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instr_dd.c
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instr_dd.c
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/*
* Z80SIM - a Z80-CPU simulator
*
* Copyright (C) 1987-2008 by Udo Munk
*
* 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 and ported to COHERENT 4.0
* 02-OCT-06 Release 1.8 modified to compile on modern POSIX OS's
* 18-NOV-06 Release 1.9 modified to work with CP/M sources
* 08-DEC-06 Release 1.10 modified MMU for working with CP/NET
* 17-DEC-06 Release 1.11 TCP/IP sockets for CP/NET
* 25-DEC-06 Release 1.12 CPU speed option
* 19-FEB-07 Release 1.13 various improvements
* 06-OCT-07 Release 1.14 bug fixes and improvements
* 06-AUG-08 Release 1.15 many improvements and Windows support via Cygwin
* 25-AUG-08 Release 1.16 console status I/O loop detection and line discipline
* 20-OCT-08 Release 1.17 frontpanel integrated and Altair/IMSAI emulations
*/
/*
* Like the function "cpu()" this one emulates multi byte opcodes
* starting with 0xdd
*/
#include "config.h"
#include "global.h"
#ifdef FRONTPANEL
#include "../../frontpanel/frontpanel.h"
#endif
static int trap_dd(void);
static int op_popix(void), op_pusix(void);
static int op_jpix(void);
static int op_exspx(void);
static int op_ldspx(void);
static int op_ldixnn(void), op_ldixinn(void), op_ldinx(void);
static int op_adaxd(void), op_acaxd(void), op_suaxd(void), op_scaxd(void);
static int op_andxd(void), op_xorxd(void), op_orxd(void), op_cpxd(void);
static int op_decxd(void), op_incxd(void);
static int op_addxb(void), op_addxd(void), op_addxs(void), op_addxx(void);
static int op_incix(void), op_decix(void);
static int op_ldaxd(void), op_ldbxd(void), op_ldcxd(void);
static int op_lddxd(void), op_ldexd(void);
static int op_ldhxd(void), op_ldlxd(void);
static int op_ldxda(void), op_ldxdb(void), op_ldxdc(void);
static int op_ldxdd(void), op_ldxde(void);
static int op_ldxdh(void), op_ldxdl(void), op_ldxdn(void);
extern int op_ddcb_handel(void);
#ifdef Z80_UNDOC
static int op_undoc_ldixl(void);
static int op_undoc_cpixl(void);
#endif
long op_dd_handel(void)
{
register int t;
static int (*op_dd[256]) (void) = {
trap_dd, /* 0x00 */
trap_dd, /* 0x01 */
trap_dd, /* 0x02 */
trap_dd, /* 0x03 */
trap_dd, /* 0x04 */
trap_dd, /* 0x05 */
trap_dd, /* 0x06 */
trap_dd, /* 0x07 */
trap_dd, /* 0x08 */
op_addxb, /* 0x09 */
trap_dd, /* 0x0a */
trap_dd, /* 0x0b */
trap_dd, /* 0x0c */
trap_dd, /* 0x0d */
trap_dd, /* 0x0e */
trap_dd, /* 0x0f */
trap_dd, /* 0x10 */
trap_dd, /* 0x11 */
trap_dd, /* 0x12 */
trap_dd, /* 0x13 */
