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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
casm - Simple, portable assembler
Copyright (C) 2003-2015 Ian Cowburn (ianc@noddybox.co.uk)
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 3 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, see <http://www.gnu.org/licenses/>.
-------------------------------------------------------------------------
Commodore T64 tape output handler.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "global.h"
#include "codepage.h"
#include "prgout.h"
#include "expr.h"
/* ---------------------------------------- MACROS & TYPES
*/
/* ---------------------------------------- PRIVATE TYPES AND VARS
*/
enum option_t
{
OPT_START_ADDR
};
static const ValueTable option_set[]=
{
{"prg-start", OPT_START_ADDR},
{NULL}
};
typedef struct
{
int start_addr;
} Options;
static Options options =
{
-1
};
/* ---------------------------------------- PRIVATE FUNCTIONS
*/
static int PokeB(Byte *mem, int addr, Byte b)
{
mem[addr++] = b;
return (addr % 0x10000);
}
static int PokeW(Byte *mem, int addr, int w)
{
addr = PokeB(mem, addr, w & 0xff);
return PokeB(mem, addr, (w & 0xff00) >> 8);
}
static int PokeS(Byte *mem, int addr, const char *str)
{
while(*str)
{
addr = PokeB(mem, addr, CodeFromNative(CP_CBM, *str++));
}
return addr;
}
static void WriteByte(FILE *fp, Byte b)
{
putc(b, fp);
}
static void WriteWord(FILE *fp, int w)
{
WriteByte(fp, w & 0xff);
WriteByte(fp, (w & 0xff00) >> 8);
}
/* ---------------------------------------- INTERFACES
*/
const ValueTable *PRGOutputOptions(void)
{
return option_set;
}
CommandStatus PRGOutputSetOption(int opt, int argc, char *argv[],
int quoted[], char *err, size_t errsize)
{
CommandStatus stat = CMD_OK;
CMD_ARGC_CHECK(1);
switch(opt)
{
case OPT_START_ADDR:
CMD_EXPR(argv[0], options.start_addr);
break;
default:
break;
}
return stat;
}
int PRGOutput(const char *filename, const char *filename_bank,
MemoryBank **bank, int count, char *error, size_t error_size)
{
int f;
for(f = 0; f < count; f++)
{
FILE *fp;
char buff[4096];
const char *name;
Byte *mem;
int min, max, len;
char sys[16];
int addr = 0x803;
int next;
if (count == 1)
{
name = filename;
}
else
{
snprintf(buff, sizeof buff, filename_bank, bank[f]->number);
name = buff;
}
if (!(fp = fopen(name, "wb")))
{
snprintf(error, error_size, "Failed to open %s", name);
return FALSE;
}
mem = bank[f]->memory;
min = bank[f]->min_address_used;
max = bank[f]->max_address_used;
/* We're going to prepend some BASIC
*/
if (min < 0x810)
{
snprintf(error, error_size, "Bank starts below a safe "
"area to add BASIC loader");
return FALSE;
}
if (options.start_addr == -1)
{
snprintf(sys, sizeof sys, "%d", bank[f]->min_address_used);
}
else
{
snprintf(sys, sizeof sys, "%d", options.start_addr);
}
addr = PokeW(mem, addr, 10);
addr = PokeB(mem, addr, 0x9e);
addr = PokeS(mem, addr, sys);
addr = PokeB(mem, addr, 0x00);
next = addr;
addr = PokeW(mem, addr, 0x00);
PokeW(mem, 0x801, next);
min = 0x801; /* Start of BASIC */
len = max - min + 1;
/* Output PRG file
*/
WriteWord(fp, min);
fwrite(mem + min, len, 1, fp);
fclose(fp);
}
return TRUE;
}
/*
vim: ai sw=4 ts=8 expandtab
*/
|
