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- /*
- * Z80SIM - a Z80-CPU simulator
- *
- * Copyright (C) 1987-92 by Udo Munk
- *
- * This module of the Z80-CPU simulator must not be modified by a user,
- * see license agreement!
- *
- * History:
- * 28-SEP-87 Development on TARGON/35 with AT&T Unix System V.3
- * 11-JAN-89 Release 1.1
- * 08-FEB-89 Release 1.2
- * 13-MAR-89 Release 1.3
- * 09-FEB-90 Release 1.4 Ported to TARGON/31 M10/30
- * 20-DEC-90 Release 1.5 Ported to COHERENT 3.0
- * 10-JUN-92 Release 1.6 long casting problem solved with COHERENT 3.2
- * and some optimization
- * 25-JUN-92 Release 1.7 comments in english
- */
-
- /*
- * Like the function "cpu()" this one emulates multi byte opcodes
- * starting with 0xed
- */
-
- #include "sim.h"
- #include "simglb.h"
-
- long op_ed_handel()
- {
- long trap_ed();
- long op_im0(), op_im1(), op_im2();
- long op_reti(), op_retn();
- long op_neg();
- long op_inaic(), op_inbic(), op_incic(), op_indic(), op_ineic();
- long op_inhic(), op_inlic();
- long op_outca(), op_outcb(), op_outcc(), op_outcd(), op_outce();
- long op_outch(), op_outcl();
- long op_ini(), op_inir(), op_ind(), op_indr();
- long op_outi(), op_otir(), op_outd(), op_otdr();
- long op_ldai(), op_ldar(), op_ldia(), op_ldra();
- long op_ldbcinn(), op_lddeinn(), op_ldspinn();
- long op_ldinbc(), op_ldinde(), op_ldinsp();
- long op_adchb(), op_adchd(), op_adchh(), op_adchs();
- long op_sbchb(), op_sbchd(), op_sbchh(), op_sbchs();
- long op_ldi(), op_ldir(), op_ldd(), op_lddr();
- long op_cpi(), op_cpir(), op_cpdop(), op_cpdr();
- long op_oprld(), op_oprrd();
-
- static long (*op_ed[256]) () = {
- trap_ed, /* 0x00 */
- trap_ed, /* 0x01 */
- trap_ed, /* 0x02 */
- trap_ed, /* 0x03 */
- trap_ed, /* 0x04 */
- trap_ed, /* 0x05 */
- trap_ed, /* 0x06 */
- trap_ed, /* 0x07 */
- trap_ed, /* 0x08 */
- trap_ed, /* 0x09 */
- trap_ed, /* 0x0a */
- trap_ed, /* 0x0b */
- trap_ed, /* 0x0c */
- trap_ed, /* 0x0d */
- trap_ed, /* 0x0e */
- trap_ed, /* 0x0f */
- trap_ed, /* 0x10 */
- trap_ed, /* 0x11 */
- trap_ed, /* 0x12 */
- trap_ed, /* 0x13 */
- trap_ed, /* 0x14 */
- trap_ed, /* 0x15 */
- trap_ed, /* 0x16 */
- trap_ed, /* 0x17 */
- trap_ed, /* 0x18 */
- trap_ed, /* 0x19 */
- trap_ed, /* 0x1a */
- trap_ed, /* 0x1b */
- trap_ed, /* 0x1c */
- trap_ed, /* 0x1d */
- trap_ed, /* 0x1e */
- trap_ed, /* 0x1f */
- trap_ed, /* 0x20 */
- trap_ed, /* 0x21 */
- trap_ed, /* 0x22 */
- trap_ed, /* 0x23 */
- trap_ed, /* 0x24 */
- trap_ed, /* 0x25 */
- trap_ed, /* 0x26 */
- trap_ed, /* 0x27 */
- trap_ed, /* 0x28 */
- trap_ed, /* 0x29 */
