1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* z80.h: z80 emulation core
Copyright (c) 1999-2013 Philip Kendall
$Id: z80.h 4905 2013-03-08 20:21:40Z pak21 $
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#ifndef FUSE_Z80_H
#define FUSE_Z80_H
/* Union allowing a register pair to be accessed as bytes or as a word */
typedef union {
#ifdef WORDS_BIGENDIAN
struct { libspectrum_byte h,l; } b;
#else
struct { libspectrum_byte l,h; } b;
#endif
libspectrum_word w;
} regpair;
/* What's stored in the main processor */
typedef struct {
regpair af,bc,de,hl;
regpair af_,bc_,de_,hl_;
regpair ix,iy;
libspectrum_byte i;
libspectrum_word r; /* The low seven bits of the R register. 16 bits long
so it can also act as an RZX instruction counter */
libspectrum_byte r7; /* The high bit of the R register */
regpair sp,pc;
libspectrum_byte iff1, iff2, im;
int halted;
/* Interrupts were enabled at this time; do not accept any interrupts
until tstates > this value */
libspectrum_signed_dword interrupts_enabled_at;
} processor;
void z80_init( void );
void z80_reset( int hard_reset );
int z80_interrupt( void );
void z80_retn( void );
void z80_do_opcodes(void);
void z80_enable_interrupts( void );
extern processor z80;
extern const libspectrum_byte halfcarry_add_table[];
extern const libspectrum_byte halfcarry_sub_table[];
extern const libspectrum_byte overflow_add_table[];
extern const libspectrum_byte overflow_sub_table[];
extern libspectrum_byte sz53_table[];
extern libspectrum_byte sz53p_table[];
extern libspectrum_byte parity_table[];
extern int z80_interrupt_event, z80_nmi_event;
#endif /* #ifndef FUSE_Z80_H */
|