trap_dd, /* 0x14 */
trap_dd, /* 0x15 */
trap_dd, /* 0x16 */
trap_dd, /* 0x17 */
trap_dd, /* 0x18 */
op_addxd, /* 0x19 */
trap_dd, /* 0x1a */
trap_dd, /* 0x1b */
trap_dd, /* 0x1c */
trap_dd, /* 0x1d */
trap_dd, /* 0x1e */
trap_dd, /* 0x1f */
trap_dd, /* 0x20 */
op_ldixnn, /* 0x21 */
op_ldinx, /* 0x22 */
op_incix, /* 0x23 */
trap_dd, /* 0x24 */
trap_dd, /* 0x25 */
trap_dd, /* 0x26 */
trap_dd, /* 0x27 */
trap_dd, /* 0x28 */
op_addxx, /* 0x29 */
op_ldixinn, /* 0x2a */
op_decix, /* 0x2b */
trap_dd, /* 0x2c */
trap_dd, /* 0x2d */
trap_dd, /* 0x2e */
trap_dd, /* 0x2f */
trap_dd, /* 0x30 */
trap_dd, /* 0x31 */
trap_dd, /* 0x32 */
trap_dd, /* 0x33 */
op_incxd, /* 0x34 */
op_decxd, /* 0x35 */
op_ldxdn, /* 0x36 */
trap_dd, /* 0x37 */
trap_dd, /* 0x38 */
op_addxs, /* 0x39 */
trap_dd, /* 0x3a */
trap_dd, /* 0x3b */
trap_dd, /* 0x3c */
trap_dd, /* 0x3d */
trap_dd, /* 0x3e */
trap_dd, /* 0x3f */
trap_dd, /* 0x40 */
trap_dd, /* 0x41 */
trap_dd, /* 0x42 */
trap_dd, /* 0x43 */
trap_dd, /* 0x44 */
trap_dd, /* 0x45 */
op_ldbxd, /* 0x46 */
trap_dd, /* 0x47 */
trap_dd, /* 0x48 */
trap_dd, /* 0x49 */
trap_dd, /* 0x4a */
trap_dd, /* 0x4b */
trap_dd, /* 0x4c */
trap_dd, /* 0x4d */
op_ldcxd, /* 0x4e */
trap_dd, /* 0x4f */
trap_dd, /* 0x50 */
trap_dd, /* 0x51 */
trap_dd, /* 0x52 */
trap_dd, /* 0x53 */
trap_dd, /* 0x54 */
trap_dd, /* 0x55 */
op_lddxd, /* 0x56 */
trap_dd, /* 0x57 */
trap_dd, /* 0x58 */
trap_dd, /* 0x59 */
trap_dd, /* 0x5a */
trap_dd, /* 0x5b */
trap_dd, /* 0x5c */
trap_dd, /* 0x5d */
op_ldexd, /* 0x5e */
trap_dd, /* 0x5f */
trap_dd, /* 0x60 */
trap_dd, /* 0x61 */
trap_dd, /* 0x62 */
trap_dd, /* 0x63 */
trap_dd, /* 0x64 */
trap_dd, /* 0x65 */
op_ldhxd, /* 0x66 */
trap_dd, /* 0x67 */
trap_dd, /* 0x68 */
trap_dd, /* 0x69 */
trap_dd, /* 0x6a */
trap_dd, /* 0x6b */
trap_dd, /* 0x6c */
trap_dd, /* 0x6d */
op_ldlxd, /* 0x6e */
#ifndef Z80_UNDOC
trap_dd, /* 0x6f */
#else
op_undoc_ldixl,
#endif
op_ldxdb, /* 0x70 */
op_ldxdc, /* 0x71 */
op_ldxdd, /* 0x72 */
op_ldxde, /* 0x73 */
op_ldxdh, /* 0x74 */
op_ldxdl, /* 0x75 */
trap_dd, /* 0x76 */
op_ldxda, /* 0x77 */
trap_dd, /* 0x78 */
trap_dd, /* 0x79 */
trap_dd, /* 0x7a */
trap_dd, /* 0x7b */
trap_dd, /* 0x7c */
trap_dd, /* 0x7d */
op_ldaxd, /* 0x7e */
trap_dd, /* 0x7f */
trap_dd, /* 0x80 */
trap_dd, /* 0x81 */
trap_dd, /* 0x82 */
trap_dd, /* 0x83 */
trap_dd, /* 0x84 */
trap_dd, /* 0x85 */
op_adaxd, /* 0x86 */
trap_dd, /* 0x87 */
trap_dd, /* 0x88 */
trap_dd, /* 0x89 */
trap_dd, /* 0x8a */
trap_dd, /* 0x8b */
trap_dd, /* 0x8c */
trap_dd, /* 0x8d */
op_acaxd, /* 0x8e */
trap_dd, /* 0x8f */
trap_dd, /* 0x90 */
