// Commander X16 Emulator — a virtual serial/network card.

//

// A 16450-compatible UART at an expansion base with a Zimodem-enough modem

// behind it: Hayes AT commands in command mode, and a dial that opens a real

// TCP socket from the emulator process, after which bytes flow both ways.

// Enough for a program written against the TexElec serial/ESP32 card to be

// tested here, dialling a service on the developer's machine, without the

// card. It is not a model of the card's timing; a byte written is on the

// wire at once and a byte from the wire is readable at once.

//

// Only the card's network half (the eight registers at the base) exists.

// The DE-9 serial half, eight bytes above it, reads as open bus.

#pragma once

#include <stdbool.h>

#include <stdint.h>

extern bool has_netcard;

extern uint16_t netcard_addr;

void netcard_init(void);

void netcard_step(void);

uint8_t netcard_read(uint8_t reg, bool debugOn);

void netcard_write(uint8_t reg, uint8_t val);