58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
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#include "mem.h"
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#include <stdio.h>
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unsigned char memory[4096];
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extern unsigned char DEFAULT_FONT[];
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void MemInit(){
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MemSet(0,0,4096);
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MemCopy(DEFAULT_FONT,16*5,ADDR_FONT);
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}
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void MemSet(int addr, unsigned char value, int size){
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for(int i=0;i<size;i++)
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memory[addr+i]=value;
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}
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void MemCopy(unsigned char *data, int size, int addr){
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for(int i=0;i<size;i++)
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memory[addr+i]=data[i];
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}
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void MemRead(unsigned char *data, int size, int addr){
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int location=addr;
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for(int i=0;i<size;i++)
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data[i]=memory[addr+i];
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}
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void MemLoadROM(char *path){
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char byte;
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FILE *ptr;
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ptr=fopen(path,"rb");
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int location=ADDR_ROM;
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while(fread(&byte,1,1,ptr)==1){
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MemSet(location,byte,1);
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location++;
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}
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fclose(ptr);
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}
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unsigned char DEFAULT_FONT[]={
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0xF0, 0x90, 0x90, 0x90, 0xF0, // 0
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0x20, 0x60, 0x20, 0x20, 0x70, // 1
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0xF0, 0x10, 0xF0, 0x80, 0xF0, // 2
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0xF0, 0x10, 0xF0, 0x10, 0xF0, // 3
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0x90, 0x90, 0xF0, 0x10, 0x10, // 4
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0xF0, 0x80, 0xF0, 0x10, 0xF0, // 5
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0xF0, 0x80, 0xF0, 0x90, 0xF0, // 6
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0xF0, 0x10, 0x20, 0x40, 0x40, // 7
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0xF0, 0x90, 0xF0, 0x90, 0xF0, // 8
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0xF0, 0x90, 0xF0, 0x10, 0xF0, // 9
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0xF0, 0x90, 0xF0, 0x90, 0x90, // A
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0xE0, 0x90, 0xE0, 0x90, 0xE0, // B
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0xF0, 0x80, 0x80, 0x80, 0xF0, // C
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0xE0, 0x90, 0x90, 0x90, 0xE0, // D
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0xF0, 0x80, 0xF0, 0x80, 0xF0, // E
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0xF0, 0x80, 0xF0, 0x80, 0x80}; // F
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