#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <ctype.h>
#include <assert.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>

typedef uint8_t uint8, byte;
typedef uint16_t uint16, word;
typedef uint32_t uint32;

#define WD(hi, lo) W((hi)<<8 | (lo))
#define W(w) ((word)(w))
#define M8  0377
#define M16 0177777
#define B7  0000200
#define B15 0100000
#define nil NULL

#define SETMASK(l, r, m) l = ((l)&~(m) | (r)&(m))


//#define trace printf
#define trace(...)

int hasinput(int fd);
int dial(char *host, int port);
void serve(int port, void (*handlecon)(int, void*), void *arg);
void nodelay(int fd);

word sgn(word w);
word sxt(byte b);

typedef struct Bus Bus;
typedef struct Busdev Busdev;

struct Busdev
{
	Busdev *next;
	void *dev;
	int (*dati)(Bus *bus, void *dev);
	int (*dato)(Bus *bus, void *dev);
	int (*datob)(Bus *bus, void *dev);
	int (*svc)(Bus *bus, void *dev);
	int (*bg)(void *dev);
	void (*reset)(void *dev);
};
void reset_null(void *dev);

struct Bus
{
	Busdev *devs;
	uint32 addr;
	word data;
};
int dati_bus(Bus *bus);
int dato_bus(Bus *bus);
int datob_bus(Bus *bus);

typedef struct Memory Memory;
struct Memory
{
	word *mem;
	uint32 start, end;
};
int dati_mem(Bus *bus, void *dev);
int dato_mem(Bus *bus, void *dev);
int datob_mem(Bus *bus, void *dev);

typedef struct KE11 KE11;
struct KE11
{
	word ac;
	word mq;
	word x;
	byte sc;	/* 6 bits */
	byte sr;
};
int dati_ke11(Bus *bus, void *dev);
int dato_ke11(Bus *bus, void *dev);
int datob_ke11(Bus *bus, void *dev);
void reset_ke11(void *dev);