edisonJrDemo

#include <errno.h>
#include <string.h>
#include <stdlib.h>

#include "miniat/miniat.h"

#define M_HIGH 1
#define M_LOW 0

typedef struct
{
    int connected;
    m_uword address;
    m_bus *bus;
}p_simple_kb;

typedef struct
{
    int connected;
    m_uword address;
    m_bus *bus;
}p_simple_term;

void p_simple_kb_clock(p_simple_kb *k);
void p_simple_term_clock(p_simple_term *t);
static void cleanup();

miniat *iMiniAT = NULL;
p_simple_kb *keyboard = NULL;
p_simple_term *terminal = NULL;

int main(int argc, char *argv[])
{
    m_bus *bus_state;
    char data;
    if (argc != 2) {
        fprintf(stderr, "You must specify a bin file name to run");
        THROW(m_error_num_illegal_argument);
    }
    
    atexit(cleanup);
    
    iMiniAT = miniat_file_new(argv[1]);
    
    bus_state = miniat_conector_bus_get(iMiniAT);
    
    terminal = malloc(sizeof(p_simple_term));
    terminal->bus = (m_bus *)malloc(sizeof(m_bus));
    terminal -> address = 0x4002;
    terminal -> connected = 0;
    
    printf("This is a demo for the Edison Jr.!\n");
    
    while(1)
    {
        miniat_clock(iMiniAT);
        
        if(bus_state->req && (bus_state->address == 0x4002) && bus_state->rW && !bus_state->ack)
        {
            bus_state->ack = M_HIGH;
            printf("%c", (char)bus_state->data);
            fflush(stdout);
        }
        else if(bus_state->ack && (bus_state->address == 0x4002))
        {
            bus_state->ack = M_LOW;
        }
    }
    
    miniat_free(iMiniAT);
    
    if(!terminal->connected) {
        free(terminal->bus);
    }
    free(terminal);
    
    return 0;
}

static void cleanup() {
    
    if(iMiniAT) {
        miniat_free(iMiniAT);
    }
    if(terminal) {
        if(!terminal->connected) {
            free(terminal->bus);
        }
        free(terminal);
    }
}