(0xd021) = static_cast<uint8_t>(col);
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};
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background_color(Colors::WHITE);
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while(true) {
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if (joystick_down()) {
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// increment_border_color();
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} else {
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decrement_border_color();
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}
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}
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}
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