50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
#include "stdafx.h"
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#include "mc6821.h"
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#include "state.h"
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void MC6821::executionLoop() {
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//update the registers
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kbd = MemoryMap::Instance()->read_byte(WideAddress{ 0xD0, 0x10 }, false);
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kbdcr = MemoryMap::Instance()->read_byte(WideAddress{ 0xD0, 0x11 }, false);
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dsp = MemoryMap::Instance()->read_byte(WideAddress{ 0xD0, 0x12 }, false);
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dspcr = MemoryMap::Instance()->read_byte(WideAddress{ 0xD0, 0x13 }, false);
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//Character is waiting for the display
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if ((dsp & 0x80) == 0x80) {
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dsp = dsp - 0x80;
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if (dsp <= 0x7f) {
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if (dsp == 0x0d) {
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WCHAR output[2];
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wsprintfW(output, L"%c", dsp);
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outputBuffer = dsp;
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OutputDebugString(output);
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OutputDebugStringW(L"\r\n");
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}
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else if (dsp != 0x7f) {
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WCHAR output[2];
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wsprintfW(output, L"%c", dsp);
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outputBuffer = dsp;
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OutputDebugString(output);
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}
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}
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MemoryMap::Instance()->write_byte(WideAddress(0xD0, 0x12), dsp, false);
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}
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}
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uint8_t MC6821::getOutputBuffer() {
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uint8_t character = outputBuffer;
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outputBuffer = 0x00;
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return character;
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}
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MC6821Status MC6821::getStatus() {
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MC6821Status status;
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status.DSP = dsp;
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status.DSPCR = dspcr;
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status.KBD = kbd;
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status.KBDCR = kbdcr;
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return status;
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} |