- trap_ed, /* 0x2a */
- trap_ed, /* 0x2b */
- trap_ed, /* 0x2c */
- trap_ed, /* 0x2d */
- trap_ed, /* 0x2e */
- trap_ed, /* 0x2f */
- trap_ed, /* 0x30 */
- trap_ed, /* 0x31 */
- trap_ed, /* 0x32 */
- trap_ed, /* 0x33 */
- trap_ed, /* 0x34 */
- trap_ed, /* 0x35 */
- trap_ed, /* 0x36 */
- trap_ed, /* 0x37 */
- trap_ed, /* 0x38 */
- trap_ed, /* 0x39 */
- trap_ed, /* 0x3a */
- trap_ed, /* 0x3b */
- trap_ed, /* 0x3c */
- trap_ed, /* 0x3d */
- trap_ed, /* 0x3e */
- trap_ed, /* 0x3f */
- op_inbic, /* 0x40 */
- op_outcb, /* 0x41 */
- op_sbchb, /* 0x42 */
- op_ldinbc, /* 0x43 */
- op_neg, /* 0x44 */
- op_retn, /* 0x45 */
- op_im0, /* 0x46 */
- op_ldia, /* 0x47 */
- op_incic, /* 0x48 */
- op_outcc, /* 0x49 */
- op_adchb, /* 0x4a */
- op_ldbcinn, /* 0x4b */
- trap_ed, /* 0x4c */
- op_reti, /* 0x4d */
- trap_ed, /* 0x4e */
- op_ldra, /* 0x4f */
- op_indic, /* 0x50 */
- op_outcd, /* 0x51 */
- op_sbchd, /* 0x52 */
- op_ldinde, /* 0x53 */
- trap_ed, /* 0x54 */
- trap_ed, /* 0x55 */
- op_im1, /* 0x56 */
- op_ldai, /* 0x57 */
- op_ineic, /* 0x58 */
- op_outce, /* 0x59 */
- op_adchd, /* 0x5a */
- op_lddeinn, /* 0x5b */
- trap_ed, /* 0x5c */
- trap_ed, /* 0x5d */
- op_im2, /* 0x5e */
- op_ldar, /* 0x5f */
- op_inhic, /* 0x60 */
- op_outch, /* 0x61 */
- op_sbchh, /* 0x62 */
- trap_ed, /* 0x63 */
- trap_ed, /* 0x64 */
- trap_ed, /* 0x65 */
- trap_ed, /* 0x66 */
- op_oprrd, /* 0x67 */
- op_inlic, /* 0x68 */
- op_outcl, /* 0x69 */
- op_adchh, /* 0x6a */
- trap_ed, /* 0x6b */
- trap_ed, /* 0x6c */
- trap_ed, /* 0x6d */
- trap_ed, /* 0x6e */
- op_oprld, /* 0x6f */
- trap_ed, /* 0x70 */
- trap_ed, /* 0x71 */
- op_sbchs, /* 0x72 */
- op_ldinsp, /* 0x73 */
- trap_ed, /* 0x74 */
- trap_ed, /* 0x75 */
- trap_ed, /* 0x76 */
- trap_ed, /* 0x77 */
- op_inaic, /* 0x78 */
- op_outca, /* 0x79 */
- op_adchs, /* 0x7a */
- op_ldspinn, /* 0x7b */
- trap_ed, /* 0x7c */
- trap_ed, /* 0x7d */
- trap_ed, /* 0x7e */
- trap_ed, /* 0x7f */
- trap_ed, /* 0x80 */
- trap_ed, /* 0x81 */
- trap_ed, /* 0x82 */
- trap_ed, /* 0x83 */
- trap_ed, /* 0x84 */
- trap_ed, /* 0x85 */
- trap_ed, /* 0x86 */
- trap_ed, /* 0x87 */
- trap_ed, /* 0x88 */
- trap_ed, /* 0x89 */
- trap_ed, /* 0x8a */
- trap_ed, /* 0x8b */
- trap_ed, /* 0x8c */
- trap_ed, /* 0x8d */
- trap_ed, /* 0x8e */
- trap_ed, /* 0x8f */
- trap_ed, /* 0x90 */
- trap_ed, /* 0x91 */
- trap_ed, /* 0x92 */
- trap_ed, /* 0x93 */
- trap_ed, /* 0x94 */
- trap_ed, /* 0x95 */
- trap_ed, /* 0x96 */
- trap_ed, /* 0x97 */
- trap_ed, /* 0x98 */
- trap_ed, /* 0x99 */
- trap_ed, /* 0x9a */
- trap_ed, /* 0x9b */
- trap_ed, /* 0x9c */
