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bporcella |
///////////////////////////////////////////////////////////////////////////////////////////////////
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// //
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// file name: opcodes.v //
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// description: opcode parameters for z80 //
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// project: wb_z80 //
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// //
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// Author: B.J. Porcella //
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// e-mail: bporcella@sbcglobal.net //
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// //
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// //
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// //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2000-2002 B.J. Porcella //
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// Real Time Solutions //
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// //
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// //
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// This source file may be used and distributed without //
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// restriction provided that this copyright statement is not //
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// removed from the file and that any derivative work contains //
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// the original copyright notice and the associated disclaimer. //
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// //
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// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY //
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED //
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// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS //
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// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR //
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// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, //
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES //
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE //
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// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR //
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// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF //
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT //
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT //
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// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE //
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// POSSIBILITY OF SUCH DAMAGE. //
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// //
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//-------1---------2---------3--------Comments on file -------------7---------8---------9--------0
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// This file is fundamentally a hack of an opcode file found on:
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// http://www.z80.info/ (perhaps written by Thomas Scherrer)
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//
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// The purpose of the origiional file was to aid in low level z80 software debug.
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// Here, we are trying to make the parameters we use for instruction decoding
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// as easy to understand as possible.
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//
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// The origional file is included as a comment below. (this is a very long file)
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// It is then re-produced with transformations -- so the significance of the parameters should
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// be very clear.
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//
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// Note how assembler syntax is transformed
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// into verilog symbols.
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//
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//
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// I'm going to define all parameters as standard integer length as they will be used
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// in comparisons of various lengths..............
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// generally 8 bits, but there is 3 bit extension that may apply to any parameter...
