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Rev 32 |
#pragma once
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#pragma once
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class clsKeyboard
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#include "clsDevice.h"
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class clsKeyboard : public clsDevice
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{
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{
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unsigned __int8 buffer[32];
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unsigned __int8 buffer[32];
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int head;
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int head;
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int tail;
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int tail;
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public:
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public:
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volatile unsigned __int8 scancode;
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volatile unsigned __int8 scancode;
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volatile unsigned __int8 status;
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volatile unsigned __int8 status;
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clsKeyboard(void);
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clsKeyboard(void);
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~clsKeyboard(void);
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~clsKeyboard(void);
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bool IsSelected(unsigned int ad) { return ((ad & 0xFFFFFFF0)==0xFFDC0000); };
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bool IsSelected(unsigned int ad) { return ((ad & 0xFFFFFFF0)==0xFFDC0000); };
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void Put(unsigned __int8 sc) {
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void Put(unsigned __int8 sc) {
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scancode = sc;
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scancode = sc;
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buffer[head] = sc;
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buffer[head] = sc;
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head++;
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head++;
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head &= 31;
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head &= 31;
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};
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};
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unsigned __int8 Get() {
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unsigned __int8 Get() {
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unsigned __int8 sc;
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unsigned __int8 sc;
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sc = 0;
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sc = 0;
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if (head != tail) {
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if (head != tail) {
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sc = buffer[tail];
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sc = buffer[tail];
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tail++;
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tail++;
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tail &= 31;
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tail &= 31;
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}
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}
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return sc;
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return sc;
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};
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};
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unsigned __int8 Peek(int amt) {
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unsigned __int8 Peek(int amt) {
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unsigned __int8 sc;
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unsigned __int8 sc;
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int ndx;
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int ndx;
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ndx = tail + amt;
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ndx = tail + amt;
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ndx &= 31;
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ndx &= 31;
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sc = buffer[ndx];
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sc = buffer[ndx];
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return sc;
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return sc;
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};
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};
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unsigned __int8 GetStatus() {
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unsigned __int8 GetStatus() {
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if (head != tail)
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if (head != tail)
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return 0x80;
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return 0x80;
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else
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else
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return 0x00;
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return 0x00;
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};
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};
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};
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};
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