- trap_ed, /* 0x9d */
- trap_ed, /* 0x9e */
- trap_ed, /* 0x9f */
- op_ldi, /* 0xa0 */
- op_cpi, /* 0xa1 */
- op_ini, /* 0xa2 */
- op_outi, /* 0xa3 */
- trap_ed, /* 0xa4 */
- trap_ed, /* 0xa5 */
- trap_ed, /* 0xa6 */
- trap_ed, /* 0xa7 */
- op_ldd, /* 0xa8 */
- op_cpdop, /* 0xa9 */
- op_ind, /* 0xaa */
- op_outd, /* 0xab */
- trap_ed, /* 0xac */
- trap_ed, /* 0xad */
- trap_ed, /* 0xae */
- trap_ed, /* 0xaf */
- op_ldir, /* 0xb0 */
- op_cpir, /* 0xb1 */
- op_inir, /* 0xb2 */
- op_otir, /* 0xb3 */
- trap_ed, /* 0xb4 */
- trap_ed, /* 0xb5 */
- trap_ed, /* 0xb6 */
- trap_ed, /* 0xb7 */
- op_lddr, /* 0xb8 */
- op_cpdr, /* 0xb9 */
- op_indr, /* 0xba */
- op_otdr, /* 0xbb */
- trap_ed, /* 0xbc */
- trap_ed, /* 0xbd */
- trap_ed, /* 0xbe */
- trap_ed, /* 0xbf */
- trap_ed, /* 0xc0 */
- trap_ed, /* 0xc1 */
- trap_ed, /* 0xc2 */
- trap_ed, /* 0xc3 */
- trap_ed, /* 0xc4 */
- trap_ed, /* 0xc5 */
- trap_ed, /* 0xc6 */
- trap_ed, /* 0xc7 */
- trap_ed, /* 0xc8 */
- trap_ed, /* 0xc9 */
- trap_ed, /* 0xca */
- trap_ed, /* 0xcb */
- trap_ed, /* 0xcc */
- trap_ed, /* 0xcd */
- trap_ed, /* 0xce */
- trap_ed, /* 0xcf */
- trap_ed, /* 0xd0 */
- trap_ed, /* 0xd1 */
- trap_ed, /* 0xd2 */
- trap_ed, /* 0xd3 */
- trap_ed, /* 0xd4 */
- trap_ed, /* 0xd5 */
- trap_ed, /* 0xd6 */
- trap_ed, /* 0xd7 */
- trap_ed, /* 0xd8 */
- trap_ed, /* 0xd9 */
- trap_ed, /* 0xda */
- trap_ed, /* 0xdb */
- trap_ed, /* 0xdc */
- trap_ed, /* 0xdd */
- trap_ed, /* 0xde */
- trap_ed, /* 0xdf */
- trap_ed, /* 0xe0 */
- trap_ed, /* 0xe1 */
- trap_ed, /* 0xe2 */
- trap_ed, /* 0xe3 */
- trap_ed, /* 0xe4 */
- trap_ed, /* 0xe5 */
- trap_ed, /* 0xe6 */
- trap_ed, /* 0xe7 */
- trap_ed, /* 0xe8 */
- trap_ed, /* 0xe9 */
- trap_ed, /* 0xea */
- trap_ed, /* 0xeb */
- trap_ed, /* 0xec */
- trap_ed, /* 0xed */
- trap_ed, /* 0xee */
- trap_ed, /* 0xef */
- trap_ed, /* 0xf0 */
- trap_ed, /* 0xf1 */
- trap_ed, /* 0xf2 */
- trap_ed, /* 0xf3 */
- trap_ed, /* 0xf4 */
- trap_ed, /* 0xf5 */
- trap_ed, /* 0xf6 */
- trap_ed, /* 0xf7 */
- trap_ed, /* 0xf8 */
- trap_ed, /* 0xf9 */
- trap_ed, /* 0xfa */
- trap_ed, /* 0xfb */
- trap_ed, /* 0xfc */
- trap_ed, /* 0xfd */
- trap_ed, /* 0xfe */
- trap_ed /* 0xff */
- };
-
- #ifdef WANT_TIM
- register long t;
- t = (*op_ed[*PC++]) (); /* execute next opcode */
- #else
- (*op_ed[*PC++]) ();
- #endif
-
- #ifdef WANT_PCC
- if (PC > ram + 65535) /* correct PC overrun */
- PC = ram;
- #endif
-
- #ifdef WANT_TIM
- return(t);
- #endif
- }
-
- /*
- * This function traps all illegal opcodes following the
- * initial 0xed of a multi byte opcode.
