mirror of https://github.com/lefticus/6502-cpp.git
62 lines
3.1 KiB
C++
62 lines
3.1 KiB
C++
#ifndef INC_6502_C_X16_HPP
|
|
#define INC_6502_C_X16_HPP
|
|
|
|
#include "../personality.hpp"
|
|
|
|
struct X16 : Personality
|
|
{
|
|
|
|
void insert_autostart_sequence(std::vector<mos6502> &new_instructions) const override
|
|
{
|
|
constexpr static auto start_address = 0x0801;
|
|
|
|
// first 2 bytes is the load address for a PRG file.
|
|
new_instructions.emplace_back(ASMLine::Type::Directive, ".word " + std::to_string(start_address));
|
|
new_instructions.emplace_back(ASMLine::Type::Directive, "* = " + std::to_string(start_address));
|
|
new_instructions.emplace_back(ASMLine::Type::Directive, "; jmp to start of program with BASIC");
|
|
new_instructions.emplace_back(ASMLine::Type::Directive, ".byt $0B,$08,$0A,$00,$9E,$32,$30,$36,$31,$00,$00,$00");
|
|
}
|
|
|
|
[[nodiscard]] Operand get_register(const int reg_num) const override
|
|
{
|
|
switch (reg_num) {
|
|
// based on c64, they are basically the same system, but I'm using a different file so they can fork from each other
|
|
case 0: return Operand(Operand::Type::literal, "$4e");// unused, int->fp routine pointer
|
|
case 1: return Operand(Operand::Type::literal, "$4f");
|
|
case 2: return Operand(Operand::Type::literal, "$50");// unused
|
|
case 3: return Operand(Operand::Type::literal, "$51");// unused
|
|
case 4: return Operand(Operand::Type::literal, "$52");// bit buffer for rs232
|
|
case 5: return Operand(Operand::Type::literal, "$53");// counter for rs232
|
|
case 6: return Operand(Operand::Type::literal, "$54");// unused
|
|
case 7: return Operand(Operand::Type::literal, "$55");// unused
|
|
case 8: return Operand(Operand::Type::literal, "$56");// unused
|
|
case 9: return Operand(Operand::Type::literal, "$57");// unused
|
|
case 10: return Operand(Operand::Type::literal, "$58");// Current BASIC line number
|
|
case 11: return Operand(Operand::Type::literal, "$59");// Current BASIC line number
|
|
case 12: return Operand(Operand::Type::literal, "$5a");// arithmetic register #3
|
|
case 13: return Operand(Operand::Type::literal, "$5b");
|
|
case 14: return Operand(Operand::Type::literal, "$5c");
|
|
case 15: return Operand(Operand::Type::literal, "$5d");
|
|
case 16: return Operand(Operand::Type::literal, "$5e");
|
|
case 17: return Operand(Operand::Type::literal, "$5f");
|
|
case 18: return Operand(Operand::Type::literal, "$60");
|
|
case 19: return Operand(Operand::Type::literal, "$61");
|
|
case 20: return Operand(Operand::Type::literal, "$62");
|
|
case 21: return Operand(Operand::Type::literal, "$63");
|
|
case 22: return Operand(Operand::Type::literal, "$64");
|
|
case 23: return Operand(Operand::Type::literal, "$65");
|
|
case 24: return Operand(Operand::Type::literal, "$66");
|
|
case 25: return Operand(Operand::Type::literal, "$67");
|
|
case 26: return Operand(Operand::Type::literal, "$68");
|
|
case 27: return Operand(Operand::Type::literal, "$69");
|
|
case 28: return Operand(Operand::Type::literal, "$6a");
|
|
case 29: return Operand(Operand::Type::literal, "$6b");
|
|
case 30: return Operand(Operand::Type::literal, "$6c");
|
|
case 31: return Operand(Operand::Type::literal, "$6d");
|
|
}
|
|
throw std::runtime_error("Unhandled register number: " + std::to_string(reg_num));
|
|
}
|
|
};
|
|
|
|
#endif// INC_6502_C_X16_HPP
|