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// 0
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// 1 CBgrp (shifts and Bit banging)
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// 2 DDgrp (mostly indexed addressing)
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// 3 DDCBgrp (indexed bit banging)
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// 3 EDgrp (a wild mix of stuff )
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// 4 FDgrp (more indexed stuff )
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// 5 FDCBgrp (indexed bit banging)
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//
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//
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//-------1---------2---------3--------CVS Log -----------------------7---------8---------9--------0
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//
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bporcella |
// $Id: opcodes.v,v 1.2 2004-05-18 22:31:20 bporcella Exp $
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bporcella |
//
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bporcella |
// $Date: 2004-05-18 22:31:20 $
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// $Revision: 1.2 $
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bporcella |
// $Author: bporcella $
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// $Locker: $
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// $State: Exp $
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//
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// Change History:
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// $Log: not supported by cvs2svn $
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bporcella |
// Revision 1.1 2004/04/17 18:26:06 bporcella
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// put this here to try an end-run around lint mikefile problem
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//
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bporcella |
// Revision 1.1.1.1 2004/04/13 23:47:56 bporcella
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// import first files
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//
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//
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//
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//-------1---------2---------3--------Comments on file -------------7---------8---------9--------0
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//
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parameter NOP = 10'h00,// NOP ; 00
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LDsBC_NN = 10'h01,// LD BC,NN ; 01 XX XX
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LDs6BC7_A = 10'h02,// LD (BC),A ; 02
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INCsBC = 10'h03,// INC BC ; 03
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INCsB = 10'h04,// INC B ; 04
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DECsB = 10'h05,// DEC B ; 05
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LDsB_N = 10'h06,// LD B,N ; 06 XX
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RLCA = 10'h07,// RLCA ; 07
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EXsAF_AFp = 10'h08,// EX AF,AF' ; 08
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ADDsHL_BC = 10'h09,// ADD HL,BC ; 09
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LDsA_6BC7 = 10'h0A,// LD A,(BC) ; 0A
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DECsBC = 10'h0B,// DEC BC ; 0B
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INCsC = 10'h0C,// INC C ; 0C
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DECsC = 10'h0D,// DEC C ; 0D
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LDsC_N = 10'h0E,// LD C,N ; 0E XX
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RRCA = 10'h0F,// RRCA ; 0F
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DJNZs$t2 = 10'h10,// DJNZ $+2 ; 10 XX
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LDsDE_NN = 10'h11,// LD DE,NN ; 11 XX XX
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LDs6DE7_A = 10'h12,// LD (DE),A ; 12
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INCsDE = 10'h13,// INC DE ; 13
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INCsD = 10'h14,// INC D ; 14
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DECsD = 10'h15,// DEC D ; 15
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LDsD_N = 10'h16,// LD D,N ; 16 XX
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RLA = 10'h17,// RLA ; 17
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JRs$t2 = 10'h18,// JR $+2 ; 18 XX
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ADDsHL_DE = 10'h19,// ADD HL,DE ; 19