- */
- static long trap_ed()
- {
- cpu_error = OPTRAP2;
- cpu_state = STOPPED;
- #ifdef WANT_TIM
- return(0L);
- #endif
- }
-
- static long op_im0() /* IM 0 */
- {
- int_mode = 0;
- #ifdef WANT_TIM
- return(8L);
- #endif
- }
-
- static long op_im1() /* IM 1 */
- {
- int_mode = 1;
- #ifdef WANT_TIM
- return(8L);
- #endif
- }
-
- static long op_im2() /* IM 2 */
- {
- int_mode = 2;
- #ifdef WANT_TIM
- return(8L);
- #endif
- }
-
- static long op_reti() /* RETI */
- {
- register unsigned i;
-
- i = *STACK++;
- #ifdef WANT_SPC
- if (STACK >= ram + 65536L)
- STACK = ram;
- #endif
- i += *STACK++ << 8;
- #ifdef WANT_SPC
- if (STACK >= ram + 65536L)
- STACK = ram;
- #endif
- PC = ram + i;
- #ifdef WANT_TIM
- return(14L);
- #endif
- }
-
- static long op_retn() /* RETN */
- {
- register unsigned i;
-
- i = *STACK++;
- #ifdef WANT_SPC
- if (STACK >= ram + 65536L)
- STACK = ram;
- #endif
- i += *STACK++ << 8;
- #ifdef WANT_SPC
- if (STACK >= ram + 65536L)
- STACK = ram;
- #endif
- PC = ram + i;
- (IFF & 2) ? (IFF |= 1) : (IFF &= ~1);
- #ifdef WANT_TIM
- return(14L);
- #endif
- }
-
- static long op_neg() /* NEG */
- {
- (A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (A == 0x80) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (0 - ((char) A & 0xf) < 0) ? (F |= H_FLAG) : (F &= ~H_FLAG);
- A = 0 - A;
- F |= N_FLAG;
- (A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(8L);
- #endif
- }
-
- static long op_inaic() /* IN A,(C) */
- {
- BYTE io_in();
-
- A = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[A]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_inbic() /* IN B,(C) */
- {
- BYTE io_in();
-
- B = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (B) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (B & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[B]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_incic() /* IN C,(C) */
- {
- BYTE io_in();
-
- C = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (C) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (C & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[C]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_indic() /* IN D,(C) */
- {
- BYTE io_in();
-
- D = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (D) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (D & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[D]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_ineic() /* IN E,(C) */
- {
- BYTE io_in();
-
- E = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (E) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (E & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[E]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_inhic() /* IN H,(C) */
- {
- BYTE io_in();
-
- H = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (H) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[H]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_inlic() /* IN L,(C) */
- {
- BYTE io_in();
-
- L = io_in(C);
- F &= ~(N_FLAG | H_FLAG);
- (L) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (L & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[L]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outca() /* OUT (C),A */
- {
- BYTE io_out();
-
- io_out(C, A);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outcb() /* OUT (C),B */
- {
- BYTE io_out();
-
- io_out(C, B);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outcc() /* OUT (C),C */
- {
- BYTE io_out();
-
- io_out(C, C);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outcd() /* OUT (C),D */
- {
- BYTE io_out();
-
- io_out(C, D);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outce() /* OUT (C),E */
- {
- BYTE io_out();
-
