blob: f6f1de746879c7335c1ef1f4eaf6f1fa6dc0fec9 (
plain)
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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
* Copyright (C) 1996-1998 Szeredi Miklos
* Email: mszeredi@inf.bme.hu
*
* 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. See the file COPYING.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "z80.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "zxconfig.h"
#include "helpers.h"
Z80 PRNM(proc) IBSS_ATTR;
byte PRNM(inports)[PORTNUM] IBSS_ATTR;
byte PRNM(outports)[PORTNUM] IBSS_ATTR;
#ifdef SPECT_MEM
#define NUM64KSEGS 3
#endif
#ifndef NUM64KSEGS
#define NUM64KSEGS 1
#endif
static byte *a64kmalloc(int num64ksegs)
{
byte *bigmem;
bigmem = (byte *) my_malloc((unsigned) (0x10000 * (num64ksegs + 1)));
if(bigmem == NULL) {
/*fprintf(stderr, "Out of memory!\n");*/
/*exit(1);*/
}
return (byte *) (( (long) bigmem & ~((long) 0xFFFF)) + 0x10000);
}
void PRNM(init)(void)
{
qbyte i;
DANM(mem) = a64kmalloc(NUM64KSEGS);
rb->srand((unsigned int)( rb->get_time()->tm_sec+rb->get_time()->tm_min*60 + rb->get_time()->tm_hour*3600));
for(i = 0; i < 0x10000; i++) DANM(mem)[i] = (byte) rb->rand();
for(i = 0; i < NUMDREGS; i++) {
DANM(nr)[i].p = DANM(mem);
DANM(nr)[i].d.d = (dbyte) rb->rand();
}
for(i = 0; i < BACKDREGS; i++) {
DANM(br)[i].p = DANM(mem);
DANM(br)[i].d.d = (dbyte) rb->rand();
}
for(i = 0; i < PORTNUM; i++) PRNM(inports)[i] = PRNM(outports)[i] = 0;
PRNM(local_init)();
return;
}
/* TODO: no interrupt immediately afer EI (not important for spectrum) */
void PRNM(nmi)(void)
{
DANM(iff2) = DANM(iff1);
DANM(iff1) = 0;
DANM(haltstate) = 0;
PRNM(pushpc)();
PC = 0x0066;
}
/* TODO: IM 0 emulation */
void PRNM(interrupt)(int data)
{
if(DANM(iff1)) {
DANM(haltstate) = 0;
DANM(iff1) = DANM(iff2) = 0;
switch(DANM(it_mode)) {
case 0:
PRNM(pushpc)();
PC = 0x0038;
break;
case 1:
PRNM(pushpc)();
PC = 0x0038;
break;
case 2:
PRNM(pushpc)();
PCL = DANM(mem)[(dbyte) (((int) RI << 8) + (data & 0xFF))];
PCH = DANM(mem)[(dbyte) (((int) RI << 8) + (data & 0xFF) + 1)];
break;
}
}
}
void PRNM(reset)(void)
{
DANM(haltstate) = 0;
DANM(iff1) = DANM(iff2) = 0;
DANM(it_mode) = 0;
RI = 0;
RR = 0;
PC = 0;
}
|