trap_dd, /* 0x91 */
trap_dd, /* 0x92 */
trap_dd, /* 0x93 */
trap_dd, /* 0x94 */
trap_dd, /* 0x95 */
op_suaxd, /* 0x96 */
trap_dd, /* 0x97 */
trap_dd, /* 0x98 */
trap_dd, /* 0x99 */
trap_dd, /* 0x9a */
trap_dd, /* 0x9b */
trap_dd, /* 0x9c */
trap_dd, /* 0x9d */
op_scaxd, /* 0x9e */
trap_dd, /* 0x9f */
trap_dd, /* 0xa0 */
trap_dd, /* 0xa1 */
trap_dd, /* 0xa2 */
trap_dd, /* 0xa3 */
trap_dd, /* 0xa4 */
trap_dd, /* 0xa5 */
op_andxd, /* 0xa6 */
trap_dd, /* 0xa7 */
trap_dd, /* 0xa8 */
trap_dd, /* 0xa9 */
trap_dd, /* 0xaa */
trap_dd, /* 0xab */
trap_dd, /* 0xac */
trap_dd, /* 0xad */
op_xorxd, /* 0xae */
trap_dd, /* 0xaf */
trap_dd, /* 0xb0 */
trap_dd, /* 0xb1 */
trap_dd, /* 0xb2 */
trap_dd, /* 0xb3 */
trap_dd, /* 0xb4 */
trap_dd, /* 0xb5 */
op_orxd, /* 0xb6 */
trap_dd, /* 0xb7 */
trap_dd, /* 0xb8 */
trap_dd, /* 0xb9 */
trap_dd, /* 0xba */
trap_dd, /* 0xbb */
trap_dd, /* 0xbc */
#ifndef Z80_UNDOC
trap_dd, /* 0xbd */
#else
op_undoc_cpixl,
#endif
op_cpxd, /* 0xbe */
trap_dd, /* 0xbf */
trap_dd, /* 0xc0 */
trap_dd, /* 0xc1 */
trap_dd, /* 0xc2 */
trap_dd, /* 0xc3 */
trap_dd, /* 0xc4 */
trap_dd, /* 0xc5 */
trap_dd, /* 0xc6 */
trap_dd, /* 0xc7 */
trap_dd, /* 0xc8 */
trap_dd, /* 0xc9 */
trap_dd, /* 0xca */
op_ddcb_handel, /* 0xcb */
trap_dd, /* 0xcc */
trap_dd, /* 0xcd */
trap_dd, /* 0xce */
trap_dd, /* 0xcf */
trap_dd, /* 0xd0 */
trap_dd, /* 0xd1 */
trap_dd, /* 0xd2 */
trap_dd, /* 0xd3 */
trap_dd, /* 0xd4 */
trap_dd, /* 0xd5 */
trap_dd, /* 0xd6 */
trap_dd, /* 0xd7 */
trap_dd, /* 0xd8 */
trap_dd, /* 0xd9 */
trap_dd, /* 0xda */
trap_dd, /* 0xdb */
trap_dd, /* 0xdc */
trap_dd, /* 0xdd */
trap_dd, /* 0xde */
trap_dd, /* 0xdf */
trap_dd, /* 0xe0 */
op_popix, /* 0xe1 */
trap_dd, /* 0xe2 */
op_exspx, /* 0xe3 */
trap_dd, /* 0xe4 */
op_pusix, /* 0xe5 */
trap_dd, /* 0xe6 */
trap_dd, /* 0xe7 */
trap_dd, /* 0xe8 */
op_jpix, /* 0xe9 */
trap_dd, /* 0xea */
trap_dd, /* 0xeb */
trap_dd, /* 0xec */
trap_dd, /* 0xed */
trap_dd, /* 0xee */
trap_dd, /* 0xef */
trap_dd, /* 0xf0 */
trap_dd, /* 0xf1 */
trap_dd, /* 0xf2 */
trap_dd, /* 0xf3 */
trap_dd, /* 0xf4 */
trap_dd, /* 0xf5 */
trap_dd, /* 0xf6 */
trap_dd, /* 0xf7 */
trap_dd, /* 0xf8 */
op_ldspx, /* 0xf9 */
trap_dd, /* 0xfa */
trap_dd, /* 0xfb */
trap_dd, /* 0xfc */
trap_dd, /* 0xfd */
trap_dd, /* 0xfe */
trap_dd /* 0xff */
};
#ifdef WANT_TIM
t = (*op_dd[*PC++]) (); /* execute next opcode */
#else
(*op_dd[*PC++]) ();
#endif
#ifdef WANT_PCC
if (PC > ram + 65535) /* correct PC overrun */
PC = ram;
#endif
return(t);
}
/*
* This function traps all illegal opcodes following the
* initial 0xdd of a multi byte opcode.
