68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
// (C) 2024 by Folkert van Heusden
|
|
// Released under MIT license
|
|
// Some of the code is translated from Neil Webber's PDP11/70 emulator
|
|
|
|
#pragma once
|
|
|
|
#include "gen.h"
|
|
#include <ArduinoJson.h>
|
|
#include <atomic>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "disk_device.h"
|
|
#include "disk_backend.h"
|
|
|
|
|
|
#define RP06_CS1 0176700 // control register
|
|
#define RP06_WC 0176702 // word count
|
|
#define RP06_UBA 0176704 // UNIBUS address
|
|
#define RP06_DA 0176706 // desired address
|
|
#define RP06_CS2 0176710 // control/status register 2
|
|
#define RP06_DS 0176712 // drive status
|
|
#define RP06_AS 0176716 // unified attention status
|
|
#define RP06_RMLA 0176720 // lookahead (sector under head!!)
|
|
#define RP06_OFR 0176732 // heads offset
|
|
#define RP06_DC 0176734 // desired cylinder
|
|
#define RP06_CC 0176736 // "current cylinder" and/or holding register
|
|
#define RP06_BAE 0176750 // address extension (pdp11/70 extra phys bits)
|
|
#define RP06_BASE RP06_CS1
|
|
#define RP06_END (RP06_BAE + 2)
|
|
|
|
|
|
class bus;
|
|
|
|
class rp06: public disk_device
|
|
{
|
|
private:
|
|
bus *const b;
|
|
|
|
uint16_t registers[32] { };
|
|
|
|
std::atomic_bool *const disk_read_activity { nullptr };
|
|
std::atomic_bool *const disk_write_activity { nullptr };
|
|
|
|
int reg_num(uint16_t addr) const;
|
|
uint32_t getphysaddr() const;
|
|
uint32_t compute_offset() const;
|
|
|
|
public:
|
|
rp06(bus *const b, std::atomic_bool *const disk_read_activity, std::atomic_bool *const disk_write_activity);
|
|
virtual ~rp06();
|
|
|
|
void begin() override;
|
|
void reset() override;
|
|
|
|
void show_state(console *const cnsl) const override;
|
|
|
|
JsonDocument serialize() const;
|
|
static rp06 *deserialize(const JsonVariantConst j, bus *const b);
|
|
|
|
uint8_t read_byte(const uint16_t addr) override;
|
|
uint16_t read_word(const uint16_t addr) override;
|
|
|
|
void write_byte(const uint16_t addr, const uint8_t v) override;
|
|
void write_word(const uint16_t addr, const uint16_t v) override;
|
|
};
|