mirror of https://github.com/trudnai/Steve2.git
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
//
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// main.c
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// 6502
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//
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// Created by Tamas Rudnai on 7/14/19.
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// Copyright © 2019, 2020 Tamas Rudnai. All rights reserved.
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//
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// This file is part of Steve ][ -- The Apple ][ Emulator.
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//
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// Steve ][ is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Steve ][ is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Steve ][. If not, see <https://www.gnu.org/licenses/>.
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//
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#ifndef __6502_INSTR_TRANSFER_H__
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#define __6502_INSTR_TRANSFER_H__
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/**
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TAX Transfer Accumulator to Index X
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A -> X N Z C I D V
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+ + - - - -
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addressing assembler opc bytes cyles
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--------------------------------------------
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implied TAX AA 1 2
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**/
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INLINE void TAX() {
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dbgPrintf("TAX(%02X) ", m6502.A);
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disPrintf(disassembly.inst, "TAX");
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set_flags_NZ(m6502.X = m6502.A);
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}
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/**
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TXA Transfer Index X to Accumulator
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X -> A N Z C I D V
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+ + - - - -
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addressing assembler opc bytes cyles
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--------------------------------------------
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implied TXA 8A 1 2
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**/
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INLINE void TXA() {
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dbgPrintf("TXA(%02X) ", m6502.X);
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disPrintf(disassembly.inst, "TXA");
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set_flags_NZ(m6502.A = m6502.X);
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}
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/**
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TAY Transfer Accumulator to Index Y
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A -> Y N Z C I D V
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+ + - - - -
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addressing assembler opc bytes cyles
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--------------------------------------------
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implied TAY A8 1 2
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**/
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INLINE void TAY() {
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dbgPrintf("TAY ");
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disPrintf(disassembly.inst, "TAY");
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set_flags_NZ(m6502.Y = m6502.A);
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}
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/**
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TYA Transfer Index Y to Accumulator
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Y -> A N Z C I D V
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+ + - - - -
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addressing assembler opc bytes cyles
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--------------------------------------------
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implied TYA 98 1 2
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**/
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INLINE void TYA() {
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dbgPrintf("TYA(%02X) ", m6502.Y);
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disPrintf(disassembly.inst, "TYA");
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set_flags_NZ(m6502.A = m6502.Y);
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}
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/**
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TSX Transfer Stack Pointer to Index X
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SP -> X N Z C I D V
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+ + - - - -
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addressing assembler opc bytes cyles
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--------------------------------------------
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implied TSX BA 1 2
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**/
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INLINE void TSX() {
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dbgPrintf("TSX(%02X) ", m6502.SP);
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disPrintf(disassembly.inst, "TSX");
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set_flags_NZ(m6502.X = m6502.SP);
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}
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/**
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TXS Transfer Index X to Stack Register
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X -> SP N Z C I D V
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- - - - - -
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addressing assembler opc bytes cyles
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--------------------------------------------
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implied TXS 9A 1 2
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**/
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INLINE void TXS() {
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dbgPrintf("TXS(%02X) ", m6502.X);
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disPrintf(disassembly.inst, "TXS");
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m6502.SP = m6502.X;
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}
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#endif // __6502_INSTR_TRANSFER_H__
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