*/
static int trap_dd(void)
{
cpu_error = OPTRAP2;
cpu_state = STOPPED;
return(0);
}
static int op_popix(void) /* POP IX */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_STACK | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
#ifdef WANT_SPC
if (STACK <= ram)
STACK = ram + 65536L;
#endif
IX = *STACK++;
#ifdef WANT_SPC
if (STACK <= ram)
STACK = ram + 65536L;
#endif
IX += *STACK++ << 8;
return(14);
}
static int op_pusix(void) /* PUSH IX */
{
#ifdef BUS_8080
cpu_bus = CPU_STACK;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
#ifdef WANT_SPC
if (STACK <= ram)
STACK = ram + 65536L;
#endif
*--STACK = IX >> 8;
#ifdef WANT_SPC
if (STACK <= ram)
STACK = ram + 65536L;
#endif
*--STACK = IX;
return(15);
}
static int op_jpix(void) /* JP (IX) */
{
PC = ram + IX;
return(8);
}
static int op_exspx(void) /* EX (SP),IX */
{
register int i;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_STACK | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
i = *STACK + (*(STACK + 1) << 8);
*STACK = IX;
*(STACK + 1) = IX >> 8;
IX = i;
#ifdef BUS_8080
cpu_bus = CPU_STACK;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(23);
}
static int op_ldspx(void) /* LD SP,IX */
{
STACK = ram + IX;
return(10);
}
static int op_ldixnn(void) /* LD IX,nn */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
IX = *PC++;
IX += *PC++ << 8;
return(14);
}
static int op_ldixinn(void) /* LD IX,(nn) */
{
register BYTE *p;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
p = ram + *PC++;
p += *PC++ << 8;
IX = *p++;
IX += *p << 8;
return(20);
}
static int op_ldinx(void) /* LD (nn),IX */
{
register BYTE *p;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
p = ram + *PC++;
p += *PC++ << 8;
*p++ = IX;
*p = IX >> 8;
return(20);
}
static int op_adaxd(void) /* ADD A,(IX+d) */
{
register int i;
register BYTE P;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
P = *(ram + IX + (signed char) *PC++);
((A & 0xf) + (P & 0xf) > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(A + P > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
A = i = (signed char) A + (signed char) P;
(i < -128 || i > 127) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F &= ~N_FLAG;
return(19);
}
static int op_acaxd(void) /* ADC A,(IX+d) */
{
register int i, carry;
register BYTE P;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
carry = (F & C_FLAG) ? 1 : 0;
P = *(ram + IX + (signed char) *PC++);
((A & 0xf) + (P & 0xf) + carry > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(A + P + carry > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
A = i = (signed char) A + (signed char) P + carry;
(i < -128 || i > 127) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F &= ~N_FLAG;
return(19);
}
static int op_suaxd(void) /* SUB A,(IX+d) */
{
register int i;
register BYTE P;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
P = *(ram + IX + (signed char) *PC++);
((P & 0xf) > (A & 0xf)) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(P > A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
A = i = (signed char) A - (signed char) P;
(i < -128 || i > 127) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F |= N_FLAG;
return(19);
}
static int op_scaxd(void) /* SBC A,(IX+d) */
{
register int i, carry;
register BYTE P;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
carry = (F & C_FLAG) ? 1 : 0;
P = *(ram + IX + (signed char) *PC++);
((P & 0xf) + carry > (A & 0xf)) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(P + carry > A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
A = i = (signed char) A - (signed char) P - carry;
(i < -128 || i > 127) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F |= N_FLAG;
return(19);
}
static int op_andxd(void) /* AND (IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
A &= *(ram + IX + (signed char) *PC++);
(A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F |= H_FLAG;
(parrity[A]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
F &= ~(N_FLAG | C_FLAG);
return(19);
}
static int op_xorxd(void) /* XOR (IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
A ^= *(ram + IX + (signed char) *PC++);
(A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
(parrity[A]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
F &= ~(H_FLAG | N_FLAG | C_FLAG);
return(19);
}
static int op_orxd(void) /* OR (IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
A |= *(ram + IX + (signed char) *PC++);
(A & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(A) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
(parrity[A]) ? (F &= ~P_FLAG) : (F |= P_FLAG);
F &= ~(H_FLAG | N_FLAG | C_FLAG);
return(19);
}
static int op_cpxd(void) /* CP (IX+d) */
{
register int i;
register BYTE P;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
P = *(ram + IX + (signed char) *PC++);
((P & 0xf) > (A & 0xf)) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(P > A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
i = (signed char) A - (signed char) P;