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LDsA_6DE7 = 10'h1A,// LD A,(DE) ; 1A
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DECsDE = 10'h1B,// DEC DE ; 1B
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INCsE = 10'h1C,// INC E ; 1C
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DECsE = 10'h1D,// DEC E ; 1D
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LDsE_N = 10'h1E,// LD E,N ; 1E XX
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RRA = 10'h1F,// RRA ; 1F
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JRsNZ_$t2 = 10'h20,// JR NZ,$+2 ; 20
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LDsHL_NN = 10'h21,// LD HL,NN ; 21 XX XX
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LDs6NN7_HL = 10'h22,// LD (NN),HL ; 22 XX XX
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INCsHL = 10'h23,// INC HL ; 23
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INCsH = 10'h24,// INC H ; 24
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DECsH = 10'h25,// DEC H ; 25
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LDsH_N = 10'h26,// LD H,N ; 26 XX
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DAA = 10'h27,// DAA ; 27
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JRsZ_$t2 = 10'h28,// JR Z,$+2 ; 28 XX
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ADDsHL_HL = 10'h29,// ADD HL,HL ; 29
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LDsHL_6NN7 = 10'h2A,// LD HL,(NN) ; 2A XX XX
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DECsHL = 10'h2B,// DEC HL ; 2B
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INCsL = 10'h2C,// INC L ; 2C
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DECsL = 10'h2D,// DEC L ; 2D
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LDsL_N = 10'h2E,// LD L,N ; 2E XX
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CPL = 10'h2F,// CPL ; 2F
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JRsNC_$t2 = 10'h30,// JR NC,$+2 ; 30 XX
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LDsSP_NN = 10'h31,// LD SP,NN ; 31 XX XX
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LDs6NN7_A = 10'h32,// LD (NN),A ; 32 XX XX
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INCsSP = 10'h33,// INC SP ; 33
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INCs6HL7 = 10'h34,// INC (HL) ; 34
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DECs6HL7 = 10'h35,// DEC (HL) ; 35
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LDs6HL7_N = 10'h36,// LD (HL),N ; 36 XX
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SCF = 10'h37,// SCF ; 37
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JRsC_$t2 = 10'h38,// JR C,$+2 ; 38 XX
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ADDsHL_SP = 10'h39,// ADD HL,SP ; 39
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LDsA_6NN7 = 10'h3A,// LD A,(NN) ; 3A XX XX
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DECsSP = 10'h3B,// DEC SP ; 3B
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INCsA = 10'h3C,// INC A ; 3C
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DECsA = 10'h3D,// DEC A ; 3D
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LDsA_N = 10'h3E,// LD A,N ; 3E XX
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CCF = 10'h3F,// CCF ; 3F
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LDsB_B = 10'h40,// LD B,B ; 40
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LDsB_C = 10'h41,// LD B,C ; 41
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LDsB_D = 10'h42,// LD B,D ; 42
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LDsB_E = 10'h43,// LD B,E ; 43
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LDsB_H = 10'h44,// LD B,H ; 44
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LDsB_L = 10'h45,// LD B,L ; 45
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LDsB_6HL7 = 10'h46,// LD B,(HL) ; 46
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LDsB_A = 10'h47,// LD B,A ; 47
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LDsC_B = 10'h48,// LD C,B ; 48
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LDsC_C = 10'h49,// LD C,C ; 49
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LDsC_D = 10'h4A,// LD C,D ; 4A
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LDsC_E = 10'h4B,// LD C,E ; 4B
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LDsC_H = 10'h4C,// LD C,H ; 4C
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LDsC_L = 10'h4D,// LD C,L ; 4D
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LDsC_6HL7 = 10'h4E,// LD C,(HL) ; 4E
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LDsC_A = 10'h4F,// LD C,A ; 4F
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LDsD_B = 10'h50,// LD D,B ; 50
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LDsD_C = 10'h51,// LD D,C ; 51
