forked from amberisvibin/chibi-pc09
copy all local files to repo
cp/m files, sprites, circuit design
This commit is contained in:
Amber
727
emu/z80pack-1.9/z80sim/sim3.c
Normal file
727
emu/z80pack-1.9/z80sim/sim3.c
Normal file
@@ -0,0 +1,727 @@
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/*
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* Z80SIM - a Z80-CPU simulator
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*
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* Copyright (C) 1987-2006 by Udo Munk
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*
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* History:
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* 28-SEP-87 Development on TARGON/35 with AT&T Unix System V.3
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* 11-JAN-89 Release 1.1
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* 08-FEB-89 Release 1.2
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* 13-MAR-89 Release 1.3
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* 09-FEB-90 Release 1.4 Ported to TARGON/31 M10/30
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* 20-DEC-90 Release 1.5 Ported to COHERENT 3.0
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* 10-JUN-92 Release 1.6 long casting problem solved with COHERENT 3.2
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* and some optimization
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* 25-JUN-92 Release 1.7 comments in english
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* 07-OCT-06 Release 1.8 modified to compile on modern POSIX OS's
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*/
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/*
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* Like the function "cpu()" this one emulates multi byte opcodes
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* starting with 0xdd
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*/
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#include "sim.h"
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#include "simglb.h"
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static int trap_dd(void);
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static int op_popix(void), op_pusix(void);
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static int op_jpix(void);
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static int op_exspx(void);
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static int op_ldspx(void);
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static int op_ldixnn(void), op_ldixinn(void), op_ldinx(void);
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static int op_adaxd(void), op_acaxd(void), op_suaxd(void), op_scaxd(void);
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static int op_andxd(void), op_xorxd(void), op_orxd(void), op_cpxd(void);
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static int op_decxd(void), op_incxd(void);
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static int op_addxb(void), op_addxd(void), op_addxs(void), op_addxx();
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static int op_incix(void), op_decix(void);
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static int op_ldaxd(void), op_ldbxd(void), op_ldcxd(void);
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static int op_lddxd(), op_ldexd(void);
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static int op_ldhxd(void), op_ldlxd(void);
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static int op_ldxda(void), op_ldxdb(void), op_ldxdc(void);
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static int op_ldxdd(), op_ldxde(void);
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static int op_ldxdh(void), op_ldxdl(void), op_ldxdn(void);
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extern int op_ddcb_handel(void);
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long op_dd_handel(void)
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{
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register int t;
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static int (*op_dd[256]) (void) = {
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trap_dd, /* 0x00 */
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trap_dd, /* 0x01 */
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trap_dd, /* 0x02 */
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trap_dd, /* 0x03 */
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trap_dd, /* 0x04 */
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trap_dd, /* 0x05 */
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trap_dd, /* 0x06 */
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trap_dd, /* 0x07 */
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trap_dd, /* 0x08 */
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op_addxb, /* 0x09 */
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trap_dd, /* 0x0a */
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trap_dd, /* 0x0b */
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trap_dd, /* 0x0c */
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trap_dd, /* 0x0d */
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trap_dd, /* 0x0e */
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trap_dd, /* 0x0f */
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trap_dd, /* 0x10 */
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trap_dd, /* 0x11 */
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trap_dd, /* 0x12 */
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trap_dd, /* 0x13 */
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trap_dd, /* 0x14 */
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trap_dd, /* 0x15 */
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trap_dd, /* 0x16 */
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trap_dd, /* 0x17 */
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trap_dd, /* 0x18 */
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op_addxd, /* 0x19 */
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trap_dd, /* 0x1a */
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trap_dd, /* 0x1b */
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trap_dd, /* 0x1c */
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trap_dd, /* 0x1d */
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trap_dd, /* 0x1e */
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trap_dd, /* 0x1f */
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trap_dd, /* 0x20 */
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op_ldixnn, /* 0x21 */