- io_out(C, E);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outch() /* OUT (C),H */
- {
- BYTE io_out();
-
- io_out(C, H);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_outcl() /* OUT (C),L */
- {
- BYTE io_out();
-
- io_out(C, L);
- #ifdef WANT_TIM
- return(12L);
- #endif
- }
-
- static long op_ini() /* INI */
- {
- BYTE io_in();
-
- *(ram + (H << 8) + L) = io_in(C);
- L++;
- if (!L)
- H++;
- B--;
- F |= N_FLAG;
- (B) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_inir() /* INIR */
- {
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register BYTE *d;
- BYTE io_in();
-
- d = ram + (H << 8) + L;
- do {
- *d++ = io_in(C);
- B--;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (B);
- H = (d - ram) >> 8;
- L = d - ram;
- F |= N_FLAG | Z_FLAG;
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_ind() /* IND */
- {
- BYTE io_in();
-
- *(ram + (H << 8) + L) = io_in(C);
- L--;
- if (L == 0xff)
- H--;
- B--;
- F |= N_FLAG;
- (B) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_indr() /* INDR */
- {
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register BYTE *d;
- BYTE io_in();
-
- d = ram + (H << 8) + L;
- do {
- *d-- = io_in(C);
- B--;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (B);
- H = (d - ram) >> 8;
- L = d - ram;
- F |= N_FLAG | Z_FLAG;
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_outi() /* OUTI */
- {
- BYTE io_out();
-
- io_out(C, *(ram + (H << 8) * L));
- L++;
- if (!L)
- H++;
- B--;
- F |= N_FLAG;
- (B) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_otir() /* OTIR */
- {
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register BYTE *d;
- BYTE io_out();
-
- d = ram + (H << 8) + L;
- do {
- io_out(C, *d++);
- B--;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (B);
- H = (d - ram) >> 8;
- L = d - ram;
- F |= N_FLAG | Z_FLAG;
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_outd() /* OUTD */
- {
- BYTE io_out();
-
- io_out(C, *(ram + (H << 8) * L));
- L--;
- if (L == 0xff)
- H--;
- B--;
- F |= N_FLAG;
- (B) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_otdr() /* OTDR */
- {
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register BYTE *d;
- BYTE io_out();
-
- d = ram + (H << 8) + L;
- do {
- io_out(C, *d--);
- B--;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (B);
- H = (d - ram) >> 8;
- L = d - ram;
- F |= N_FLAG | Z_FLAG;
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_ldai() /* LD A,I */
- {
- A = I;
- F &= ~(N_FLAG | H_FLAG);
- (IFF & 2) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(9L);
- #endif
- }
-
- static long op_ldar() /* LD A,R */
- {
- A = (BYTE) R;
- F &= ~(N_FLAG | H_FLAG);
- (IFF & 2) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(9L);
- #endif
- }
-
- static long op_ldia() /* LD I,A */
- {
- I = A;
- #ifdef WANT_TIM
- return(9L);
- #endif
- }
-
- static long op_ldra() /* LD R,A */
- {
- R = A;
- #ifdef WANT_TIM
- return(9L);
- #endif
- }
-
- static long op_ldbcinn() /* LD BC,(nn) */
- {
- register BYTE *p;
-
- p = ram + *PC++;
- p += *PC++ << 8;
- C = *p++;
- B = *p;
- #ifdef WANT_TIM
- return(20L);
- #endif
- }
-
- static long op_lddeinn() /* LD DE,(nn) */
- {
- register BYTE *p;
-
- p = ram + *PC++;
- p += *PC++ << 8;
- E = *p++;
- D = *p;
- #ifdef WANT_TIM
- return(20L);
- #endif
- }
-
- static long op_ldspinn() /* LD SP,(nn) */
- {
- register BYTE *p;
-
- p = ram + *PC++;
- p += *PC++ << 8;
- STACK = ram + *p++;
- STACK += *p << 8;
- #ifdef WANT_TIM
- return(20L);
- #endif
- }
-
- static long op_ldinbc() /* LD (nn),BC */
- {
- register BYTE *p;
-
- p = ram + *PC++;
- p += *PC++ << 8;
- *p++ = C;
- *p = B;
- #ifdef WANT_TIM
- return(20L);
- #endif
- }
-
- static long op_ldinde() /* LD (nn),DE */
- {
- register BYTE *p;
-