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LDsD_D = 10'h52,// LD D,D ; 52
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LDsD_E = 10'h53,// LD D,E ; 53
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LDsD_H = 10'h54,// LD D,H ; 54
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LDsD_L = 10'h55,// LD D,L ; 55
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LDsD_6HL7 = 10'h56,// LD D,(HL) ; 56
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LDsD_A = 10'h57,// LD D,A ; 57
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LDsE_B = 10'h58,// LD E,B ; 58
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LDsE_C = 10'h59,// LD E,C ; 59
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LDsE_D = 10'h5A,// LD E,D ; 5A
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LDsE_E = 10'h5B,// LD E,E ; 5B
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LDsE_H = 10'h5C,// LD E,H ; 5C
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LDsE_L = 10'h5D,// LD E,L ; 5D
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LDsE_6HL7 = 10'h5E,// LD E,(HL) ; 5E
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LDsE_A = 10'h5F,// LD E,A ; 5F
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LDsH_B = 10'h60,// LD H,B ; 60
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LDsH_C = 10'h61,// LD H,C ; 61
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LDsH_D = 10'h62,// LD H,D ; 62
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LDsH_E = 10'h63,// LD H,E ; 63
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LDsH_H = 10'h64,// LD H,H ; 64
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LDsH_L = 10'h65,// LD H,L ; 65
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LDsH_6HL7 = 10'h66,// LD H,(HL) ; 66
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LDsH_A = 10'h67,// LD H,A ; 67
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LDsL_B = 10'h68,// LD L,B ; 68
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LDsL_C = 10'h69,// LD L,C ; 69
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LDsL_D = 10'h6A,// LD L,D ; 6A
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LDsL_E = 10'h6B,// LD L,E ; 6B
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LDsL_H = 10'h6C,// LD L,H ; 6C
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LDsL_L = 10'h6D,// LD L,L ; 6D
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LDsL_6HL7 = 10'h6E,// LD L,(HL) ; 6E
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LDsL_A = 10'h6F,// LD L,A ; 6F
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LDs6HL7_B = 10'h70,// LD (HL),B ; 70
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LDs6HL7_C = 10'h71,// LD (HL),C ; 71
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LDs6HL7_D = 10'h72,// LD (HL),D ; 72
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LDs6HL7_E = 10'h73,// LD (HL),E ; 73
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| 203 |
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LDs6HL7_H = 10'h74,// LD (HL),H ; 74
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LDs6HL7_L = 10'h75,// LD (HL),L ; 75
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HALT = 10'h76,// HALT ; 76
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LDs6HL7_A = 10'h77,// LD (HL),A ; 77
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LDsA_B = 10'h78,// LD A,B ; 78
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LDsA_C = 10'h79,// LD A,C ; 79
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LDsA_D = 10'h7A,// LD A,D ; 7A
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| 210 |
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LDsA_E = 10'h7B,// LD A,E ; 7B
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| 211 |
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LDsA_H = 10'h7C,// LD A,H ; 7C
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| 212 |
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LDsA_L = 10'h7D,// LD A,L ; 7D
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| 213 |
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LDsA_6HL7 = 10'h7E,// LD A,(HL) ; 7E
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| 214 |
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LDsA_A = 10'h7F,// LD A,A ; 7F
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| 215 |
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ADDsA_B = 10'h80,// ADD A,B ; 80
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| 216 |
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ADDsA_C = 10'h81,// ADD A,C ; 81
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| 217 |
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ADDsA_D = 10'h82,// ADD A,D ; 82
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| 218 |
