//	signetics.h
//	Signetics refers to the various Signetics brand chips which the Apple I came with, including a character ROM, and a shift-register based video memory.

#include"../cpu/core.h"
#include"stdlib.h"

const byte CharacterROM[0x40] = {
	'@' , 'A' , 'B' , 'C' , 'D' , 'E' , 'F' , 'G' , 'H' , 'I' , 'J' , 'K' , 'L' , 'M' , 'N' , 'O' ,
	'P' , 'Q' , 'R' , 'S' , 'T' , 'U' , 'V' , 'W' , 'X' , 'Y' , 'Z' , '[' , '\\', ']' , '^' , '_' ,
	' ' , '!' , '"' , '#' , '$' , '%' , '&' , '\'', '(' , ')' , '*' , '+' , ',' , '-' , '.' , '/' ,
	'0' , '1' , '2' , '3' , '4' , '5' , '6' , '7' , '8' , '9' , ':' , ';' , '<' , '=' , '>' , '?'
};

const byte* TerminalShiftRegister;

byte* TerminalShiftRegisterPosition;

int TerminalShiftRegisterOffset;

byte ToAppleASCII(char x)
{
	if (x < 0x20 || x >= 0x60)
		return -1;
	if (x >= 0x40)
		x -= 0x40;
	return x;
}

byte ToRegularASCII(char x)
{
	if (x < 0x20)
		x += 0x40;
	return x;
}