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op_ldinx, /* 0x22 */
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op_incix, /* 0x23 */
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trap_dd, /* 0x24 */
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trap_dd, /* 0x25 */
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trap_dd, /* 0x26 */
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trap_dd, /* 0x27 */
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trap_dd, /* 0x28 */
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op_addxx, /* 0x29 */
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op_ldixinn, /* 0x2a */
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op_decix, /* 0x2b */
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trap_dd, /* 0x2c */
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trap_dd, /* 0x2d */
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trap_dd, /* 0x2e */
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trap_dd, /* 0x2f */
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trap_dd, /* 0x30 */
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trap_dd, /* 0x31 */
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trap_dd, /* 0x32 */
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trap_dd, /* 0x33 */
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op_incxd, /* 0x34 */
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op_decxd, /* 0x35 */
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op_ldxdn, /* 0x36 */
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trap_dd, /* 0x37 */
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trap_dd, /* 0x38 */
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op_addxs, /* 0x39 */
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trap_dd, /* 0x3a */
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trap_dd, /* 0x3b */
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trap_dd, /* 0x3c */
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trap_dd, /* 0x3d */
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trap_dd, /* 0x3e */
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trap_dd, /* 0x3f */
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trap_dd, /* 0x40 */
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trap_dd, /* 0x41 */
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trap_dd, /* 0x42 */
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trap_dd, /* 0x43 */
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trap_dd, /* 0x44 */
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trap_dd, /* 0x45 */
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op_ldbxd, /* 0x46 */
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trap_dd, /* 0x47 */
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trap_dd, /* 0x48 */
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trap_dd, /* 0x49 */
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trap_dd, /* 0x4a */
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trap_dd, /* 0x4b */
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trap_dd, /* 0x4c */
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trap_dd, /* 0x4d */
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op_ldcxd, /* 0x4e */
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trap_dd, /* 0x4f */
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trap_dd, /* 0x50 */
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trap_dd, /* 0x51 */
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trap_dd, /* 0x52 */
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trap_dd, /* 0x53 */
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trap_dd, /* 0x54 */
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trap_dd, /* 0x55 */
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op_lddxd, /* 0x56 */
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trap_dd, /* 0x57 */
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trap_dd, /* 0x58 */
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trap_dd, /* 0x59 */
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trap_dd, /* 0x5a */
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trap_dd, /* 0x5b */
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trap_dd, /* 0x5c */
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trap_dd, /* 0x5d */
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op_ldexd, /* 0x5e */
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trap_dd, /* 0x5f */
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trap_dd, /* 0x60 */
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trap_dd, /* 0x61 */
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trap_dd, /* 0x62 */
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trap_dd, /* 0x63 */
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trap_dd, /* 0x64 */
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trap_dd, /* 0x65 */
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op_ldhxd, /* 0x66 */
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trap_dd, /* 0x67 */
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trap_dd, /* 0x68 */
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trap_dd, /* 0x69 */
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trap_dd, /* 0x6a */
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trap_dd, /* 0x6b */
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trap_dd, /* 0x6c */
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trap_dd, /* 0x6d */
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op_ldlxd, /* 0x6e */
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trap_dd, /* 0x6f */
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op_ldxdb, /* 0x70 */
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op_ldxdc, /* 0x71 */
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op_ldxdd, /* 0x72 */
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op_ldxde, /* 0x73 */
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op_ldxdh, /* 0x74 */
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op_ldxdl, /* 0x75 */
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trap_dd, /* 0x76 */
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op_ldxda, /* 0x77 */
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trap_dd, /* 0x78 */
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trap_dd, /* 0x79 */
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trap_dd, /* 0x7a */
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trap_dd, /* 0x7b */
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trap_dd, /* 0x7c */