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ADDsA_E = 10'h83,// ADD A,E ; 83
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| 219 |
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ADDsA_H = 10'h84,// ADD A,H ; 84
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| 220 |
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ADDsA_L = 10'h85,// ADD A,L ; 85
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| 221 |
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ADDsA_6HL7 = 10'h86,// ADD A,(HL) ; 86
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| 222 |
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ADDsA_A = 10'h87,// ADD A,A ; 87
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| 223 |
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ADCsA_B = 10'h88,// ADC A,B ; 88
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| 224 |
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ADCsA_C = 10'h89,// ADC A,C ; 89
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| 225 |
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ADCsA_D = 10'h8A,// ADC A,D ; 8A
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| 226 |
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ADCsA_E = 10'h8B,// ADC A,E ; 8B
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| 227 |
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ADCsA_H = 10'h8C,// ADC A,H ; 8C
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| 228 |
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ADCsA_L = 10'h8D,// ADC A,L ; 8D
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| 229 |
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ADCsA_6HL7 = 10'h8E,// ADC A,(HL) ; 8E
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| 230 |
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ADCsA_A = 10'h8F,// ADC A,A ; 8F
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| 231 |
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SUBsB = 10'h90,// SUB B ; 90
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| 232 |
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SUBsC = 10'h91,// SUB C ; 91
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| 233 |
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SUBsD = 10'h92,// SUB D ; 92
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| 234 |
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SUBsE = 10'h93,// SUB E ; 93
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| 235 |
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SUBsH = 10'h94,// SUB H ; 94
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| 236 |
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SUBsL = 10'h95,// SUB L ; 95
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| 237 |
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SUBs6HL7 = 10'h96,// SUB (HL) ; 96
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| 238 |
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SUBsA = 10'h97,// SUB A ; 97
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| 239 |
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SBCsB = 10'h98,// SBC B ; 98
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| 240 |
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SBCsC = 10'h99,// SBC C ; 99
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| 241 |
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SBCsD = 10'h9A,// SBC D ; 9A
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| 242 |
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SBCsE = 10'h9B,// SBC E ; 9B
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| 243 |
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SBCsH = 10'h9C,// SBC H ; 9C
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| 244 |
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SBCsL = 10'h9D,// SBC L ; 9D
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| 245 |
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SBCs6HL7 = 10'h9E,// SBC (HL) ; 9E
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| 246 |
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SBCsA = 10'h9F,// SBC A ; 9F
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| 247 |
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ANDsB = 10'hA0,// AND B ; A0
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| 248 |
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ANDsC = 10'hA1,// AND C ; A1
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| 249 |
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ANDsD = 10'hA2,// AND D ; A2
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| 250 |
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ANDsE = 10'hA3,// AND E ; A3
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| 251 |