- p = ram + *PC++;
- p += *PC++ << 8;
- *p++ = E;
- *p = D;
- #ifdef WANT_TIM
- return(20L);
- #endif
- }
-
- static long op_ldinsp() /* LD (nn),SP */
- {
- register BYTE *p;
- register int i;
-
- p = ram + *PC++;
- p += *PC++ << 8;
- i = STACK - ram;
- *p++ = i;
- *p = i >> 8;
- #ifdef WANT_TIM
- return(20L);
- #endif
- }
-
- static long op_adchb() /* ADC HL,BC */
- {
- register int carry;
- register WORD hl, bc;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- bc = (B << 8) + C;
- i = ((long)hl) + ((long)bc) + carry;
- ((hl < 0x8000) && (i > 0x7fffL)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i > 0xffffL) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F &= ~N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_adchd() /* ADC HL,DE */
- {
- register int carry;
- register WORD hl, de;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- de = (D << 8) + E;
- i = ((long)hl) + ((long)de) + carry;
- ((hl < 0x8000) && (i > 0x7fffL)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i > 0xffffL) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F &= ~N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_adchh() /* ADC HL,HL */
- {
- register int carry;
- register WORD hl;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- i = ((((long)hl) << 1) + carry);
- ((hl < 0x8000) && (i > 0x7fffL)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i > 0xffffL) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F &= ~N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_adchs() /* ADC HL,SP */
- {
- register int carry;
- register WORD hl, sp;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- sp = STACK - ram;
- i = ((long)hl) + ((long)sp) + carry;
- ((hl < 0x8000) && (i > 0x7fffL)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i > 0xffffL) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F &= ~N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_sbchb() /* SBC HL,BC */
- {
- register int carry;
- register WORD hl, bc;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- bc = (B << 8) + C;
- i = ((long)hl) - ((long)bc) - carry;
- ((hl > 0x7fff) && (i < 0x8000L)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i < 0L) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F |= N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_sbchd() /* SBC HL,DE */
- {
- register int carry;
- register WORD hl, de;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- de = (D << 8) + E;
- i = ((long)hl) - ((long)de) - carry;
- ((hl > 0x7fff) && (i < 0x8000L)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i < 0L) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F |= N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_sbchh() /* SBC HL,HL */
- {
- if (F & C_FLAG) {
- F |= S_FLAG | P_FLAG | N_FLAG | C_FLAG;
- F &= ~Z_FLAG;
- H = L = 255;
- } else {
- F |= Z_FLAG | N_FLAG;
- F &= ~(S_FLAG | P_FLAG | C_FLAG);
- H = L = 0;
- }
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_sbchs() /* SBC HL,SP */
- {
- register int carry;
- register WORD hl, sp;
- register long i;
-
- carry = (F & C_FLAG) ? 1 : 0;
- hl = (H << 8) + L;
- sp = STACK - ram;
- i = ((long)hl) - ((long)sp) - carry;
- ((hl > 0x7fff) && (i < 0x8000L)) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i < 0L) ? (F |= C_FLAG) : (F &= ~C_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- H = i >> 8;
- L = i;
- F |= N_FLAG;
- (H & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(15L);
- #endif
- }
-
- static long op_ldi() /* LDI */
- {
- *(ram + (D << 8) + E) = *(ram + (H << 8) + L);
- E++;
- if (!E)
- D++;
- L++;
- if (!L)
- H++;
- C--;
- if (C == 0xff)
- B--;
- (B | C) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- F &= ~(N_FLAG | H_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_ldir() /* LDIR */