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trap_dd, /* 0x7d */
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op_ldaxd, /* 0x7e */
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trap_dd, /* 0x7f */
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trap_dd, /* 0x80 */
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trap_dd, /* 0x81 */
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trap_dd, /* 0x82 */
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trap_dd, /* 0x83 */
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trap_dd, /* 0x84 */
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trap_dd, /* 0x85 */
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op_adaxd, /* 0x86 */
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trap_dd, /* 0x87 */
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trap_dd, /* 0x88 */
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trap_dd, /* 0x89 */
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trap_dd, /* 0x8a */
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trap_dd, /* 0x8b */
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trap_dd, /* 0x8c */
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trap_dd, /* 0x8d */
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op_acaxd, /* 0x8e */
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trap_dd, /* 0x8f */
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trap_dd, /* 0x90 */
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trap_dd, /* 0x91 */
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trap_dd, /* 0x92 */
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trap_dd, /* 0x93 */
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trap_dd, /* 0x94 */
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trap_dd, /* 0x95 */
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op_suaxd, /* 0x96 */
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trap_dd, /* 0x97 */
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trap_dd, /* 0x98 */
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trap_dd, /* 0x99 */
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trap_dd, /* 0x9a */
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trap_dd, /* 0x9b */
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trap_dd, /* 0x9c */
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trap_dd, /* 0x9d */
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op_scaxd, /* 0x9e */
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trap_dd, /* 0x9f */
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trap_dd, /* 0xa0 */
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trap_dd, /* 0xa1 */
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trap_dd, /* 0xa2 */
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trap_dd, /* 0xa3 */
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trap_dd, /* 0xa4 */
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trap_dd, /* 0xa5 */
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op_andxd, /* 0xa6 */
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trap_dd, /* 0xa7 */
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trap_dd, /* 0xa8 */
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trap_dd, /* 0xa9 */
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trap_dd, /* 0xaa */
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trap_dd, /* 0xab */
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trap_dd, /* 0xac */
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trap_dd, /* 0xad */
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op_xorxd, /* 0xae */
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trap_dd, /* 0xaf */
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trap_dd, /* 0xb0 */
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trap_dd, /* 0xb1 */
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trap_dd, /* 0xb2 */
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trap_dd, /* 0xb3 */
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trap_dd, /* 0xb4 */
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trap_dd, /* 0xb5 */
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op_orxd, /* 0xb6 */
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trap_dd, /* 0xb7 */
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trap_dd, /* 0xb8 */
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trap_dd, /* 0xb9 */
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trap_dd, /* 0xba */
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trap_dd, /* 0xbb */
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trap_dd, /* 0xbc */
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trap_dd, /* 0xbd */
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op_cpxd, /* 0xbe */
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trap_dd, /* 0xbf */
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trap_dd, /* 0xc0 */
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trap_dd, /* 0xc1 */
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trap_dd, /* 0xc2 */
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trap_dd, /* 0xc3 */
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trap_dd, /* 0xc4 */
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trap_dd, /* 0xc5 */
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trap_dd, /* 0xc6 */
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trap_dd, /* 0xc7 */
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trap_dd, /* 0xc8 */
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trap_dd, /* 0xc9 */
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trap_dd, /* 0xca */
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op_ddcb_handel, /* 0xcb */
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trap_dd, /* 0xcc */
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trap_dd, /* 0xcd */
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trap_dd, /* 0xce */
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trap_dd, /* 0xcf */
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trap_dd, /* 0xd0 */
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trap_dd, /* 0xd1 */
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trap_dd, /* 0xd2 */
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trap_dd, /* 0xd3 */
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trap_dd, /* 0xd4 */
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trap_dd, /* 0xd5 */
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trap_dd, /* 0xd6 */
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trap_dd, /* 0xd7 */