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ANDsH = 10'hA4,// AND H ; A4
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| 252 |
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ANDsL = 10'hA5,// AND L ; A5
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| 253 |
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ANDs6HL7 = 10'hA6,// AND (HL) ; A6
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| 254 |
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ANDsA = 10'hA7,// AND A ; A7
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| 255 |
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XORsB = 10'hA8,// XOR B ; A8
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| 256 |
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XORsC = 10'hA9,// XOR C ; A9
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| 257 |
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XORsD = 10'hAA,// XOR D ; AA
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| 258 |
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XORsE = 10'hAB,// XOR E ; AB
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| 259 |
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XORsH = 10'hAC,// XOR H ; AC
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| 260 |
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XORsL = 10'hAD,// XOR L ; AD
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| 261 |
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XORs6HL7 = 10'hAE,// XOR (HL) ; AE
|
| 262 |
|
|
XORsA = 10'hAF,// XOR A ; AF
|
| 263 |
|
|
ORsB = 10'hB0,// OR B ; B0
|
| 264 |
|
|
ORsC = 10'hB1,// OR C ; B1
|
| 265 |
|
|
ORsD = 10'hB2,// OR D ; B2
|
| 266 |
|
|
ORsE = 10'hB3,// OR E ; B3
|
| 267 |
|
|
ORsH = 10'hB4,// OR H ; B4
|
| 268 |
|
|
ORsL = 10'hB5,// OR L ; B5
|
| 269 |
|
|
ORs6HL7 = 10'hB6,// OR (HL) ; B6
|
| 270 |
|
|
ORsA = 10'hB7,// OR A ; B7
|
| 271 |
|
|
CPsB = 10'hB8,// CP B ; B8
|
| 272 |
|
|
CPsC = 10'hB9,// CP C ; B9
|
| 273 |
|
|
CPsD = 10'hBA,// CP D ; BA
|
| 274 |
|
|
CPsE = 10'hBB,// CP E ; BB
|
| 275 |
|
|
CPsH = 10'hBC,// CP H ; BC
|
| 276 |
|
|
CPsL = 10'hBD,// CP L ; BD
|
| 277 |
|
|
CPs6HL7 = 10'hBE,// CP (HL) ; BE
|
| 278 |
|
|
CPsA = 10'hBF,// CP A ; BF
|
| 279 |
|
|
RETsNZ = 10'hC0,// RET NZ ; C0
|
| 280 |
|
|
POPsBC = 10'hC1,// POP BC ; C1
|
| 281 |
|
|
JPsNZ = 10'hC2,// JP NZ ; C2 XX XX
|
| 282 |
|
|
JP = 10'hC3,// JP ; C3 XX XX
|
| 283 |
|
|
CALLsNZ_NN = 10'hC4,// CALL NZ,NN ; C4 XX XX
|
| 284 |
|
|
PUSHsBC = 10'hC5,// PUSH BC ; C5
|
| 285 |
|
|
ADDsA_N = 10'hC6,// ADD A,N ; C6 XX
|
| 286 |
|
|
RSTs0 = 10'hC7,// RST 0 ; C7
|
| 287 |
|
|
RETsZ = 10'hC8,// RET Z ; C8
|
| 288 |
|
|
RET = 10'hC9,// RET ; C9
|
| 289 |
|
|
JPsZ = 10'hCA,// JP Z ; CA XX XX
|
| 290 |
|
|
CALLsZ_NN = 10'hCC,// CALL Z,NN ; CC XX XX
|
| 291 |
|
|
CBgrp = 10'hCB,// CBgrp is rotates and bit munging below
|
| 292 |
|
|
CALLsNN = 10'hCD,// CALL NN ; CD XX XX
|
| 293 |
|
|
ADCsA_N = 10'hCE,// ADC A,N ; CE XX
|
| 294 |
|
|
RSTs8H = 10'hCF,// RST 8H ; CF
|
| 295 |
|
|
RETsNC = 10'hD0,// RET NC ; D0
|
| 296 |
|
|
POPsDE = 10'hD1,// POP DE ; D1
|
| 297 |
|
|
JPsNC = 10'hD2,// JP NC, ; D2 XX XX
|
| 298 |
|
|
OUTs6N7_A = 10'hD3,// OUT (N),A ; D3 XX
|
| 299 |
|
|
CALLsNC_NN = 10'hD4,// CALL NC,NN ; D4 XX XX
|
| 300 |
|
|
PUSHsDE = 10'hD5,// PUSH DE ; D5
|
| 301 |
|
|
SUBsN = 10'hD6,// SUB N ; D6 XX
|
| 302 |
|
|
RSTs10H = 10'hD7,// RST 10H ; D7
|
| 303 |
|
|
RETsC = 10'hD8,// RET C ; D8
|
| 304 |
|
|
EXX = 10'hD9,// EXX ; D9
|
| 305 |
|
|
JPsC = 10'hDA,// JP C ; DA XX XX
|
| 306 |
|
|
INsA_6N7 = 10'hDB,// IN A,(N) ; DB XX
|
| 307 |
|
|
CALLsC_NN = 10'hDC,// CALL C,NN ; DC XX XX
|
| 308 |
|
|
DDgrp = 10'hDD,// DDgrp
|
| 309 |
|
|
SBCsA_N = 10'hDE,// SBC A,N ; DE XX
|
| 310 |
|
|
RSTs18H = 10'hDF,// RST 18H ; DF
|
| 311 |
|
|
RETsPO = 10'hE0,// RET PO ; E0
|
| 312 |
|
|
POPsHL = 10'hE1,// POP HL ; E1
|
| 313 |
|
|
JPsPO = 10'hE2,// JP PO ; E2 XX XX
|
| 314 |
|
|
EXs6SP7_HL = 10'hE3,// EX (SP),HL ; E3
|
| 315 |
|
|
CALLsPO_NN = 10'hE4,// CALL PO,NN ; E4 XX XX
|
| 316 |
|
|
PUSHsHL = 10'hE5,// PUSH HL ; E5
|
| 317 |
|
|
ANDsN = 10'hE6,// AND N ; E6 XX
|
| 318 |
|
|
RSTs20H = 10'hE7,// RST 20H ; E7
|
| 319 |
|
|
RETsPE = 10'hE8,// RET PE ; E8
|
| 320 |
|
|
JPsHL = 10'hE9,// JP HL ; E9 // documented as indirect IS NOT
|
| 321 |
|
|
JPsPE = 10'hEA,// JP PE, ; EA XX XX
|
| 322 |
|
|
EXsDE_HL = 10'hEB,// EX DE,HL ; EB
|
| 323 |
|
|
CALLsPE_NN = 10'hEC,// CALL PE,NN ; EC XX XX
|
| 324 |
|
|
EDgrp = 10'hED,// EDgrp ED
|
| 325 |
|
|
XORsN = 10'hEE,// XOR N ; EE XX
|
| 326 |
|
|
RSTs28H = 10'hEF,// RST 28H ; EF
|
| 327 |
|
|
RETsP = 10'hF0,// RET P ; F0
|
| 328 |
|
|
POPsAF = 10'hF1,// POP AF ; F1
|
| 329 |
|
|
JPsP = 10'hF2,// JP P ; F2 XX XX
|
| 330 |
|
|
DI = 10'hF3,// DI ; F3
|
| 331 |
|
|
CALLsP_NN = 10'hF4,// CALL P,NN ; F4 XX XX