(i < -128 || i > 127) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(i & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(i) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F |= N_FLAG;
return(19);
}
static int op_incxd(void) /* INC (IX+d) */
{
register BYTE *p;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
p = ram + IX + (signed char) *PC++;
((*p & 0xf) + 1 > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(*p)++;
(*p == 128) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(*p & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(*p) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F &= ~N_FLAG;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(23);
}
static int op_decxd(void) /* DEC (IX+d) */
{
register BYTE *p;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
p = ram + IX + (signed char) *PC++;
(((*p - 1) & 0xf) == 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(*p)--;
(*p == 127) ? (F |= P_FLAG) : (F &= ~P_FLAG);
(*p & 128) ? (F |= S_FLAG) : (F &= ~S_FLAG);
(*p) ? (F &= ~Z_FLAG) : (F |= Z_FLAG);
F |= N_FLAG;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(23);
}
static int op_addxb(void) /* ADD IX,BC */
{
register int carry;
BYTE ixl = IX & 0xff;
BYTE ixh = IX >> 8;
carry = (ixl + C > 255) ? 1 : 0;
ixl += C;
((ixh & 0xf) + (B & 0xf) + carry > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(ixh + B + carry > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
ixh += B + carry;
IX = (ixh << 8) + ixl;
F &= ~N_FLAG;
return(15);
}
static int op_addxd(void) /* ADD IX,DE */
{
register int carry;
BYTE ixl = IX & 0xff;
BYTE ixh = IX >> 8;
carry = (ixl + E > 255) ? 1 : 0;
ixl += E;
((ixh & 0xf) + (D & 0xf) + carry > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(ixh + D + carry > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
ixh += D + carry;
IX = (ixh << 8) + ixl;
F &= ~N_FLAG;
return(15);
}
static int op_addxs(void) /* ADD IX,SP */
{
register int carry;
BYTE ixl = IX & 0xff;
BYTE ixh = IX >> 8;
BYTE spl = (STACK - ram) & 0xff;
BYTE sph = (STACK - ram) >> 8;
carry = (ixl + spl > 255) ? 1 : 0;
ixl += spl;
((ixh & 0xf) + (sph & 0xf) + carry > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(ixh + sph + carry > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
ixh += sph + carry;
IX = (ixh << 8) + ixl;
F &= ~N_FLAG;
return(15);
}
static int op_addxx(void) /* ADD IX,IX */
{
register int carry;
BYTE ixl = IX & 0xff;
BYTE ixh = IX >> 8;
carry = (ixl << 1 > 255) ? 1 : 0;
ixl <<= 1;
((ixh & 0xf) + (ixh & 0xf) + carry > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
(ixh + ixh + carry > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
ixh += ixh + carry;
IX = (ixh << 8) + ixl;
F &= ~N_FLAG;
return(15);
}
static int op_incix(void) /* INC IX */
{
IX++;
return(10);
}
static int op_decix(void) /* DEC IX */
{
IX--;
return(10);
}
static int op_ldaxd(void) /* LD A,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
A = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_ldbxd(void) /* LD B,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
B = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_ldcxd(void) /* LD C,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
C = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_lddxd(void) /* LD D,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
D = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_ldexd(void) /* LD E,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
E = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_ldhxd(void) /* LD H,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
H = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_ldlxd(void) /* LD L,(IX+d) */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
L = *(IX + (signed char) *PC++ + ram);
return(19);
}
static int op_ldxda(void) /* LD (IX+d),A */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = A;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxdb(void) /* LD (IX+d),B */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = B;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxdc(void) /* LD (IX+d),C */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = C;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxdd(void) /* LD (IX+d),D */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = D;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxde(void) /* LD (IX+d),E */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = E;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxdh(void) /* LD (IX+d),H */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = H;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxdl(void) /* LD (IX+d),L */
{
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
*(IX + (signed char) *PC++ + ram) = L;
#ifdef BUS_8080
cpu_bus = 0;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
return(19);
}
static int op_ldxdn(void) /* LD (IX+d),n */
{
register int d;
#ifdef BUS_8080
cpu_bus = CPU_WO | CPU_MEMR;
#endif
#ifdef FRONTPANEL
fp_sampleLightGroup(0, 0);
#endif
d = (signed char) *PC++;
*(IX + d + ram) = *PC++;
#ifdef BUS_8080
cpu_bus = 0;
#endif