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trap_dd, /* 0xd8 */
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trap_dd, /* 0xd9 */
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trap_dd, /* 0xda */
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trap_dd, /* 0xdb */
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trap_dd, /* 0xdc */
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trap_dd, /* 0xdd */
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trap_dd, /* 0xde */
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trap_dd, /* 0xdf */
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trap_dd, /* 0xe0 */
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op_popix, /* 0xe1 */
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trap_dd, /* 0xe2 */
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op_exspx, /* 0xe3 */
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trap_dd, /* 0xe4 */
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op_pusix, /* 0xe5 */
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trap_dd, /* 0xe6 */
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trap_dd, /* 0xe7 */
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trap_dd, /* 0xe8 */
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op_jpix, /* 0xe9 */
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trap_dd, /* 0xea */
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trap_dd, /* 0xeb */
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trap_dd, /* 0xec */
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trap_dd, /* 0xed */
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trap_dd, /* 0xee */
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trap_dd, /* 0xef */
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trap_dd, /* 0xf0 */
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||||
trap_dd, /* 0xf1 */
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trap_dd, /* 0xf2 */
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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 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 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;
|
||||
|
||||
i = *STACK + (*(STACK + 1) << 8);
|
||||
*STACK = IX;
|
||||
*(STACK + 1) = IX >> 8;
|
||||
IX = i;
|
||||
return(23);
|
||||
}
|
||||
|
||||
static int op_ldspx(void) /* LD SP,IX */
|
||||
{
|
||||
STACK = ram + IX;
|
||||
return(10);
|
||||
}
|
||||
|
||||
static int op_ldixnn(void) /* LD IX,nn */
|
||||
{
|
||||
IX = *PC++;
|
||||
IX += *PC++ << 8;
|
||||
return(14);
|
||||
}
|
||||
|
||||
static int op_ldixinn(void) /* LD IX,(nn) */
|
||||
{
|
||||
register BYTE *p;
|
||||
|
||||
p = ram + *PC++;
|
||||
p += *PC++ << 8;
|
||||
IX = *p++;
|
||||
IX += *p << 8;
|
||||
return(20);
|
||||
}
|
||||
|
||||
static int op_ldinx(void) /* LD (nn),IX */
|
||||
{
|
||||
register BYTE *p;
|
||||
|
||||
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;
|
||||
|
||||
P = *(ram + IX + (char) *PC++);
|
||||
((A & 0xf) + (P & 0xf) > 0xf) ? (F |= H_FLAG) : (F &= ~H_FLAG);
|
||||
(A + P > 255) ? (F |= C_FLAG) : (F &= ~C_FLAG);
|
||||
A = i = (char) A + (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;
|
||||
|
||||
carry = (F & C_FLAG) ? 1 : 0;
|
||||
P = *(ram + IX + (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 = (char) A + (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;
|
||||
|
||||
P = *(ram + IX + (char) *PC++);
|
||||
((P & 0xf) > (A & 0xf)) ? (F |= H_FLAG) : (F &= ~H_FLAG);
|
||||
(P > A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
|
||||
A = i = (char) A - (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;
|
||||
|
||||
carry = (F & C_FLAG) ? 1 : 0;
|
||||
P = *(ram + IX + (char) *PC++);
|
||||
((P & 0xf) + carry > (A & 0xf)) ? (F |= H_FLAG) : (F &= ~H_FLAG);
|
||||
(P + carry > A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
|
||||
A = i = (char) A - (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) */
|
||||
{
|
||||
A &= *(ram + IX + (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) */
|
||||
{
|
||||
A ^= *(ram + IX + (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) */
|
||||
{
|
||||
A |= *(ram + IX + (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;
|
||||
|
||||
P = *(ram + IX + (char) *PC++);
|
||||
((P & 0xf) > (A & 0xf)) ? (F |= H_FLAG) : (F &= ~H_FLAG);
|
||||
(P > A) ? (F |= C_FLAG) : (F &= ~C_FLAG);
|
||||
i = (char) A - (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;
|
||||
|
||||
p = ram + IX + (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;
|
||||
return(23);
|
||||
}
|
||||
|
||||
static int op_decxd(void) /* DEC (IX+d) */
|
||||
{
|
||||
register BYTE *p;
|
||||
|
||||
p = ram + IX + (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;
|
||||
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) */
|
||||
{
|
||||
A = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldbxd(void) /* LD B,(IX+d) */
|
||||
{
|
||||
B = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldcxd(void) /* LD C,(IX+d) */
|
||||
{
|
||||
C = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_lddxd(void) /* LD D,(IX+d) */
|
||||
{
|
||||
D = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldexd(void) /* LD E,(IX+d) */
|
||||
{
|
||||
E = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldhxd(void) /* LD H,(IX+d) */
|
||||
{
|
||||
H = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldlxd(void) /* LD L,(IX+d) */
|
||||
{
|
||||
L = *(IX + (char) *PC++ + ram);
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxda(void) /* LD (IX+d),A */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = A;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxdb(void) /* LD (IX+d),B */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = B;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxdc(void) /* LD (IX+d),C */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = C;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxdd(void) /* LD (IX+d),D */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = D;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxde(void) /* LD (IX+d),E */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = E;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxdh(void) /* LD (IX+d),H */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = H;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxdl(void) /* LD (IX+d),L */
|
||||
{
|
||||
*(IX + (char) *PC++ + ram) = L;
|
||||
return(19);
|
||||
}
|
||||
|
||||
static int op_ldxdn(void) /* LD (IX+d),n */
|
||||
{
|
||||
register int d;
|
||||
|
||||
d = (char) *PC++;
|
||||
*(IX + d + ram) = *PC++;
|
||||
return(19);
|
||||
}
|
||||
Reference in New Issue
Block a user