6e17f4b747
devices. That is now replaced by a return 012345 so that the (emulated) devices don't get confused (e.g. the tty would miss characters).
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
// (C) 2018 by Folkert van Heusden
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// Released under Apache License v2.0
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#pragma once
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#include <stdint.h>
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#include <stdio.h>
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#include "tm-11.h"
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#include "rk05.h"
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#include "rl02.h"
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class cpu;
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class memory;
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class tty;
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typedef struct
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{
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uint16_t par, pdr;
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} page_t;
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class bus
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{
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private:
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cpu *c { nullptr };
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tm_11 *tm11 { nullptr };
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rk05 *rk05_ { nullptr };
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rl02 *rl02_ { nullptr };
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tty *tty_ { nullptr };
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memory *m { nullptr };
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// 8 pages, D/I, 3 modes and 1 invalid mode
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page_t pages[4][2][8];
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uint16_t MMR0 { 0 }, MMR1 { 0 }, MMR2 { 0 }, MMR3 { 0 }, CPUERR { 0 }, PIR { 0 }, CSR { 0 };
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uint16_t switch_register { 0 };
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uint16_t lf_csr { 0 };
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bool debug_mode { false };
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public:
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bus();
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~bus();
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void clearmem();
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void set_debug_mode(const bool state) { debug_mode = state; }
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void add_cpu(cpu *const c) { this -> c = c; }
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void add_tm11(tm_11 *tm11) { this -> tm11 = tm11; }
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void add_rk05(rk05 *rk05_) { this -> rk05_ = rk05_; }
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void add_rl02(rl02 *rl02_) { this -> rl02_ = rl02_; }
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void add_tty(tty *tty_) { this -> tty_ = tty_; }
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cpu *getCpu() { return this->c; }
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tty *getTty() { return this->tty_; }
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void init(); // invoked by 'RESET' command
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void set_lf_crs_b7();
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uint8_t get_lf_crs();
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uint16_t read(const uint16_t a, const bool word_mode, const bool use_prev, const bool peek_only=false);
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uint16_t readByte(const uint16_t a) { return read(a, true, false); }
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uint16_t readWord(const uint16_t a);
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uint16_t peekWord(const uint16_t a);
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uint16_t readUnibusByte(const uint16_t a);
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uint16_t write(const uint16_t a, const bool word_mode, uint16_t value, const bool use_prev);
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uint8_t writeByte(const uint16_t a, const uint8_t value) { return write(a, true, value, false); }
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uint16_t writeWord(const uint16_t a, const uint16_t value);
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void writeUnibusByte(const uint16_t a, const uint8_t value);
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uint16_t getMMR0() { return MMR0; }
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uint16_t getMMR1() { return MMR1; }
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uint16_t getMMR2() { return MMR2; }
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uint16_t getMMR3() { return MMR3; }
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void clearMMR1();
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void addToMMR1(const int8_t delta, const uint8_t reg);
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void setMMR2(const uint16_t value) { MMR2 = value; } // address
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uint16_t get_switch_register() const { return switch_register; }
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uint32_t calculate_physical_address(const int run_mode, const uint16_t a, const bool trap_on_failure, const bool is_write, const bool peek_only);
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};
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