|
| 332 |
|
|
PUSHsAF = 10'hF5,// PUSH AF ; F5
|
| 333 |
|
|
ORsN = 10'hF6,// OR N ; F6 XX
|
| 334 |
|
|
RSTs30H = 10'hF7,// RST 30H ; F7
|
| 335 |
|
|
RETsM = 10'hF8,// RET M ; F8
|
| 336 |
|
|
LDsSP_HL = 10'hF9,// LD SP,HL ; F9
|
| 337 |
|
|
JPsM = 10'hFA,// JP M, ; FA XX XX
|
| 338 |
|
|
EI = 10'hFB,// EI ; FB
|
| 339 |
|
|
CALLsM_NN = 10'hFC,// CALL M,NN ; FC XX XX
|
| 340 |
|
|
FDgrp = 10'hFD,// FDgrp FD
|
| 341 |
|
|
CPsN = 10'hFE,// CP N ; FE XX
|
| 342 |
|
|
RSTs38H = 10'hFF,// RST 38H ; FF
|
| 343 |
|
|
|
| 344 |
|
|
// the CB set
|
| 345 |
|
|
// These have enough structure that I don't believe I will define a parameter for each
|
| 346 |
|
|
// First cut below
|
| 347 |
|
|
CB_RLC = 7'b01_00_000, // these must be compaired with ir[9:3]
|
| 348 |
|
|
CB_RRC = 7'b01_00_001, // these must be compaired with ir[9:3]
|
| 349 |
|
|
CB_RL = 7'b01_00_010, // these must be compaired with ir[9:3]
|
| 350 |
|
|
CB_RR = 7'b01_00_011, // these must be compaired with ir[9:3]
|
| 351 |
|
|
CB_SLA = 7'b01_00_100, // these must be compaired with ir[9:3]
|
| 352 |
|
|
CB_SRA = 7'b01_00_101, // these must be compaired with ir[9:3]
|
| 353 |
|
|
CB_SLL = 7'b01_00_110, // these must be compaired with ir[9:3]
|
| 354 |
|
|
CB_SRL = 7'b01_00_111, // these must be compaired with ir[9:3]
|
| 355 |
|
|
|
| 356 |
|
|
CB_BIT = 4'b01_01, // these must be compaired with ir[9:6]
|
| 357 |
|
|
CB_RES = 4'b01_10, // these must be compaired with ir[9:6]
|
| 358 |
|
|
CB_SET = 4'b01_11, // these must be compaired with ir[9:6]
|
| 359 |
|
|
|
| 360 |
|
|
CB_MEM = 3'b110, // this must be compaired with ir[2:0]
|
| 361 |
|
|
// note these are all read-modify-writ except CB_BIT
|
| 362 |
|
|
|
| 363 |
|
|
// The ED Group
|
| 364 |
|
|
// These are the "unique instructions in the 46, 47 rows that NEED? to be implemented
|
| 365 |
|
|
// Not sure I want to worry about all undocumented stuff in these rows - hard to believe
|
| 366 |
|
|
// It will matter.(IM modes are very system dependent - hard to believe even a programmer
|
| 367 |
|
|
// would use undocumented instructions to muck with this stuff)
|
| 368 |
|
|
ED_IMs0 = 10'h246, // IM 0 ; ED 46 set IM0
|
| 369 |
|
|
ED_LDsI_A = 10'h247, // LD I,A ; ED 47 move a to I
|
| 370 |
|
|
ED_IMs1 = 10'h256, // IM 1 ; ED 56 set IM1
|
| 371 |
|
|
ED_LDsA_I = 10'h257, // LD A,I ; ED 57 move I to A
|
| 372 |
|
|
ED_IMs2 = 10'h25E, // IM 2 ; ED 5E set IM2
|
| 373 |
|
|
ED_RRD = 10'h267, // RRD ; ED 67 nibble roates A HL
|
| 374 |
|
|
ED_RLD = 10'h26F, // RLD ; ED 6F nibble roates A HL
|
| 375 |
|
|
|
| 376 |
|
|
|
| 377 |
|
|
ED_LDI = 10'h2A0, // LDI ; ED A0 These are block move
|
| 378 |
|
|
ED_CPI = 10'h2A1, // CPI ; ED A1 type insts that don't repeat
|
| 379 |
|
|
ED_INI = 10'h2A2, // INI ; ED A2
|
| 380 |
|
|
ED_OUTI = 10'h2A3, // OUTI ; ED A3
|
| 381 |
|
|
ED_LDD = 10'h2A8, // LDD ; ED A8
|
| 382 |
|
|
ED_CPD = 10'h2A9, // CPD ; ED A9
|
| 383 |
|
|
ED_IND = 10'h2AA, // IND ; ED AA
|
| 384 |
|
|
ED_OUTD = 10'h2AB, // OUTD ; ED AB
|
| 385 |
|
|
ED_LDIR = 10'h2B0, // LDIR ; ED B0 These are block move
|
| 386 |
|
|
ED_CPIR = 10'h2B1, // CPIR ; ED B1 type insts that DO repeat
|
| 387 |
|
|
ED_INIR = 10'h2B2, // INIR ; ED B2
|
| 388 |
|
|
ED_OTIR = 10'h2B3, // OTIR ; ED B3
|
| 389 |
|
|
ED_LDDR = 10'h2B8, // LDDR ; ED B8
|
| 390 |
|
|
ED_CPDR = 10'h2B9, // CPDR ; ED B9
|
| 391 |
|
|
ED_INDR = 10'h2BA, // INDR ; ED BA
|
| 392 |
|
|
ED_OTDR = 10'h2BB, // OTDR ; ED BB
|
| 393 |
|
|
|
| 394 |
|
|
// the ED gropu definitions from 40 to 7f from document on undocumented insts.....
|
| 395 |
|
|
//
|
| 396 |
|
|
// ED40 IN B,(C) ED50 IN D,(C) ED60 IN H,(C) ED70 IN (C) / IN F,(C)
|
| 397 |
|
|
// ED41 OUT (C),B ED51 OUT (C),D ED61 OUT (C),H ED71 OUT (C),0*
|
| 398 |
|
|
// ED42 SBC HL,BC ED52 SBC HL,DE ED62 SBC HL,HL ED72 SBC HL,SP
|
| 399 |
|
|
// ED43 LD (nn),BC ED53 LD (nn),DE ED63 LD (nn),HL ED73 LD (nn),SP
|
| 400 |
|
|
// ED44 NEG ED54 NEG* ED64 NEG* ED74 NEG*
|
| 401 |
|
|
// ED45 RETN ED55 RETN* ED65 RETN* ED75 RETN*
|
| 402 |
|
|
// ED46 IM 0 ED56 IM 1 ED66 IM 0* ED76 IM 1*
|
| 403 |
|
|
// ED47 LD I,A ED57 LD A,I ED67 RRD ED77 NOP*
|
| 404 |
|
|
|
| 405 |
|
|
// ED48 IN C,(C) ED58 IN E,(C) ED68 IN L,(C) ED78 IN A,(C)
|
| 406 |
|
|
// ED49 OUT (C),C ED59 OUT (C),E ED69 OUT (C),L ED79 OUT (C),A
|
| 407 |
|
|
// ED4A ADC HL,BC ED5A ADC HL,DE ED6A ADC HL,HL ED7A ADC HL,SP
|
| 408 |
|
|
// ED4B LD BC,(nn) ED5B LD DE,(nn) ED6B LD HL,(nn) ED7B LD SP,(nn)
|
| 409 |
|
|
// ED4C NEG* ED5C NEG* ED6C NEG* ED7C NEG*
|
| 410 |
|
|
// ED4D RETI ED5D RETN* ED6D RETN* ED7D RETN*
|
| 411 |
|
|
// ED4E IM 0* ED5E IM 2 ED6E IM 0* ED7E IM 2*
|
| 412 |
|
|
// ED4F LD R,A ED5F LD A,R ED6F RLD ED7F NOP*
|
| 413 |
|
|
|
| 414 |
|
|
|
| 415 |
|
|
//The ED70 instruction reads from I/O port C,
|
| 416 |
|
|
//but does not store the result.
