all repos — xyw @ 66dc8e0b4f3b24282e2f7769f0d3ce18516bdbe2

A minimal virtual machine and assembler for terminals.

devices/terminal.c

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#include <stdio.h>
#include "../xyw.h"

/* terminal device */
#define TERMINAL_INPUT 0x0
#define TERMINAL_OUTPUT 0x1
#define TERMINAL_ON_KEYPRESS 0x2

void terminal_output(xyw_byte *data, xyw_byte addr, xyw_byte *error)
{
    (void)error;
    switch (addr)
    {
    case TERMINAL_INPUT:
    {
        xyw_word vector = XYW_PEEKW(&data[TERMINAL_ON_KEYPRESS]);
        if (vector)
        {
            xyw_eval(vector);
        }
        break;
    }
    case TERMINAL_OUTPUT:
        fputc(data[addr], stdout);
        fflush(stdout);
        break;
    }
}

xyw_byte terminal_input(xyw_byte *data, xyw_byte addr, xyw_byte *error)
{
    (void)error;
    return data[addr];
}