Subversion Repositories s80186

// Copyright Jamie Iles, 2017

//

// This file is part of s80x86.

//

// s80x86 is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// s80x86 is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with s80x86.  If not, see .

// CLC

.at 0xf8;

    b_sel IMMEDIATE, immediate 0x0, alu_op SETFLAGSB, update_flags CF,

        next_instruction;

// STC

.at 0xf9;

    b_sel IMMEDIATE, immediate 0xffff, alu_op SETFLAGSB, update_flags CF,

        next_instruction;

// CLI

.at 0xfa;

    b_sel IMMEDIATE, immediate 0x0, alu_op SETFLAGSB, update_flags IF,

        next_instruction;

// STI

.at 0xfb;

    b_sel IMMEDIATE, immediate 0xffff, alu_op SETFLAGSB, update_flags IF,

        ext_int_inhibit, next_instruction;

// CLD

.at 0xfc;

    b_sel IMMEDIATE, immediate 0x0, alu_op SETFLAGSB, update_flags DF,

        next_instruction;

// STD

.at 0xfd;

    b_sel IMMEDIATE, immediate 0xffff, alu_op SETFLAGSB, update_flags DF,

        next_instruction;

// CMC

.at 0xf5;

    alu_op CMC, update_flags CF, next_instruction;

// LAHF

.at 0x9f;

    alu_op GETFLAGS, rd_sel_source MICROCODE_RD_SEL, rd_sel AH,

        width W8, next_instruction;

// SAHF

.at 0x9e;

    ra_sel AH, width W8, jmp sahf;

.auto_address;

sahf:

    a_sel RA, alu_op SETFLAGSA, update_flags CF PF AF ZF SF, next_instruction;

// SETALC

.at 0xd6;

    ra_sel CX, rb_cl, jmp setalc;

.auto_address;

setalc:

    width W8, a_sel RA, b_sel RB, alu_op SBB,

        rd_sel_source MICROCODE_RD_SEL, rd_sel AL, next_instruction;