|
| 417 |
|
|
//It just affects the flags. Hard to test. like the other IN x,(C) instruction.
|
| 418 |
|
|
//
|
| 419 |
|
|
//ED71 simply outs the value 0 to I/O port C.
|
| 420 |
|
|
// This suggests that we should decode as follows:
|
| 421 |
|
|
// I hope if I don't get all the IM duplicates right it won't be a tragedy
|
| 422 |
|
|
ED_INsREG_6C7 = 7'b1001___000, // compair with {ir[9:6],ir[2:0]}
|
| 423 |
|
|
ED_OUTs6C7_REG = 7'b1001___001, // compair with {ir[9:6],ir[2:0]}
|
| 424 |
|
|
ED_SBCsHL_REG = 8'b1001__0010, // compair with {ir[9:6],ir[3:0]}
|
| 425 |
|
|
ED_ADCsHL_REG = 8'b1001__1010, // compair with {ir[9:6],ir[3:0]}
|
| 426 |
|
|
ED_LDs6NN7_REG = 8'b1001__0011, // compair with {ir[9:6],ir[3:0]} REG = BC,DE,HL,SP
|
| 427 |
|
|
ED_LDsREG_6NN7 = 8'b1001__1011, // compair with {ir[9:6],ir[3:0]} REG = BC,DE,HL,SP
|
| 428 |
|
|
ED_NEG = 7'b1001___100, // compair with {ir[9:6],ir[2:0]} all A<= -A
|
| 429 |
|
|
ED_RETN = 7'b1001___101, // compair with {ir[9:6],ir[2:0]} and !reti
|
| 430 |
|
|
|
| 431 |
|
|
DBL_REG_BC = 2'b00, // compair with ir[5:4]
|
| 432 |
25 |
bporcella |
DBL_REG_DE = 2'b01, // compair with ir[5:4]
|
| 433 |
|
|
DBL_REG_HL = 2'b10, // compair with ir[5:4]
|
| 434 |
|
|
DBL_REG_SP = 2'b11, // compair with ir[5:4]
|
| 435 |
10 |
bporcella |
|
| 436 |
|
|
REG8_B = 3'b000,
|
| 437 |
|
|
REG8_C = 3'b001,
|
| 438 |
|
|
REG8_D = 3'b010,
|
| 439 |
|
|
REG8_E = 3'b011,
|
| 440 |
|
|
REG8_H = 3'b100,
|
| 441 |
|
|
REG8_L = 3'b101,
|
| 442 |
|
|
REG8_MEM = 3'b110,
|
| 443 |
|
|
REG8_A = 3'b111;
|
| 444 |
|
|
|
| 445 |
|
|
|
| 446 |
|
|
|
| 447 |
|
|
|
| 448 |
|
|
|
| 449 |
|
|
|
| 450 |
|
|
|
| 451 |
|
|
|
| 452 |
|
|
|
| 453 |
|
|
|
| 454 |
|
|
|
| 455 |
|
|
|
| 456 |
|
|
|
| 457 |
|
|
|
| 458 |
|
|
|
| 459 |
|
|
|
| 460 |
|
|
|
| 461 |
|
|
|
| 462 |
|
|
|
| 463 |
|
|
|
| 464 |
|
|
|
| 465 |
|
|
|
| 466 |
|
|
|
| 467 |
|
|
|
| 468 |
|
|
|
| 469 |
|
|
|
| 470 |
|
|
|
| 471 |
|
|
|
| 472 |
|
|
|
| 473 |
|
|
|
| 474 |
|
|
|
| 475 |
|
|
|
| 476 |
|
|
|
| 477 |
|
|
|
| 478 |
|
|
|
| 479 |
|
|
|
| 480 |
|
|
|
| 481 |
|
|
|
| 482 |
|
|
|
| 483 |
|
|
|
| 484 |
|
|
|
| 485 |
|
|
|
| 486 |
|
|
|
| 487 |
|
|
|
| 488 |
|
|
|
| 489 |
|
|
|
| 490 |
|
|
|
| 491 |
|
|
|
| 492 |
|
|
|
| 493 |
|
|
|
| 494 |
|
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|