- {
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register WORD i;
- register BYTE *s, *d;
-
- i = (B << 8) + C;
- d = ram + (D << 8) + E;
- s = ram + (H << 8) + L;
- do {
- *d++ = *s++;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (--i);
- B = C = 0;
- D = (d - ram) >> 8;
- E = d - ram;
- H = (s - ram) >> 8;
- L = s - ram;
- F &= ~(N_FLAG | P_FLAG | H_FLAG);
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_ldd() /* LDD */
- {
- *(ram + (D << 8) + E) = *(ram + (H << 8) + L);
- E--;
- if (E == 0xff)
- D--;
- L--;
- if (L == 0xff)
- H--;
- C--;
- if (C == 0xff)
- B--;
- (B | C) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- F &= ~(N_FLAG | H_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_lddr() /* LDDR */
- {
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register WORD i;
- register BYTE *s, *d;
-
- i = (B << 8) + C;
- d = ram + (D << 8) + E;
- s = ram + (H << 8) + L;
- do {
- *d-- = *s--;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (--i);
- B = C = 0;
- D = (d - ram) >> 8;
- E = d - ram;
- H = (s - ram) >> 8;
- L = s - ram;
- F &= ~(N_FLAG | P_FLAG | H_FLAG);
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_cpi() /* CPI */
- { /* H flag isn't set here ! */
- register BYTE i;
-
- i = A - *(ram + (H << 8) + L);
- L++;
- if (!L)
- H++;
- C--;
- if (C == 0xff)
- B--;
- F |= N_FLAG;
- (B | C) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_cpir() /* CPIR */
- { /* H flag isn't set here ! */
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register BYTE *s;
- register BYTE d;
- register WORD i;
-
- i = (B << 8) + C;
- s = ram + (H << 8) + L;
- do {
- d = A - *s++;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (--i && d);
- F |= N_FLAG;
- B = i >> 8;
- C = i;
- H = (s - ram) >> 8;
- L = s - ram;
- (i) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (d) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (d & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_cpdop() /* CPD */
- { /* H flag isn't set here ! */
- register BYTE i;
-
- i = A - *(ram + (H << 8) + L);
- L--;
- if (L == 0xff)
- H--;
- C--;
- if (C == 0xff)
- B--;
- F |= N_FLAG;
- (B | C) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(16L);
- #endif
- }
-
- static long op_cpdr() /* CPDR */
- { /* H flag isn't set here ! */
- #ifdef WANT_TIM
- register long t = -21L;
- #endif
- register BYTE *s;
- register BYTE d;
- register WORD i;
-
- i = (B << 8) + C;
- s = ram + (H << 8) + L;
- do {
- d = A - *s--;
- #ifdef WANT_TIM
- t += 21L;
- #endif
- } while (--i && d);
- F |= N_FLAG;
- B = i >> 8;
- C = i;
- H = (s - ram) >> 8;
- L = s - ram;
- (i) ? (F |= P_FLAG) : (F &= ~P_FLAG);
- (d) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (d & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- #ifdef WANT_TIM
- return(t + 16L);
- #endif
- }
-
- static long op_oprld() /* RLD (HL) */
- {
- register int i, j;
-
- i = *(ram + (H << 8) + L);
- j = A & 0x0f;
- A = (A & 0xf0) | (i >> 4);
- i = (i << 4) | j;
- *(ram + (H << 8) + L) = i;
- F &= ~(H_FLAG | N_FLAG);
- (A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[A]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(18L);
- #endif
- }
-
- static long op_oprrd() /* RRD (HL) */
- {
- register int i, j;
-
- i = *(ram + (H << 8) + L);
- j = A & 0x0f;
- A = (A & 0xf0) | (i & 0x0f);
- i = (i >> 4) | (j << 4);
- *(ram + (H << 8) + L) = i;
- F &= ~(H_FLAG | N_FLAG);
- (A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
- (A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
- (parrity[A]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
- #ifdef WANT_TIM
- return(18L);
- #endif
- }
-
-